Euryrhynchus amazoniensis Tiefenbacher, 1978,

Pachelle, Paulo P. G. & Tavares, Marcos, 2018, The freshwater shrimp family Euryrhynchidae Holthuis, 1950 (Crustacea: Decapoda: Caridea) revisited, with a taxonomic revision of the genus Euryrhynchus Miers, 1878, Zootaxa 4380 (1): 17-37

publication ID

https://doi.org/10.11646/zootaxa.4380.1.1

publication LSID

lsid:zoobank.org:pub:9DC29ECD-8C44-4F42-BA0E-9B0C830A7C73

persistent identifier

http://treatment.plazi.org/id/03D987F9-FFAA-856A-A4D4-F7FC6130BA17

treatment provided by

Plazi

scientific name

Euryrhynchus amazoniensis Tiefenbacher, 1978
status

 

Euryrhynchus amazoniensis Tiefenbacher, 1978 

( Figs. 8–23View FIGURE 8View FIGURE 9View FIGURE 10View FIGURE 11View FIGURE 12View FIGURE 13View FIGURE 14View FIGURE 15View FIGURE 16View FIGURE 17View FIGURE 18View FIGURE 19View FIGURE 20View FIGURE 21View FIGURE 22View FIGURE 23, 63AView FIGURE 63)

Euryrhynchus amazoniensis Tiefenbacher, 1978: 183  , fig. 2a, b [partim].

Euryrhynchus amazoniensis  — Holthuis 1966: 6, figs. 2, 3 [as E. burchelli Calman, 1907  ]; Irmler, 1975: 391 [as E. burchelli Calman, 1907  , partim]; Gomes Corrêa 1980: 257, figs. 1–9 [as E. wrzesniowskii Miers, 1878  ]; Kensley & Walker 1982: 2, tabs. 2, 3, figs. 1, 2 [partim?]; Coelho & Ramos-Porto 1985: 408 (tab. I); Walker & Ferreira 1985: 266, tab. 1 [partim?]; Magalhães 1988: 46, tab. I, figs. 27–43 [partim]; Magalhães & Walker 1988: 281, tab. I [partim]; Ramos-Porto & Coelho 1990: 108; Odinetz Collart & Magalhães 1994: 2460, tab. 1, 2, fig. 5 [partim?]; Walker 1994: 77, fig. 11 [partim?]; Pereira & García 1995: 117, tab. 1; López & Pereira 1998: 77; Ramos-Porto & Coelho 1998: 330; Walker 2001: 565 [partim?]; Magalhães 2002: 1099; García-Dávila & Magalhães 2003: 665, figs. 1–3, 55; Melo 2003: 322, figs. 174, 175; De Grave 2007: 193; Magalhães & Pereira 2007: 114, tabs. 1–4; Vieira 2008: 67, fig. 5.1a, tab. 5.1; Kemenes et al. 2010: 37, fig. 3; Valencia & Campos 2010: 222, figs. 1, 2; De Grave & Fransen 2011: 309; Vogt 2013: 91; Moscoso 2012: 12, 43; Pimentel & Magalhães 2014: 1302, fig. 2; Ashelby et al. 2015: 16; De Grave et al. 2015: 3, fig. 1; Santos et al. 2018: 23, figs. 1F –J, 7.

Euryrrhynchus amazoniensis  — Vieira 2003: 59, figs. 3.3, 3.4 [lap. cal.].

Euryrhynchus amazonensis  — Pereira 1991: 83, fig. 8; Pereira 1997: 51 (tab. 6), figs. 1, 5A, 15A, 16D, 27B, 29H, 38D, 39, 40, 41; Delgado et al. 1997: 16 [lap. cal.].

Eyryrhynchus amazoniensis  — Santos et al. 2018: fig. 7 [lap. cal.].

Material examined. Holotype: ♂ (cl 5.0 mm), ZSM 406/1, Brazil, Amazonas, about 30 km southeast from Manaus   , Ilha do Careiro , coll. Antonio, xii.1965  . Paratypes: Brazil: 2♂, ZSM 407View Materials /2, Pará, right bank of Rio Cupari, near the mid-length of river, Igarapé do Caxias , among submerse leaflitter and tree branches, coll. H. Sioli, 26.x.1948  ; 2♀, ZSM 407View Materials /3, Pará, high Rio Cupari, Flechal , about 150 km from Santarém, Laguinho Silvestre, coll. R. Braun, 29.xii.1947  ; 2♂, 2♀, ZSM 407View Materials /4, Pará, Fordlândia, Igarapé Arraia , among submerse leaflitter and tree branches, coll. H. Sioli, 5.vii.1950  ; 1♂, ZSM 407View Materials /5, Amazonas, left bank of Rio Negro, between Rio Demini and Rio Branco, small creek above Igarapé Adujá , coll. E.J. Fittkau, 13.ii.1962  ; 1♀, ZSM 407View Materials /6, Amazonas, left bank of Rio Solimões, Santo Antônio do Içá , igarapé, among submerse tree branches, coll. Sattler & H. Sioli, 12.x.1959  ; 1♀, ZSM 407View Materials /7, Pará, between Rio Arapiuns and Rio Tapajós, Igarapé Mentai, Lago da Boca , among aquatic vegetation, coll. H. Sioli, 13.xi.1952  ; 2♂, ZSM 407View Materials /8, Pará, high Rio Tapajós, Missão do Cururu, left bank of Rio Cururu , near the confluence of Rio Juruena and Rio São Manuel, igarapé, coll. H. Sioli, 11.v.1942  ; 1♀, ZSM 407View Materials / 9, Pará, Barra do São Manuel, right bank of Rio São Manuel, near the confluence of Rio Juruena , Igarapé Anipiri , coll. H. Sioli, 21.iv.1941  ; 2♂, 4♀, ZSM 407View Materials /10, Amazonas, left bank of Rio Negro, near the mouth of Rio Içana, Igarapé Caburís , coll. H. Sioli, 24.viii.1952  ; 1♂, ZSM 407View Materials /11, Amazonas, left bank of Rio Negro, near the mouth of Rio Içana, about 60 km north-weast from Uaupés (currently São Gabriel da Cachoeira ), Igarapé Iaitíua , among submerse leaflitter and tree branches, coll. H. Sioli, 24.ix.1952  ; 1♀, ZSM 407View Materials /12, Pará, Mulata, about 110 km northeast from Santarém, left bank of Rio Amazonas , Igarapé do Açaizal , puddle among acai trees ( Euterpe oboracea  ), coll. H. Sioli, 23.ix.1954  ; 1♂, 1♀, ZSM 407View Materials /13, Amazonas, outskirts of Manaus, Ponta Negra, Igarapé do Gigante , coll. E.J. Fittkau, 04.vii.1961  ; 1♀, 1♀ ov, ZSM 407View Materials /14, Amazonas, between Rio Negro and Rio Solimões , in front of Manaus, Lago Janauarí, coll. U. Irmler, 24.v.1971  19.iii.1972; 1♂, ZSM 407/15, Pará, Belterra, about 30 km south-west from Santarém , right bank of Rio Tapajós, mouth of Igarapé Grande, Lago Jruçanga , among aquatic vegetation, coll. R. Braun & H. Sioli, 26.ii –1.xii.1948  ; 1♀, ZSM 407View Materials /16, Amazonas, Rio Madeira, near Três Casas, about 560 km from the mouth of Rio Madeira , Lago Paxiúba , coll. H. Sioli, 14.xi.1941  ; 1♂, 2 juveniles, ZSM 407View Materials /17, Amazonas, Rio Amazonas, about 30 km southeast from Manaus , Ilha do Careiro, coll. Antonio, xii.1965  ; 1♀, ZSM 407View Materials /18, Pará, Santarém , igarapé, coll. Sattler & H. Sioli, 14.i.1960  ; 1♂, 3♀, ZSM 407View Materials /19, Amazonas, outskirts of Manaus, Ponta Negra, Igarapé do Gigante , coll. E.J. Fittkau, 23.vi.1961  ; 3♂, ZSM 407View Materials /20, Amazonas, right bank of Rio Negro, about 30 km upstream from Manaus, Igarapé Castanha , coll. E.J. Fittkau, 22.viii.1969  ; 1♀, ZSM 407View Materials /21, Amazonas, left bank of Rio Solimões, near the mouth of Rio Içá , coll. Sattler & H. Sioli, 07.x.1959  ; 4♂, 13♀, ZSM 407View Materials /22, Amazonas, left bank of Rio Negro, Rio Cuieiras basin, tributary of Igarapé Cachoeira , near Manaus, Igarapé Incarnada, coll. E.J. Fittkau, 24.ix.1962  ; 12♂, 4♀, ZSM 407View Materials / 23, Amazonas, Rio Maués-Açu, 2–3 km above Maués , poço II, coll. H. Sioli, 26.i.1941  ; 9♂, 1♀, ZSM 407View Materials /24, Amazonas, left bank of Rio Negro , between Rio Demini and Rio Branco, Igapó Curitiaú, in submerged leaflitter, coll. E.J. Fittkau, 06.ii.1962  ; 5♂ (cl 2.6– 2.5 mm), SMF 7807View Materials, Amazonas, left bank of Rio Negro , between Rio Demini and Rio Branco, Igarapé Adujá, coll. E.J. Fittkau, 10.ii.1962  ; 1♀, RMNH. CRUS.D.24209, Amazonas, right bank of Rio Purus, Tapauá, near the mouth of Rio Ipixuna , about 280 km from the mouth of Rio Purus , coll. Axelrod, x-xi  . 1963. Additional material: Peru: 3♂ (cl 5.8– 4.5 mm), MZUSP 16453View Materials, Loreto, Requena province, Genaro Herrera, Río Ucayali basin, coll. F.C.T. Lima, i.2014  ; 1♂ (cl 6.0 mm), 5♀ (cl 5.1– 4.6 mm), INPA 732View Materials, Loreto, Requena province, Bagazan district, Genaro Herrera, Quebrada Sapuenillo , coll. Olga O. Collart, 28.viii.1986  ; 26♂ (cl 7.4– 4.2 mm), 20♀ (cl 6.1– 4.1 mm), 6♀ ov (cl 6.2– 5.9 mm), INPA 812View Materials, Loreto, Maynas province, Iquitos, Lago Urocococha , 03°43'49''S 73°15'00''W, coll. Carmen García, 10.i.1999GoogleMaps  ; 1♂ (cl 6.8 mm), 1♀ (cl 5.9 mm), 1♀ ov (cl 6.0 mm), OUMNH.ZC. 2006-21 -0003, Peruvian Amazon , coll. unknown. Venezuela  : 9♂ (cl 8.4–5.0 mm), 4♀ (cl 6.1– 3.9 mm), 1♀ ov (cl 5.9 mm), USNM 221874View Materials, Amazonas, tributary of Río Mavaca , collector and date unknown  ; 15♂ (cl 3.6– 2.9 mm), 14♀ (cl 3.7– 2.4 mm), OUMNH.ZC.2010-04-0016, Amazonas, small tributary near Autana , small puddles, coll. O. Helke & J. Tomas, 18.ii.2010  ; 5♂ (cl 3.8– 2.2 mm), 8♀ (cl 3.5– 2.2 mm), OUMNH.ZC.2013-05-0046, Amazonas, South of Puerto Ayacucho, Río Autana , coll. O. Helke & J. Tomas, 2010  . Brazil: 3♂ (cl 6.5– 4.6 mm), 3♀ (cl 5.7– 4.5 mm), MZUSP 21431View Materials, Amapá, near Porto Grande, Igarapé Japiina, 00°58'375''N 51°36'509''W, in submerged leaflitter, coll. unknown, 27.x.2009  ; 1♂ (cl 4.2 mm), 2♀ (cl 4.9, 3.1 mm), MZUSP 21432View Materials, Amapá, near Porto Grande, tributary of Rio Araguari , 00°57'730''N 51°38'600''W, in submerged leaflitter, coll. unknown, 28.x.2009  ; 2♂ (cl 5.9, 3.7 mm), 2♀ (cl 5.4, 5.2 mm), MZUSP 21433View Materials, Amapá, near Porto Grande , 00°57'470''N 51°39'080''W, in submerged leaflitter, coll. unknown, 28.x.2009  ; 3♂ (cl 7.0– 5.3 mm), MZUSP 21434, same collection data as previous lot; 2♀ ov (cl 5.5, 5.3 mm), MZUSP 22713View Materials, Amapá, Macapá city, igarapé, coll. J. Cunha, 06.iii.2005  ; 1♂ (cl 6.2 mm), MZUSP 22769View Materials, Amapá, Laranjal do Jari, left bank of Rio Jari, 500 m upstream from Cachoeira de Santo Antônio , 00°37'41''S 52°30'31''W, coll. M. Carvalho, AGoogleMaps  . Akama, C. Oliveira, F. Marques, 14.x.2007 [fnc. MRC 2007 10 1401]; 11♂ (cl 7.2– 4.2 mm), 26♀ (cl 5.2– 2.8 mm), INPA 1081View Materials, Amapá, Rio Araguari, igarapé at Cachoeira da Capivara , in submerged leaflitter, coll. C. Magalhães et al., 20.viii.1992  ; 1♂ (cl 4.9 mm), INPA 1214View Materials, Amapá, Serra do Navio, Igarapé Piçarra , coll. V. Py-Daniel et al., 22.iii.1991  ; 3♂ (cl 5.5– 4.1 mm), 2♀ (cl 6.0, 5.8 mm), 1♀ ov (cl 5.8 mm), MZUSP 6399View Materials, Amazonas, Janauacá, Igarapé São José , coll. J.A.M. Donath, 01.x.1977  ; 2♂ (cl 4.7, 4.5 mm), 1♀ (cl 6.3 mm), MZUSP 7297View Materials, Amazonas, near Fonte Boa, igarapé at Jacaré , coll. Epa, 07.x.1968  ; 2♀ (cl 6.0, 5.0 mm), MZUSP 7298, same collection data as previous lot; 4♂ (cl 5.7– 2.8 mm), 3♀ (cl 3.5– 3.3 mm), MZUSP 7299View Materials, Amazonas, left bank of Rio Solimões, north of Codajás, Lago Miuá , coll. Epa, 25.ix.1968  ; 3♂ (cl 7.7– 4.2 mm), 2♀ (cl 6.4, 6.2 mm), 3♀ ov (cl 6.1– 4.8 mm), MZUSP 8181View Materials, Amazonas, right bank of Rio Solimões, Lago Janauacá , coll. J. Donath, 09.vi.1978  ; 2♀ (cl 4.9, 4.2 mm), MZUSP 16331View Materials, Amazonas, Manaus, Tarumã-Mirim , 02°55'S 60°13'W, inside well, in submerged leaflitter, coll. J. Zuanon, 21.x.2004GoogleMaps  ; 5♂ (cl 8.1– 4.7 mm), 2♀ (cl 5.5, 4.6 mm), 2♀ ov (cl 6.1, 5.7 mm), MZUSP 16996View Materials, Amazonas, Parque Nacional do Jaú, Igarapé Nazaré , 01°52.6'S 61°35.6'W, coll. A. Kemenes, xi-xii/1998GoogleMaps  ; 10♂ (cl 6.4– 3.5 mm), 13♀ (cl 6.2– 3.6 mm), 2♀ ov (cl 5.4, 5.3 mm), MZUSP 16997View Materials, Amazonas, Parque Nacional do Jaú, Igarapé Brito , 01°57.1'S 61°50.2'W, coll. A. Kemenes, xi-xiiGoogleMaps  . 1998; 1♂ (cl 7.5 mm), MZUSP 20014View Materials, Amazonas, Barcelos, left bank of Rio Negro , igarapé, 00°28.519'S 63°11.495'W, coll. J.B. Mendonça Jr., 24.x.2008GoogleMaps  ; 1♀ (cl 3.1 mm), MZUSP 20015View Materials, Amazonas, Barcelos, Rio Negro , stomach content of ray, coll. J.B. Mendonça Jr., 23.x.2008  ; 8♂ (cl 5.8– 3.5 mm), 5♀ (cl 4.5– 3.2 mm), MZUSP 22775View Materials, Amazonas, Serra do Mucura, high Rio Tiquié , igarapé, 00°10'N 69°07'W, coll. F.C.T. Lima, 10-11.iii.2006GoogleMaps  ; 10♂ (cl 6.5– 4.2 mm), 9♀ (cl 5.4– 3.8 mm), 2♀ ov (cl 5.3, 5.0 mm), MZUSP 34175View Materials, Amazonas, tributary of Rio Jufari, Igarapé Santa Fé , 01°00.310'S 62°12.162'W, coll. J.B. Mendonça Jr., 01.ix.2011GoogleMaps  ; 1♀ ov (cl 5.2 mm), MZUSP 34177View Materials, Amazonas, tributary of Rio Jufari, Igarapé Tubana , 01°04.953'S 62°07.755'W, inside submerged trunk, coll. J.B. Mendonça Jr., 29.viii.2011GoogleMaps  ; 11♂ (cl 5.9– 3.4 mm), 3♀ (cl 4.8– 4.5 mm), 8♀ ov (cl 5.0– 4.5 mm), MZUSP 34519View Materials, Amazonas, tributary of Rio Jufari, Igarapé Santa Fé , 01°00'29.1''S 62°12'20.6''W, inside submerged trunk and leaflitter, coll. J.B. Mendonça Jr., 06.ix.2011GoogleMaps  ; 19♂ (cl 6.3– 2.5 mm), 9♀ (cl 5.0– 3.1 mm), 2♀ ov (cl 5.0, 4.7 mm), MZUSP 34520View Materials, Amazonas, tributary of Rio Jufari, Igarapé Santa Fé , 01°00.310'S 62°12.182'W, coll. J.B. Mendonça Jr., 01.ix.2011GoogleMaps  ; 1♂ (cl 6.9 mm), MZUSP 34522View Materials, Amazonas, tributary of Rio Jufari, Igarapé Tubana , 01°04.953'S 62°07.755'W, inside submerged trunk, coll. J.B. Mendonça Jr., 29.viii.2011GoogleMaps  ; 2♂ (cl 6.6, 6.0 mm), 1♀ ov (cl 4.9 mm), MZUSP 34523View Materials, Amazonas, tributary of Rio Jufari, Igarapé Tubana , 01°04.953'S 62°07.755'W, col. J.B. Mendonça JrGoogleMaps  .; 42♂ (cl 6.3– 3.2 mm), 46♀ (cl 5.5– 3.3 mm), 5♀ ov (cl 6.0– 4.8 mm), MZUSP 34524View Materials, Amazonas, tributary of Rio Jufari, Igarapé Tubana , 01°04.953'S 62°07.755'W, in submerged leaflitter, coll. J.B. mendonça Jr., 29.viii.2011GoogleMaps  ; 3♂ (cl 6.9– 3.5 mm), 3♀ (cl 5.0– 4.1 mm), INPA 127View Materials, Amazonas, Rio Tefé , black water, coll. unknown, 11.iii.1980  ; 4♂ (cl 5.3– 4.1 mm), 2♀ ov (cl 6.6, 6.4 mm), INPA 264View Materials, Amazonas, Rio Solimões, central lake on Ilha da Marchantaria , coll. B. Friebe, 19.vi.1985  ; 18♂ (cl 7.1– 4.3 mm), 23♀ (cl 5.2– 2.7 mm), 2♀ ov (cl 6.0, 5.4 mm), INPA 268View Materials, Rio Uatumã basin, Rio Uatumã, Balbina e Miriti waterfalls, in submerged leaflitter, coll. C. Magalhães, 13–15.vii.1985  ; 3♀ (cl 6.1–5.0 mm), 1♀ ov (cl 5.9 mm), INPA 272View Materials, Amazonas, tributary on right bank of Rio Uatumã, igarapé at Miriti waterfall, coll. C. Magalhães, 14.vii.1985  ; 2♂ (cl 4.2, 3.8 mm), 3♀ (cl 5.1–5.0 mm), INPA 2164View Materials, Amazonas, Rio Solimões, Codajás Urucuzinho, Lago Urucuri , 03°55'10.80''S 62°02'50.50''W, coll. N. Hamada & J. Nessimian, 15.ix.2003GoogleMaps  ; 5♀ (cl 7.0– 5.5 mm), INPA 2171View Materials, Amazonas, Manaus, Rio Negro, Igarapé do Almofada , coll. O. Collart, 24.ii.1989  ; 1♂ (cl 7.4 mm), 3♀ (cl 6.9–6.0 mm), INPA 2175View Materials, Amazonas, near Manaus, Igarapé Tarumã-Mirim, in submerged leaflitter, coll. C. Magalhães, 23.vi.1983  ; 1♀ ov (cl 5.0 mm), MNRJ 1083View Materials, Amazonas, Borba , coll. Parko, 01.ii.1944  ; 8♀ (cl 5.6–3.0 mm), 2♀ ov (cl 5.4, 5.1 mm), SMF 13121View Materials, Amazonas, South of Manaus, right bank of Rio Solimões, Lago Janauacá , coll. J. Donath, 09.vi.1978  ; 3♂ (cl 7.1– 3.8 mm), 7♀ (cl 5.9– 3.7 mm), SMF 31673View Materials, Amazonas, Parque Nacional do Jaú , 01°50.363'S 61°35.702'W, coll. A. Kemenes, xi-xiiGoogleMaps  . 1998; 3♂ (cl 6.7– 4.7 mm), 1♀ (cl 3.9 mm), 1♀ ov (cl 4.4 mm), NHM 1985.428View Materials, Amazonas, left bank of Rio Solimões, Lago Janauacá , coll. J. Donath, 12.viii.1978  ; 1♀ (cl 3.8 mm), NHM 1988.84View Materials.14 (in part), Amazonas, Igarapé Tarumãzinho , in submerged leaflitter, coll. P.A. Henderson, 24.x.1984  ; 2♂ (cl 5.6, 4.5 mm), 3♀ (cl 6.3– 3.6 mm), 1♀ ov (cl 6.0 mm), MZUSP 22765View Materials, Pará, Ilha do Marajó, Cachoeira do Arari, Igarapé Araticum , 00°57'32.4''S 48°56'7.2''W, coll. J.M. Cunha & J. Zuanon, 16.v.2006GoogleMaps  ; 3♂ (cl 7.0– 5.3 mm), MZUSP 34178View Materials, Pará, near Itaituba, Igarapé Cantagalo, tributary of Rio Tapajós , 05°47.55694'S 57°24.11374'W, coll. J.B. Mendonça Jr., 19.i.2013GoogleMaps  ; 5♂ (cl 5.7– 3.8 mm), 5♀ (cl 6.5– 3.8 mm), MZUSP 34179View Materials, Pará, Itaituba, Rio Tapajós, near Buburé , lake on Ilha Brasileira , 04°44.01667'S 56°40.04333'W, coll. J.B. Mendonça Jr., 17.viii.2013GoogleMaps  ; 5♂ (cl 5.4– 4.7 mm), 2♀ (cl 4.4, 3.8 mm), MZUSP 34180View Materials, Pará, Jacareacanga, near Vila São Martins, lake on the right bank of Rio Tapajós , 06°05.49969'S 57°37.36564'W, coll. J.B. Mendonça Jr., 20.viii.2013GoogleMaps  ; 6♂ (cl 6.6– 4.5 mm), 3♀ (cl 5.1– 3.6 mm), MZUSP 34181View Materials, Pará, Itaituba, near Vila de Mamãe-Anã, lake in island of Rio Tapajós , 05°47.02615'S 57°24.14773'W, coll. J.B. Mendonça Jr., 21.viii.2013GoogleMaps  ; 20♂ (cl 6.4– 3.9 mm), 17♀ (cl 4.8– 3.5 mm), 3♀ ov (cl 6.9– 5.2 mm), INPA 265View Materials, Pará, Rio Trombetas basin, tributary of Rio Mapuera, Igarapé Borges , coll. V. Py-Daniel et al., 27.iv.1985  ; 2♂ (cl 4.2, 4.0 mm), 11♀ (cl 4.7– 2.4 mm), INPA 337View Materials, Pará, right bank of Rio Trombetas, Lago Tapagem , in submerged leaflitter, coll. C. Magalhães, 11.x.1985  ; 4♂ (cl 5.5– 4.6 mm), 8♀ (cl 6.0– 5.1 mm), 3♀ ov (cl 6.1– 5.7 mm), INPA 1109View Materials, Pará, Santarém, Alter-do-Chão, Lago Jacundá , coll. C. García-Dávila, 16.ii.2000  ; 2♀ (cl 6.4, 6.2 mm), INPA 1135View Materials, Pará, Santarém, Alter-do-Chão, Lago Verde , coll. C. García-Dávila, 18.ii.2000  ; 4♂ (cl 6.9– 3.9 mm), 6♀ (cl 5.7– 4.5 mm), INPA 1151View Materials, Pará, Rio Xingu, Igarapé do Ipixuna , coll. unknown, 22.x.1992  ; 32♂ (cl 7.2– 4.6 mm), 23♀ (cl 7.0– 4.8 mm), INPA 1167View Materials, Pará, Rio Xingu, Igarapé do Bom Jardim , coll. unknown, 21.x.1992  ; 55♂ (cl 8.1– 3.6 mm), 78♀ (cl 7.7– 3.5 mm), INPA 1172View Materials, Pará, Rio Xingu, Lago do São Sebastião , coll. J. Zuanon, 09.x.1992  ; 23♂ (cl 6.8– 3.6 mm), 9♀ (cl 5.9– 3.5 mm), INPA 1173View Materials, Pará, Rio Xingu, Lago do São Sebastião , coll. J. Zuanon, 18.x.1992  ; 69♂ (cl 8.0– 3.8 mm), 49♀ (cl 6.9–4.0 mm), INPA 1191View Materials, Pará, between Buburé and São Luis do Tapajós, left bank of Rio Tapajós , flood plain, among submerged leaflitter and loose trunks, coll. C. Magalhães & L. Moraes, 22–23.x.1991  ; 1♀ (cl 4.5 mm), INPA 1198View Materials, Pará, Rio Jamanxim, Ilha da Terra Preta , coll. Raimundo, 20.x.1991  ; 1♀ (cl 4.2 mm), INPA 1205View Materials, Pará, left bank of Rio Tapajós, near the mouth of Rio Cupari , coll. C. Magalhães & L.R. Py-Daniel, 27.x.1991  ; 3♂ (cl 4.9– 3.9 mm), 6♀ (cl 3.4– 3.1 mm), INPA 2166View Materials, Pará, Rio Xingu, Ilha de Babaquara , coll. L.R. Py-Daniel & J. Zuanon, 05.x.1990  ; 1♂ (cl 4.4 mm), 2♀ (cl 3.4, 2.6 mm), INPA 2163View Materials, Pará, Rio Trombetas, Lago Caetano , coll. V. Py-Daniel et al., 09.iii.1986  ; 1♀ (cl 6.5 mm), MPEG 614View Materials, Pará, Belém, Campus de Pesquisa do Museu Paraense Emílio Goeldi , 01°26'41''S 48°25'34''W, coll. F.R. Pimentel & R.M. dos Santos, 15.xii.1998GoogleMaps  ; 2♀ (cl 6.0, 5.6 mm), MPEG 648View Materials, Pará, Belém, Campus de Pesquisa do Museu Paraense Emílio Goeldi , 01°26'41''S 48°25'34''W, coll. F.R. Pimentel & J.O. Dias, 19.i.2000GoogleMaps  ; 1♂ (cl 6.5 mm), MPEG 711View Materials, Pará, Rio Xingu, Altamira , coll. R.M. Souza & Mansinho, 16.xii.2000  ; 4♂ (cl 8.1– 6.3 mm), 1♀ (cl 5.8 mm), MPEG 713View Materials, Pará, Melgaço, Floresta Nacional de Caxiuanã , coll. Equipe Curso de Campo, 08.xi.1999  ; 1♂ (cl 5.7 mm), MZUSP 22768View Materials, Rondônia, Alto Paraíso , 09°42'S 63°19'W, coll. unknown, 20.x.1984GoogleMaps  ; 2♂ (cl 7.0, 6.8 mm), 2♀ ov (cl 6.0, 5.4 mm), INPA 2174View Materials, Rondônia, Fortaleza do Abunã, left bank of Rio Abunã , igarapé, coll. J. Zuanon et al., 05.xi.2003  ; 1♀ (cl 5.6 mm), MZUSP 34176View Materials, Roraima, tributary of Rio Jufari, Igarapé Caicubi , 01°01.567'S 62°06.059'W, coll. J.B. Mendonça Jr., ix.2011GoogleMaps  ; 1♀ ov (cl 4.9 mm), MZUSP 34517View Materials, Roraima, tributary of Rio Jufari, Igarapé Caicubi , 01°01.418'S 62°06.277'W, in submerged leaflitter, coll. J.B. Mendonça Jr., 03.ix.2011GoogleMaps  ; 1♀ (cl 4.9 mm), MZUSP 34518View Materials, Roraima, tributary of Rio Jufari, Igarapé Caicubi , 00°59.264'S 62°06.191'W, in submerged leaflitter, coll. J.B. Mendonça Jr., 02.ix.2011GoogleMaps  ; 5♂ (cl 5.8– 3.8 mm), 2♀ (cl 5.0, 4.1 mm), MZUSP 34521View Materials, Roraima, tributary of Rio Jufari, Igarapé Santa Fé , 01°00.571'S 62°06.191'W, coll. J.B. Mendonça Jr., 06.ix.2011.GoogleMaps 

Type locality. Ilha do Careiro, 30 km south-east of Manaus, Amazonas ( Brazil).

Distribution. Peru (Loreto), Colombia (Amazonas, Guainía, Vichada), Venezuela (Amazonas, Delta Amacuro, Monagas) and Brazil (Amapá, Amazonas, Pará, Rondônia, Roraima) ( Tiefenbacher 1978; Kensley & Walker 1982; Pereira 1991; López & Pereira 1998; García-Dávila & Magalhães 2003; Vieira 2008; Valência & Campos 2010; Pimentel & Magalhães 2014; Santos et al. 2018; present study) ( Fig. 63AView FIGURE 63).

Redescription. Carapace smooth, non-setose. Branchiostegite finely granulated in large specimens, anterior margin produced beyond infra-orbital angle, branchiostegal groove weakly marked. Pterygostomial region produced anteriorly into acute, triangular tooth. Antennal spine conspicuous, placed at same level than infra-orbital angle, partially obscuring infra-orbital angle. Hepatic and branchiostegal spines absent. Rostrum triangular in dorsal view, depressed dorsally, almost reaching or slightly overreaching distal margin of eyes, with row of few long simple setae along each dorsolateral margin ( Figs. 9A –CView FIGURE 9, 10A –CView FIGURE 10, 18A –CView FIGURE 18).

Fourth thoracic sternite with transversal ridge deepening medially, not produced. Fifth thoracic sternite with transversal ridge produced into broad lobe medially. Sixth and seventh thoracic sternites with transversal ridge incomplete, interrupted medially. Eigth thoracic sternite with transverse ridge complete, median region produced anteriorly, V-shaped ( Figs. 9D –FView FIGURE 9, 18D –FView FIGURE 18).

Pleon smooth, non-setose. First to fifth pleurae with postero-ventral margin rounded. Second pleura expanded in both sexes, overlapping both first and third pleurae by almost half width. Third to fifth pleurae with long simple setae on antero-ventral margins. Sixth pleura with postero-ventral margin angular, ventromesial margin with fringe of plumose setae. First to third sternites of males and immature females with median process, third one smallest, sometimes inconspicuous. Fourth to sixth sternites smooth, unarmed. Pre-anal plate smooth, lacking longitudinal carina, distally straight ( Fig. 9G –IView FIGURE 9).

Telson broad, up to twice as long as wide. Lateral margins of telson nearly straight, parallel, not noticeably tapering towards distolateral angle. Distal region of telson broadly rounded, sometimes varying in length, fringed with numerous long, annulate, plumose setae. Distolateral margins of telson with row of few simple setae of variable length. Distolateral angle of telson with pair of cuspidate setae, mesial seta about twice as long as lateral seta. Dorsal surface of telson with two pairs of cuspidate setae, anterior pair usually placed on proximal third of telson length, posterior pair usually placed on medial third of telson length, inserted more mesially than anterior pair. Lateral margin of telson with few long, simple setae. Anal tubercles absent ( Fig. 11A –CView FIGURE 11).

Eyes short, not overreaching proximal half of basal article of antennular peduncle. Cornea somewhat kidneyshaped in dorsal view, occupying the entire distal region and most of lateral region of ocular peduncle, basal line weakly marked, ommatidia hexagonal, ocellar spot (“ocellus”) absent. Ocular peduncles nearly immobile, basal articulation reduced, inconspicuous ( Fig. 9A –CView FIGURE 9, 18CView FIGURE 18).

Antennular peduncle with stylocerite blunt, not produced distally, with cluster of long, simple setae on distodorsal region. Basal article with distolateral angle produced into sharp tooth, reaching or slightly overreaching distolateral projection of medial article, mesial margin fringed with plumose setae, proximal third with ventromesial sharp spine. Medial article almost as long as wide, fringed with plumose setae on both mesial and lateral margins, distolateral and distomesial angles bluntly produced. Distal article quadrate. Lower antennular flagellum long and uniramous. Upper antennular flagellum divided into two rami fused at base by one article; main ramus similar to lower antennular flagellum; accessory ramus shorter and thicker than other antennular flagella, with 3 to 6 free articles, increasing in number in large specimens, length of articles variable, aesthetascs restricted to distal margin of apical article ( Figs. 9A, CView FIGURE 9, 10D –GView FIGURE 10, 18G –IView FIGURE 18).

Antenna with scaphocerite broad, about 1.5 as long as wide, slightly overreaching antennular peduncle, lamella fringed with plumose setae, lateral margin straight or slightly convex, with sharp distal tooth reaching or slightly overreaching lamella. Carpocerite about 3 times as long as wide, reaching distal third of scaphocerite. Basicerite with sharp distolateral tooth reaching proximal fourth of carpocerite, ventral margin of basicerite produced anteriorly into broad, triangular tooth ( Figs. 9A, CView FIGURE 9, 10HView FIGURE 10).

Labrum unarmed, broadly rounded in lateral view, tapering medially into longitudinal ridge. Mandible without palp. Molar process with corneous ridges and rows of short setae distally. Incisor process with 4 corneous teeth ( Figs. 12A –FView FIGURE 12, 19A, BView FIGURE 19).

First maxilla with two endites. Basal endite broader than coxal endite, furnished distally with cuspidate and serrulate setae. Coxal endite densely furnished with serrulate setae. Palp bilobed. Upper lobe of palp stout, broadly rounded distally, overreaching lower lobe. Lower lobe of palp straight, not curving ventrally, with long distal seta ( Fig. 12GView FIGURE 12).

Second maxilla with single endite, distally furnished with numerous simple setae. Endopod small, shorter than endite, large at base. Scaphognathite large, fringed with plumose setae ( Fig. 12HView FIGURE 12).

First maxilliped with endopod quadrate, inner surface concave, distomesial angle furnished with few long plumose setae, outer surface with triangular projection near distal margin. Endites separated by weak suture, best visible in mesial view, margins furnished with papposerrate setae. Exopod well developed, fringed with long plumose setae. Caridean lobe broad, tipping dorsally, fringed with long plumose setae. Epipod unilobed, similar in size with endopod ( Fig. 12I, JView FIGURE 12).

Second maxilliped with podobranch on epipod. Exopod well developed, about twice as long as endopod, fringed with long plumose setae. Endopod with 4 free articles. Penultimate article of endopod furnished with serrate setae on dorsal margin. Ultimate article of endopod with fringes of serrate and papposerrate setae ( Figs. 13AView FIGURE 13, 19C, DView FIGURE 19).

Third maxilliped pediform. Coxa with broad lateral plate, single arthrobranch present. Basis short, about 1/3 length of antepenultimate article of endopod. Endopod with 3 articles, furnished laterally with long simple setae; antepenultimate article longest, furnished mesially with simple setae; penultimate article about 0.7 times length of antepenultimate article, furnished mesially with rows of serrate setae; ultimate article shortest, about 0.8 times length of penultimate article, furnished mesially with rows of serrate setae. Exopod long, reaching proximal third of penultimate article of endopod, fringed with long plumose setae ( Figs. 13B, CView FIGURE 13, 19E –HView FIGURE 19).

First pereopod slender, short, carpus and chela overreaching scaphocerite when fully extended. Merus about twice as long as ischium. Carpus about same length or slightly longer than merus. Chela about 0.7 times length of carpus, distal half furnished ventrally with tufts of long serrulate setae, fingers equal in length with palm, fingertips corneous ( Figs. 13D, EView FIGURE 13, 20A, BView FIGURE 20).

Second pereopod stout, long, pair similar in form, equal or subequal in size in both sexes. Articles varying in size with age, usually slender in small individuals and stout in large individuals. Surface of ischium to propodus (sometimes also proximal region of dactylus) finely granulated, more conspicuous in large specimens. Merus fused with ischium, distoventral angles unarmed, smooth. Carpus in adults stout in dorsal view, approximately twice as long as wide, about same length or slightly shorter than palm, distomesial angle with distal spine. Chela with transverse constriction near articulation with carpus, fingers with pair of teeth on proximal half of each cutting edge, teeth varying in shape and size with age, fingertips corneous ( Figs. 14View FIGURE 14, 15View FIGURE 15, 20C –IView FIGURE 20).

Third pereopod stouter than fourth and fifth pereopods. Merus about 1.5 as long as ischium. Carpus about 0.5 as long as merus. Propodus about 1.7 as long as carpus, ventral margin with 8 to 16 cuspidate setae, some more closely spaced on distal third of propodus, dorsal margin usually without cuspidate setae. Dactylus biunguiculate, at least 0.4 as long as propodus, dorsal margin indented, with single cuspidate seta, placed on mesial side ( Figs. 16A –CView FIGURE 16, 21A, BView FIGURE 21).

Fourth pereopod similar to third pereopod, but thinner. Propodus with ventral margin furnished with 8 to 14 cuspidate setae, dorsal margin usually with single dorsomesial cuspidate seta on distal third, distodorsal angle without cuspidate seta. Dactylus dorsal margin indented, with subdistal pair of cuspidate setae ( Figs. 16D –GView FIGURE 16, 21C, DView FIGURE 21).

Fifth pereopod similar to fourth pereopod, but longer. Carpus about 0.75 as long as merus. Propodus about 1.4 as long as carpus, ventral margin furnished with 7 to 12 cuspidate setae, distal third with 3 to 7 rows of serrate setae, dorsal margin without cuspidate seta. Dactylus about 0.4 as long as propodus, dorsal margin indented, with subdistal pair of cuspidate setae ( Figs. 16H –JView FIGURE 16, 22View FIGURE 22).

Male first pleopod protopodite furnished with short row of cuspidate setae on distomesial margin. Exopod at least twice as long as endopod, fringed with few plumose setae. Endopod furnished with cuspidate setae along distomesial margin, plumose setae absent, appendix interna absent. Second pleopod exopod longer than endopod, fringed with plumose setae. Endopod stout, twisted, modified into gonopod, distal half carinate dorsoventrally, tapering into triangular apex, mesial region with 3 rows of cuspidate setae, median row longer than ventral row, almost reaching distal third of endopod, dorsal row continuing on lateral margin of dorsal carina, setae curve irregularly as row approaches apex of endopod, blocking exopod mesially, mesial margin of dorsal carina with triangular lobe, appendix interna reduced, appendix masculina absent. Third to fifth pleopods protopodites furnished with few long setae on lateral margin. Endopod shorter than exopod, both fringed with plumose setae, appendix interna absent ( Figs. 17A –HView FIGURE 17, 23View FIGURE 23).

Female first and second pleopod endopods shorter than exopods, margins smooth or fringed with fewer plumose setae than exopod, appendix interna absent. Third to fifth pleopod protopodites furnished with few long setae on lateral margins. Endopods shorter than exopods, both fringed with plumose setae, appendix interna absent ( Fig. 17I –MView FIGURE 17).

Uropod broad. Protopodite with well-developed lateral process, at least twice as long as mesial process, curving mesially, furnished distodorsally with transverse row of long simple setae, distomesial angle rounded or angular. Endopod narrower than exopod, fringed with long, annulate, plumose setae, distolateral margin with few long simple setae. Exopod fringed with long, annulate, plumose setae, distal margin somewhat truncated, straight, with cluster of few long simple setae on distolateral margin, diaeresis incomplete, with 5 to 13 cuspidate setae, growing in size towards mesial margin, increasing in number with age ( Fig. 11D –GView FIGURE 11).

Remarks. Euryrhynchus amazoniensis  resembles E. wrzesniowskii  , E. taruman  sp. nov. and E. tuyuca  sp. nov. in having (i) the second pereopod merus with distoventral angles unarmed, smooth ( Fig. 14CView FIGURE 14), (ii) the third pereopod dactylus with 1 cuspidate seta on the dorsal margin, placed on mesial side ( Fig. 16BView FIGURE 16), and (iii) the fourth pereopod propodus usually without cuspidate seta on the distodorsal angle ( Fig. 16E, FView FIGURE 16). However, E. amazoniensis  can be readily recognized as the pterygostomial region of carapace is produced anteriorly into a sharp tooth ( Figs. 9CView FIGURE 9, 10A –CView FIGURE 10). Additional morphological differences between E. amazoniensis  and the two new species are discussed further below. Euryrhynchus amazoniensis  differs from E. wrzesniowskii  in several key characters, including (i) the second pereopod carpus with a distal spine on the distomesial angle ( Fig. 14CView FIGURE 14) (versus second pereopod carpus with distomesial angle unarmed, smooth in E. wrzesniowskii  , Fig. 57DView FIGURE 57), (ii) the fifth pereopod of dactylus with a pair of cuspidate setae on the dorsal margin ( Fig. 16IView FIGURE 16) (versus fifth pereopod dactylus with 1 cuspidate seta, placed on lateral side in E. wrzesniowskii  , Fig. 59G, HView FIGURE 59), and (iii) the male gonopod stout, twisted, not overreaching the exopod, and the appendix interna inconspicuous ( Figs. 17B –EView FIGURE 17, 23View FIGURE 23) (versus male gonopod elongated, straight, overreaching exopod, and appendix interna conspicuous in E. wrzesniowskii  , Figs. 60B, C, LView FIGURE 60, 61View FIGURE 61). Euryrhynchus amazoniensis  is easily separated from E. burchelli  , E. pemoni  , and E. tomasi  on the account of the latter three species having: (i) the second pereopod merus with 1 or 2 spines on the distoventral angles ( Figs. 25DView FIGURE25; 34C, 46D), (ii) the third pereopod dactylus with a pair of cuspidate setae on the dorsal margin ( Figs. 27BView FIGURE 27, 35BView FIGURE 35, 47BView FIGURE 47), and (iii) the fourth pereopod propodus usually with 1 cuspidate seta on the distodorsal angle ( Figs. 27DView FIGURE 27, 35EView FIGURE 35, 47DView FIGURE 47).

The type series from Tiefenbacher (1978) consists of specimens from various localities in the states of Amazonas and Pará (Brazil), most of them collected during the studies of H. Sioli and E.J. Fittkau between the 1950’s and 1970’s (see Sioli 1953, 1954, 1955, 1963; Fittkau 1974). The type series also includes Holthuis’ (1966) and Irmler’s (1975) material from Amazonas (Brazil) previously reported as E. burchelli  . Most specimens from the type series were examined during the present study, except for one lot deposited in Frankfurt (SMF) and four lots deposited in Belgium (Institut Royal des Sciences Naturelles de Belgique, Brussels) (localities 6, 18, 23, 24 and 25 in Tiefenbacher 1978: 179). Although the geographic range of the type series is large, most type specimens corresponded to E. amazoniensis  sensu  stricto, whereas only two lots were reidentified as E. taruman  sp. nov. (see below). The superficial description provided by Tiefenbacher (1978) may be the cause of several identification errors in subsequent publications involving Brazilian material. For instance, Gomes Corrêa (1980) reported an ovigerous female from Borba (Amazonas, Brazil) (MNRJ 1083) as E. wrzesniowskii  , but our analysis revealed that this specimen is actually E. amazoniensis  . A number of studies conducted in the Igarapé Tarumã-Mirim (or Tarumãzinho), north-west of Manaus (Amazonas, Brazil), referred to E. amazoniensis  (see Walker & Ferreira 1985; Magalhães 1988; Magalhães & Walker 1988; Odinetz Collart & Magalhães 1994; Walker 1994, 2001). However, reexamination of lots from this locality, including the voucher specimens from Magalhães (1988) and Magalhães & Walker (1988) (INPA 2169, 2175), often confirmed the presence of E. amazoniensis  sensu  stricto, but also of E. taruman  sp. nov. The material of E. amazoniensis  reported in Walker & Ferreira (1985), Odinetz Collart & Magalhães (1994) and Walker (1994, 2001) was not found at the INPA collections, potentially raising questions about the identity of these specimens. Kensley & Walker (1982) reported E. amazoniensis  from several localities in the Amazon basin (including the Igarapé Tarumã-Mirim), however only the lot from Rio Tefé (Amazonas, Brazil) (INPA 127) was found at INPA and is herein confirmed as E. amazoniensis  sensu  stricto. Part of the specimens reported by Kemenes et al. (2010) and Pimentel & Magalhães (2014) from Amazonas and Pará (Brazil) were reexamined in the present study and confirmed as E. amazoniensis  sensu  stricto. The material of E. amazoniensis  reported from Amapá (Brazil) in Vieira (2008) and from several localities in Venezuela and Colombia in Pereira (1991), López & Pereira (1998) and Valência & Campos (2010) were not examined herein and, consequently, doubt is cast on the identity of the specimens. Finally, E. amazoniensis  is reported herein for the first time from Rondônia.

SMF

Forschungsinstitut und Natur-Museum Senckenberg

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Euryrhynchidae

Genus

Euryrhynchus

Loc

Euryrhynchus amazoniensis Tiefenbacher, 1978

Pachelle, Paulo P. G. & Tavares, Marcos 2018
2018
Loc

Euryrhynchus amazoniensis

Tiefenbacher 1978: 183
1978
Loc

Euryrhynchus amazoniensis

Tiefenbacher 1978
1978
Loc

amazoniensis

Tiefenbacher 1978
1978
Loc

amazoniensis

Tiefenbacher 1978
1978
Loc

E. burchelli

Calman 1907
1907
Loc

E. burchelli

Calman 1907
1907
Loc

E. wrzesniowskii Miers, 1878

sensu Miers 1878
1878