Ophiothrix brasiliensis

Santana, Alisson, Manso, Cynthia L. C., Almeida, Ana C. S. & Alves, Orane F. S., 2020, Taxonomic review of Ophiothrix Müller & Troschel, 1840 (Echinodermata Ophiuroidea) from Brazil, with the description of four new species, Zootaxa 4808 (1), pp. 51-78: 59-62

publication ID

https://doi.org/10.11646/zootaxa.4808.1.3

publication LSID

lsid:zoobank.org:pub:242EEAFF-0966-48A2-9D13-7FF52DDE61A5

persistent identifier

http://treatment.plazi.org/id/23CD96FB-BD3F-4947-960A-1656BD73D4A2

taxon LSID

lsid:zoobank.org:act:23CD96FB-BD3F-4947-960A-1656BD73D4A2

treatment provided by

Plazi

scientific name

Ophiothrix brasiliensis
status

n. sp.

Ophiothrix brasiliensis  n. sp.

( Figs. 6View FIGURE 6, 7View FIGURE 7)

urn:lsid:zoobank.org:act:23CD96FB-BD3F-4947-960A-1656BD73D4A2

Ophiothrix (Ophiothrix) angulata: Tommasi 1970: 54–60  . [São Paulo, Brazil]

Ophiothrix ailsae: Guille & Albuquerque 1987: 147  . [Espírito Santo, Brazil]

Ophiothrix ailsae: Albuquerque & Guille 1991: 9  . [Espírito Santo, Brazil]

Ophiothrix angulata: Borges et al. 2002: 58–59  , fig. 34c–d. [São Paulo, Brazil]

Ophiothrix angulata: Borges et al. 2005: 65–66  . [São Paulo, Brazil]

Ophiothrix angulata: Manso et al. 2008: 194  , fig. 21a–c. [Bahia, Brazil]

Ophiothrix (Ophiothrix) angulata: Viana 2010: 10–14  , fig. 2a–h. [Bahia, Espírito Santo and Rio de Janeiro, Brazil]

Ophiothrix brachyactis: Oliveira et al. 2010: 8  . [Rio de Janeiro, Brazil]

Ophiothrix (Ophiothrix) angulata: Gondim et al. 2013: 67–68  , fig. 2f–j. [Paraíba, Brazil]

Ophiothrix (Ophiothrix) angulata: Gondim et al. 2013: 514–515  , fig. 4a–b. [Piauí and Maranhão, Brazil]

Not Ophiura angulata Say, 1825: 145–146  . [South Carolina, United States]

Not Ophiothrix brachyactis Clark, 1915: 269–270  [Florida, United States]

Not Ophiothrix ailsae Tommasi, 1970: 60–61  , figs. 58–59. [São Paulo, Brazil]

Holotype: UFBA 01731, Salvador, Bahia, Brazil, 12º57’S; 38º21’W, 0 m, coll. VII/2014 by A. Santana, A.C. Almeida & D. MenezesGoogleMaps  . Paratypes: UFBA 00736 (01 specimen)  ; UFBA 00737 (01 specimen)  ; UFBA 00738 (01 specimen), Salvador, Bahia, Brazil, 12º57’S; 38º21’W, 0 m, coll. 1998–2006GoogleMaps  . Additional specimens: ZUEC 01215View Materials (01 specimen), Pará, Brazil, 00º21’– 00º37’S, 46º58’– 44°40’W, 44–50 m, coll. 1967–2009GoogleMaps  ; ZUEC 02442View Materials (03 specimens)  , LIMCE 00362 (08 specimens)  , LIMCE 00206 (02 specimens)  , LIMCE 00112 (01 specimen), Ceará, Brazil, 03º40’S; 38º38’W, 0 m, coll. 2002 by A.C.M Queiroz, O.P. LopesGoogleMaps  , T.M. Garcia & C.B. Melo  ; UFBA 00666 (01 specimen)  , UFBA 00301 (03 specimens)  , UFBA 01070 (06 specimens)  , UFBA 01127 (01 specimen), Salvador, Bahia, Brazil, 12º58’– 13º05’S, 38º31’– 38º39’W, 12 m, coll. 1997–2010GoogleMaps  ; UFBA 01128 (01 specimen), Madre de Deus , Bahia, Brazil, 12º42’S, 38º37’W, 0 m, coll. XII/1994GoogleMaps  by Celso Rodrigues; UFBA 00897 (01 specimen)  UFBA 01126 (01 specimen)  , UFBA 01129 (01 specimen), Camamu Bay , Bahia, Brazil, 13º45’– 13º56’S, 38º50’– 38º59’W, 0–28 m, coll. 2004–2009GoogleMaps  by Lameb; MZUSP 01043View Materials (02 specimens)  , MZUSP 01044View Materials (01 specimens)  , ZUEC 00571View Materials (01 specimens), Ubatuba , São Paulo, Brazil, 23º13’– 23º27’S, 44º45’– 45º02’W, 0–23 m, coll. 1960–2012GoogleMaps  ; UFBA 00532 (01 specimens), Ilha do Mel , Paraná, Brazil, 25º32’S, 48º19’W, coll. VII/1992GoogleMaps  by C. Manso; ZUEC 02322View Materials (04 specimens)  , ZUEC 02325View Materials (02 specimens), Matinhos Paraná, Brazil, 25º50’– 25º53’S, 48º26’– 48º32’W, collGoogleMaps  . V /2014 by M.L. Bueno & P. Guilherme; UFBA 00601 (01 specimen), Santa Catarina, 27º35’S, 48º32’W, coll. IV/2007GoogleMaps  by P. Guilherme, Y. Tavares & G. Silvério.

Type locality. Salvador, Bahia, Brazil.

Etymology. The specific name alludes to the Brazilian type locality.

Diagnosis. Disc (interradial regions) covered by short spines with 2–6 thorns at the apex; radial shields triangular, with uniform coverage of short bifid and trifid spines; ventral arm plates square shaped, with straight proximal edge and concave distal edge.

Holotype description. A specimen with 6.55 mm of disc diameter. Five arms, 3–4 times as long as the disc diameter. Disc circular, 2.6 mm high, dorsal surface covered covered by small, rounded and imbricated scales that support short and hyaline spines, with 2–6 thorns at the apex. Central and radial primary plates not visible ( Figs. 6View FIGURE 6 A–D). Radial shields flat, scalene triangular, longer than wide, proximal edges tapered and distally rounded, separated by 1–2 elongated scales, covered by small bifid and trifid spines ( Fig. 6EView FIGURE 6). Ventral interradius covered by imbricated scales with small bifid and trifid spines. Genital plates at the base of arms. Oral shields lozenge-shaped, as long as wide, with tapered proximal edge and rounded distal and lateral edges. Madreporite wider than other oral shields and circular in shape. Adoral shields triangular, tapered proximal to oral shields and distally extending around the oral shields. With cluster of dental papillae on the apex of jaw and covering at least helf the height of the dental plate. Infradental papilla and oral papillae absent Oral tentacle pore visible ( Fig. 6DView FIGURE 6). Arms dorsoventrally compressed, tapering gradually toward arm tip. Dorsal arm plates lozenge-shaped, with elongated proximal edge, as long as wide, with longitudinal black and white stripes ( Figs. 6G, IView FIGURE 6). Ventral arm plates square, with straight proximal edge and distally concave ( Figs. 6H, JView FIGURE 6). Lateral arm plates cover part of the dorsal arm surface; bearing 8–10 vitreous arm spines proximally and 6–8 distally, the second upper spine is the longest ( Fig. 6JView FIGURE 6). Arm spines glassy, 2.5 cm long, with marginal spines and a crown of spines at the tip ( Fig. 7EView FIGURE 7); sometimes the lower spine modified into a hook. Arm spine articulation vertical, with two ridges slightly curved, opening at both ends, surrounding two circular openings with similar size ( Fig. 7EView FIGURE 7). One spiniform tentacle scale. Arm vertebrae with zygospondylus articulation, with a dorsal keel extending distalwards into a large groove on the proximal face of the following vertebra. Zygocondyles dorsalwards converging and zygosphene fused with a pair of zygocondiles ( Figs. 7View FIGURE 7 A–D).

Variations. The disc of Ophiothrix brasiliensis  n. sp. varies in shape from circular to pentagonal. The dorsal arm plates also vary from lozenge to fan-shaped. The coverage of the radial shields is not uniform and can be sparse and dense in different regions of the disc of the same individual.

Color pattern. Ophiothrix brasiliensis  n. sp. commonly have disc purple colored, with black and white stripes along the entire extension of the arms. Also, eventually white spots are seen in dorsal arm plates.

Remarks. Most of the specimens here assigned to O. brasiliensis  n. sp. were previously attributed to O. angulata  . However, interradial spines of O. brasiliensis  n. sp. have 2–6 thorns at the apex while those of O. angulata  are bifid or trifid. Also, the ventral arm plates of O. brasiliensis  n. sp. are wider than long, with straight proximal edge and distally concave, whereas those of O. angulata  are heart-shaped.

Guille & Albuquerque (1987) and Albuquerque & Guille (1991), based on the same specimen from Espírito Santo, misidentified O. brasiliensis  n. sp. as O. ailsae  . Ophiothrix ailsae  was described by Tommasi (1970) based on a single specimen from Vitória Island (São Paulo State, Brazil) and was characterized by the presence of red bands of pigmentation on the arms and the disc covered only by trifid spines. Ophiothrix  specimens studied by Guille & Albuquerque (1987) and Albuquerque & Guille (1991) are deposited at MZUSP and were analyzed here. However, all individuals have discs covered by spines with 2–6 thorns at the apex, thus differing from the diagnostic character provided by Tommasi (1970). Moreover, these specimens fit all other morphological features of O. brasiliensis  n. sp., being here reassigned to this new species. Also, the unique specimen from Brazil (Rio de Janeiro) attributed to O. brachyactis ( Oliveira et al. 2010)  is here reassigned to O. brasiliensis  n. sp. due to the coverage of the disc (with spines in O. brasiliensis  n. sp. and with granules in O. brachyactis  ; see Discussion).

Ophiothrix brasiliensis  n. sp. can be distinguished from all species of Ophiothrix  by the combination of short spines with 2–6 thorns at the apex covering the interradial regions of the disc and short bifid and trifid spines, covering the radial shields.

Distribution. Western Atlantic: Brazil (Pará, Maranhão, Piauí ,, Ceará, Rio Grande do Norte, Paraíba, Pernambuco, Alagoas, Bahia, Espírito Santo, Rio de Janeiro, São Paulo, Paraná, Santa Catarina and Rio Grande do Sul).

T

Tavera, Department of Geology and Geophysics

V

Royal British Columbia Museum - Herbarium

Kingdom

Animalia

Phylum

Echinodermata

Class

Ophiuroidea

Order

Ophiurida

Family

Ophiotrichidae

Genus

Ophiothrix

Loc

Ophiothrix brasiliensis

Santana, Alisson, Manso, Cynthia L. C., Almeida, Ana C. S. & Alves, Orane F. S. 2020
2020
Loc

Ophiothrix (Ophiothrix) angulata:

Tommasi, L. R. 1970: 60
Loc

Ophiothrix ailsae:

Guille, A. & Albuquerque, M. N. 1987: 147
Loc

Ophiothrix ailsae:

Albuquerque, M. N. & Guille, A. 1991: 9
Loc

Ophiothrix angulata:

Borges, M. & Monteiro, A. M. G. & Amaral, A. C. Z. 2002: 59
Loc

Ophiothrix angulata:

Borges, M. 2005: 66
Loc

Ophiothrix angulata:

Manso, C. L. C. & Alves, O. F. S. & Martins, L. R. 2008: 194
Loc

Ophiothrix (Ophiothrix) angulata:

Viana, F. S. 2010: 14
Loc

Ophiothrix brachyactis:

Oliveira, J. P. & Oliveira, J. & Manso, C. L. C. 2010: 8
Loc

Ophiura angulata

Say, T. 1825: 146
Loc

Ophiothrix brachyactis Clark, 1915: 269–270

Clark, H. L. 1915: 270
Loc

Ophiothrix ailsae

Tommasi, L. R. 1970: 61