Callibaetis (Abaetetuba) fasciatus ( Pictet) 1843

Cruz, Paulo Vilela, Salles, Frederico Falcão & Hamada, Neusa, 2017, Four new species of Callibaetis Eaton (Ephemeroptera: Baetidae), nymphal description of Callibaetis (Abaetetuba) fasciatus (Pictet) and keys for South American species of Callibaetis, Zootaxa 4250 (3), pp. 229-261: 235-240

publication ID

https://doi.org/10.11646/zootaxa.4250.3.3

publication LSID

lsid:zoobank.org:pub:8D0213F2-B5F7-4CFB-BB3E-637EB6EDB684

persistent identifier

http://treatment.plazi.org/id/BC7B8E32-FFBE-FFC3-60C5-FE3DCFAF8E1B

treatment provided by

Plazi

scientific name

Callibaetis (Abaetetuba) fasciatus ( Pictet) 1843
status

 

Callibaetis (Abaetetuba) fasciatus ( Pictet) 1843  

( Figs 5–8 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 )

Cloe fasciata Pictet 1843: 262   .

Callibaetis trifasciatus Esben-Petersen 1912: 339   . (syn. by Gillies 1990) Callibaetis fasciatus: Eaton 1883: 197   ; Gillies 1990: 23; Domínguez et al. 2006: 113; Cruz et al. 2014: 20.

Known stages. Male and female imagoes, nymph

Diagnoses. Male imago: 1) turbinate eyes with oval dorsal portion ( Fig. 5 View FIGURE 5 A); 2) dorsal portion of turbinate eyes, in lateral view, without constriction; 3) turbinate portion of compound eyes (in lateral view) with anterior and posterior margins divergent; 4) forewing with three or four transverse pigmented bands ( Fig. 5 View FIGURE 5 F); 5) marginal intercalary veins paired ( Fig. 5 View FIGURE 5 F); 6) hind wing with small dashes of pigmentation ( Fig. 5 View FIGURE 5 G); 7) hind wing with a small pointed costal projection ( Fig. 5 View FIGURE 5 G); 8) marginal intercalary veins on hind wing present ( Fig. 5 View FIGURE 5 G); 9) anterior margin of abdominal terga with a transversal mark ( Fig. 5 View FIGURE 5 A); 10) abdominal sterna with strongly pigmented medioanterior and medioposterior sigilla ( Fig. 5 View FIGURE 5 B); 11) forceps segment I wide at base (Fig. 57 in Cruz et al. 2014); 12) segment III of forceps elongated and oval (Fig. 57 in Cruz et al. 2014).

Female imago: 1) forewing with three or four transverse bands of pigmentation ( Fig. 5 View FIGURE 5 H); 2) marginal intercalary veins paired; 3) hind wing with small dashes of pigmentation ( Fig. 5 View FIGURE 5 I); 4) hind wing with a small pointed costal projection ( Fig. 5 View FIGURE 5 I); 5) marginal intercalary veins on hind wing present ( Fig. 5 View FIGURE 5 I); 6) abdominal sterna with strongly pigmented medioanterior and medioposterior sigilla ( Fig. 5 View FIGURE 5 D); 7) abdominal sterna I –IX with one pair of lateral black mark ( Fig. 5 View FIGURE 5 D).

Mature nymph: 1) distal margin of labrum with short, robust and pectinate setae medially ( Fig. 6 View FIGURE 6 B); 2) maxillary palp 1.3× length of galea-lacinia ( Fig. 6 View FIGURE 6 E); 3) one row of setae on basal part of inner-dorsal row of maxilla ( Figs 6 View FIGURE 6 E and similar to 21C); 4) paraglossa with rounded apex ( Fig. 6 View FIGURE 6 G); 5) paraglossa with one tuft of thin setae ( Fig. 6 View FIGURE 6 G); 6) inner margin of labial palp segment III not tapering towards the base ( Fig. 6 View FIGURE 6 G); 7) metanotum without spines; 8) anterior surface of foretarsus with one row stout setae ( Fig. 7 View FIGURE 7 A).

Description. Mature nymph. Length: body, 6.5 mm; cerci, 2.54 mm; paracercus, 2.35 mm (n=1). Head light brownish yellow; turbinate portion of male compound eyes yellowish brown. Antenna with spines and thin setae on flagellum ( Fig. 6 View FIGURE 6 A). Labrum ( Fig. 6 View FIGURE 6 B) maximum length about 1.3× minimum length; anterolateral margins with long and stout setae; distal margin with short, robust and pectinate setae medially; dorsal surface with numerous long and thin setae; dorsal surface, near distal margin, with three robust and long setae; distal margin with one row of stout setae ventrally; ventral surface with short and stout setae near lateral margin. Right mandible ( Fig. 6 View FIGURE 6 D) with 4+3 denticles; margin between prostheca and mola convex; basal half with short and thin setae and pores scattered over dorsal surface. Left mandible ( Fig. 6 View FIGURE 6 C) with 4+3 denticles; margin between prostheca and mola straight; basal half with short, thin setae and pores scattered over dorsal surface. Lingua of hypopharynx ( Fig. 6 View FIGURE 6 F) with apical lobe covered with small setae; short and thin setae scattered over distal margin of lingua and superlingua. Maxilla ( Fig. 6 View FIGURE 6 E) with one row of setae on basal part of inner-dorsal row (similar to Fig. 21 View FIGURE 21 C); medially, on inner margin, with 1+6 stout setae. Maxillary palp short, 1.3× length of galea-lacinia; palp segment II 1.2× length of segment I; outer margin of segment I covered with long and thin setae; inner margin of segment II with thin setae. Labium ( Fig. 6 View FIGURE 6 G) with glossae shorter in length than paraglossae; inner margin of glossae with 7 stout setae; apex with 3–5 long and stout setae; near outer margin with one row of long and stout setae; dorsal surface with one tuft of setae at apex. Paraglossae with rounded apex, with one row of stout setae and with one tuft of setae on inner margin; dorsal surface with numerous long and stout setae; distal margin with two rows of long and stout setae; outer margin with one row of long and stout setae. Labial palp with segment I 0.8× length of segments II and III combined; segment I with micropores; inner margin of segment II with four robust, short and stout setae, and few thin and short setae ( Fig. 6 View FIGURE 6 G); dorsally with row of six short and stout setae; inner margin of labial palp segment III not tapering towards the base; whole margin of labial palp segment III, on dorsal surface, with one row of long and stout setae; inner margin of labial segment III, on ventral surface, with four long and stout setae. Thorax light brownish yellow. Metanotum without spines ( Fig. 8 View FIGURE 8 B). Foreleg ( Fig. 7 View FIGURE 7 A) with black spots at base of femur; ratio 1.5:(0.62 mm):0.8:0.5. Forefemur length about 4.3× maximum width; dorsal margin with one row of short and stout setae; apex of femur with two stout setae; length of setae on dorsal margin about 0.1× maximum width of femur; ventral margin without setae; anterior and posterior surface covered with stout setae; near ventral margin with two rows of stout setae, one trifid and one simple; near dorsal margin with one row of stout setae. Ventral margin of tibia with one row of stout setae; anterior surface with one row of short and stout setae. Ventral margin of tarsus with one row of trifid stout setae ( Fig. 7 View FIGURE 7 C); anterior and posterior surface with one row of stout setae. Claw 0.7× length of tarsus. Hind leg similar to foreleg except femur without trifid setae and claw denticles smaller than foreclaw denticles ( Fig. 7 View FIGURE 7 B). Abdomen ( Fig. 8 View FIGURE 8 C) light brownish yellow. Posterior margin of terga with regular spines ( Fig. 8 View FIGURE 8 A). Surface of sterna with thin setae. Gill I about 1.5 × length of segment II, with two folds. Gill IV as long as length of segments V to VI combined, with two folds. Gill VII as long as length of segment VIII and half of segment IX combined, with one fold. Paraproct ( Fig. 8 View FIGURE 8 D) with 28 marginal spines; surface with micropores and short, thin setae. Paracercus ( Fig. 8 View FIGURE 8 G) with long spines every two segments. Cerci ( Figs 8 View FIGURE 8 E, 8F) with spines on all segments, basal half with long spines every two segments.

Comments. The nymph of C. (Ab.) fasciatus   is similar to the nymph of C. (Ab.) sellacki   , they can be distinguished by the absence, in C. (Ab.) fasciatus   , of spines on posterior margin of metanotum.

Material examined. Three male imagoes, BRAZIL, Rio Grande do Sul, Derrubadas , 27°15’58.76”S / 53°51’50.62”W, lake, 25.x.2008, E. Raimundi coll., INPA GoogleMaps   ; one male imago, BRAZIL, Paraná, Rio Branco do Sul, 25°11’42.20”S / 49°18’50.44”W, Gruta de Lancinha , 31.v.1987, DZRJ GoogleMaps   ; one male imago reared (with larval and subimaginal exuviae) and one nymph, BRAZIL, Mato Grosso do Sul, Bonito, Balneário municipal de Jardim Rio Prata , 21°25'04.3"S / 56°23'24.0"W, 15.iii.2012, P. V. Cruz coll., INPA GoogleMaps   ; three female imagoes, BRAZIL, Mato Grosso do Sul, Bonito, Ponte na BR-178, Rio Mimoso , 20°58'21.43"S / 56°32'49.74"W, 15.iii.2012, P. V. Cruz coll., INPA GoogleMaps   ; one male and one female imagoes, ARGENTINA, Prov. Corrientes, Parque Nacional Mburucuyá , casca central estancia, 12–14.xii.1999, C. Molineri coll.; three female and one male imagoes, ARGENTINA, Missiones, Parque Prov   . Uruguai, Uruzú, Ruta Prov. 19, 7-11.xii.1999, C. Molineri coll.; three female subimagoes ( C. trifasciatus   ), ARGENTINA, La Plata, 27.x.1920, Navás det., MZB   ; one male imago ( C. trifasciatus   ), ARGENTINA, Prov. Buenos Aires Navás det., MZB   .

Distribution. Argentina: Corrientes; Missiones; La Plata; Buenos Aires. Uruguay: Maldonado. Brazil: Rio Grande do Sul; Paraná; Mato Grosso do Sul.

INPA

Instituto Nacional de Pesquisas da Amazonia

MZB

Museum Zoologicum Bogoriense

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Ephemeroptera

Family

Baetidae

Genus

Callibaetis

Loc

Callibaetis (Abaetetuba) fasciatus ( Pictet) 1843

Cruz, Paulo Vilela, Salles, Frederico Falcão & Hamada, Neusa 2017
2017
Loc

Callibaetis trifasciatus

Cruz 2014: 20
Dominguez 2006: 113
Gillies 1990: 23
Esben-Petersen 1912: 339
Eaton 1883: 197
1912
Loc

Cloe fasciata

Pictet 1843: 262
1843