Trochanteria gomezi Canals, 1933

Pompeo, Jennifer Nunes, Brescovit, Antonio Domingos & Araujo, Douglas, 2023, Taxonomic notes, distribution update and the first chromosomal analysis of Vectius niger (Simon, 1880) and Trochanteria gomezi Canals, 1933 (Araneae: Trochanteriidae), Zootaxa 5374 (2), pp. 229-244 : 237-240

Trochanteria gomezi Canals, 1933

Figs 4–7

Trochanteria gomezi Canals, 1933: 234 , figs 1–6 (Male holotype from Olta, La Rioja, Argentina, deposited in MACN, not examined); Azevedo et al., 2018: 599, fig. 15e.

Oltacloea major Mello-Leit „o, 1942: 404, f. 28 (Female syntype from Colonia Dora , Santiago del Estero, Argentina, in MNRJ, examined before the 2018 fire); Platnick, 1986: 32, figs 1–9, 14–17 (Syn.).

Material examined. BRAZIL. Roraima: Boa Vista, Universidade Federal de Roraima, Campus de Cauamé (02°52’38.4’’N 60°43’13.1’’W), 2 ♁ 6♀ 9 imm. (CHNUFPI 1307); 1♁ (CHNUFPI 1571); 1♁ ( UFMG 15584 ) ; 1♀ ( UFMG 15954 ) ; 1♀ ( UFMG 15955 ) ; 1♀ ( UFMG 15956 ) ; 2♁ 8♀ 8 imm. ( UFMG 17087 ) ; 1♁ ( IBSP 258676 ) ; 2♀ ( IBSP 258677 ) ; all collected in 22–24/VII/2014 by L.S. Carvalho, M.C. Schneider; Piauí: Piracuruca, Parque Nacional de Sete Cidades (4◦ 5`39,9”S 41°43`53,3”W) , 1♀ (CHNUFPI 0205); 1♀ (CHNUFPI 0206); 1♀ (CHNUFPI 0209); 1♀ (CHNUFPI 0211); 1♀ (CHNUFPI 0212); 1♀ (CHNUFPI 0214); 1♀ (CHNUFPI 0215); 1♀ 2 imm. (CHNUFPI 0221), all collected in 03–05/V/2011 by L.S. Carvalho et al.; Guaribas, Parque Nacional da Serra das Confusões (9◦13`32”S 43°27`47”W), 9–15/XII/2010, L.S. Carvalho col., 1♀ ( UFMG 14502 ) ; Minas Gerais: Uberlândia (18°55′8″S 48°16′37″W), 10/I/2001, E.Q. Garcia col., 1♀ ( IBSP 62437 ) ; Uberlândia, Estação Ecológica do Panga (19º10’10”S 48º23’30”W), IV/2005 – II/2006, M.F. Mineo col., 1♁ ( IBSP 97337 ) ; Mato Grosso do Sul: Campo Grande, Reserva Particular do Patrimônio Natural da Universidade Federal do Mato Grosso do Sul ( RPPN-UFMS) (20°30’S 54°36’W) , 1♀ ( IBSP 271320 ); 1 imm. ( IBSP 271328 ); 1 imm. ( IBSP 271330 ); 1 imm. ( IBSP 271335 ) , all collected in 19/XI/2020 by J. Nunes; ARGENTINA. Santiago del Estero, IV.1957, Golboch col. ( MCN 21062 ) .

Other material cited in literature ( Platnick, 1986): Argentina. La Rioja: La Rioja (29°24′47″S 66°51′21″W), 1♁; Olta (30°37’52”S 66°15’47”W), 1♁ 1♀ ; Santiago del Estero: Colonia Dora (28°36’S 62°57’W, 1♁; Paraguay. Filadelfia, Nueva Asuncion (currently Boquerón, 21°31’S 60°42’W), 10 km North Pico, 1♀.

Diagnosis. Females of Trochanteria gomezi differ from other species by the very short lateral epigynal margins (see Platnick 1986, fig. 14). Males of other Trochanteria species are unknown, but it can be recognized by the presence of proximal projection of the base of the retangular embolus and elongated and conical tegular projection, distally in the tegulum in the male palp ( Fig. 4C–E ; Platnick 1986, figs. 16–17).

Description. Male and female described by Platnick (1986). We include: male with chelicerae with one retromarginal teeth ( Fig. 4A ); cymbium with rounded and smooth tarsal organ ( Fig. 4B ); palp in detail showing flattened embolar base, acute embolar base with proximal projection, conical and apical tegular projection, curved and short median apophysis and acute retrolateral tibial apophysis with enlarged base ( Fig. 4 C−F). Female: chelicerae with two teeth spaced at the promargin ( Fig. 5 A−B), pedipalp claw with one teeth ( Fig. 5C ), epigynum with narrow atrium, subtriangular epigynal median field and halfmoon epigynal lateral field ( Fig. 4D ).

Natural History. All the specimens used for cytogenetic studies were found hidden in crevices of the tree bark of Curatella americana Linnaeus , during the day, and collected afterremoving parts of the tree bark (Fig. 6).

FIGURA 6. A−C, Vectius niger . A female hidden in tree bark, dorsal view, B female, dorsal view, C Egg sac under tree bark. D Trochanteria gomezi Canals, 1933 , dorsal view.

Distribution. Northwestern Argentina, Paraguay and Brazil ( Fig 7 ).

Figures

FIGURE 4. Trochanteria gomezi Canals, 1933, male. A chelicera, ventral view, B tarsal organ, cymbium of palp C–F palp, C ventral view, D same, detail, E retro-ventral view, detail F retrolateral view. Abbreviations: C, cymbium; EB, embolar base; EPP, embolar base proximal projection; MA, median apophysis; RTA, retrolateral tibial apophysis; T, tegulum; TP, tegular projection.

FIGURE 5. Trochanteria gomezi Canals, 1933, female. A–B chelicerae, A ventral view, B same, detail of teeth, C pedipalp, claw, D epigynum, ventral view. Abbreviations: A, atrium; ELF, spigynal lateral field; EMF, epigynal median field.

FIGURE 7. Geographical distribution of Trochanteria gomezi Canals, 1933, in the Neotropical region. The grey area indicates the country Brazil.