Eutichurus madre Bonaldo, 1994

Bonaldo, Alexandre B., Lise, Arno A., Ramírez, Martín J. & Saturnino, Regiane, 2018, Revisiting the spider genus Eutichurus Simon, 1897 (Araneae, Eutichuridae): new species and complementary descriptions, Zootaxa 4382 (2), pp. 321-346 : 333-334

Eutichurus madre Bonaldo, 1994

Figs 23 ̄26, Map 1

Eutichurus madre Bonaldo, 1994: 129 , fig. 79. Female holotype from Peru, Madre de Dios, Zona Reservada Tambopata, Laguna Chica , 290 m, 12°50’S 69°17’W, 01.VI.1988, D. Silva leg ( MUSM, not re-examined).

Diagnosis. Males of E. madre resemble those of E. paredesi n. sp. and E. marquesae by the MA with a long, retrolaterally directed median prong ( Figs 1 , 27 ) but can be distinguished from the former by the presence of an embolar prolateral process and from the later by that process being inserted sub-apically ( Figs 23 , 24). Females share with those of E. marquesae the relatively small epigynal anterior projections, presenting a semi-circular sclerotized area at its inner margin, and posterior plates projected anteriorly over the median field ( Fig. 52 ; Bonaldo 1994: fig. 80). They differ by the larger semi-circular sclerotized area on the anterior projections, which are projected over the posterior plates ( Bonaldo 1994: fig. 79).

Description. Male (MPEG 21927). Colour in ethanol: carapace brownish red, cephalic region darker, thoracic groove mark reddish. Chelicerae, endites and labium brownish red. Sternum orange with brown margins. Legs yellow. Chelicerae with 4 promarginal teeth, the third the largest, the first a denticle; and 4 closely placed retromarginal teeth. Tarsi III–IV with dense scopulae, metatarsi III–IV with moderate scopulae. Total length 10.1. Carapace 5.0 long, 3.8 wide. Eye diameters: AME 0.28, ALE 0.27, PME 0.24, PLE 0.26. Eye interdistances: AME–AME 0.29, AME–ALE 0.31, PME–PME 0.40, PME–PLE 0.55, AME–PME 0.30, ALE–PLE 0.10, clypeus AME 0.17, clypeus ALE 0.17. Leg and palp measurements: palp 5.4 (2.0, 0.6, 1.2, -, 1.6); leg I missing; leg II missing; leg III 13.4 (3.7, 1.6, 3.0, 3.6, 1.5); leg IV 19.6 (4.8, 1.9, 3.9, 5.0, 1.7). Spination: palp femur: d 0-1-1; tibia p 2-0. Leg. I absent. II—absent. III—femur d 1-1-0, p 0-d1-d1, r 0-d1-d2; tibia d 0, p 2-1, r 1-1, v 2-2 -2; metatarsus d p1r1-p1r1-p1r1, p 0-0-1, r 0-0-1, v 2-2 -1. IV—femur d 1-1-0, p 0-d1-d1, r 0-0-d1; tibia d 0, p 1-1, r 1- 1, v 2-2 -2; metatarsus d p1r1-p1r1-p1r1, p 0-0-1, r 0-0-1, v 2-2 -1. Palp: tibia thin, long, almost the same length of cymbium; RTA excavated, projected retrolaterally. Tegular process absent; MA apically placed, median prong large; conductor hyaline. Embolus inserted sub-basally; embolus long, thin, base rounded, prolateral process hyaline, apices hook-shaped ( Figs 23 ̄25).

Female. Described by Bonaldo (1994: 129). Complementary description: vulva composed by large primary spermathecae with short fertilization ducts; secondary spermathecae inconspicuous (Fig. 26).

Distribution. Southeastern Peru and Brazilian Amazonia (Map 1).

New Records. PERU. Madre de Dios: Cuenca Rio Los Aruegos—CICRA, 1 female ( UNALM 787 ), 28.IX.2005, M. Deza leg. ; 1 male (UNALM 793), 29.X.2005; Zona Reservada Pakitza , 11°56’S 71°17W, 356 m, 1 male (MUSM-Ent 504414), 11.V.1991, D . Silva leg; Cusco, La Convención, Echarate, C.N. Monte Carmelo , 12°26’S 72°59’W, 1370 m, 1 male (MUSM-Ent 503623), 30.IX.2010, J . Peralta leg. BRAZIL. Pará: Juruti [02°09’47.00”S 56°05’43.5”W], 1 male ( MPEG 21927 ) ; Amazonas: Humaitá, Reserva Extrativista Humaitá [07°31’1.00”S 63°01’47.3”W], 1 male ( IBSP 7161 ) .

Figures

FIGURES 1¯3. Eutichurus paredesi new species. Male: 1 palp, ventral view; 2 embolus, prolateral view; 3 palp, retrolateral view.Abbreviations: aMA—apices of MA; apMA—apices of median prong of MA; MA—median apophysis.Scale bar = 0,25 mm.

FIGURES 23¯26. Eutichurus madre Bonaldo, 1994. Male: 23 palp, ventral view; 24 embolus, prolateral view; 25 palp, retrolateral view.Female:26 epigynum, dorsal view.Scale bar = 0,25 mm.

FIGURES 27¯29. Eutichurus marquesae Bonaldo, 1994. Male: 27 palp, ventral view; 28 embolus, prolateral view; 29 palp, retrolateral view.Scale bar = 0,25 mm.

FIGURES 52¯57. Eutichurus marquesae Bonaldo, 1994. Female: epigynum, 52 ventral view; 53 posterior view; 54 dorsal view; 55 dorso-lateral view; 56 dorso-anterior view; 57 cuticular glands. Abbreviatures: AP—anterior projection of lateral lobe; CD—copulatory duct; CG—cuticular gland; FD—fertilization duct; MF—median field; PP—posterior plate of lateral lobe; S1—primary spermathecae; S2—secondary spermathecae; SS2—stalk of S2.