Chococtenus otongachi, Dupérré, Nadine, 2015

Dupérré, Nadine, 2015, Description of a new genus and thirteen new species of Ctenidae (Araneae, Ctenidae) from the Chocó region of Ecuador, Zootaxa 4028 (4), pp. 451-484 : 468-470

Chococtenus otongachi new species

Figs 33–37 , 57 .

Type material. Male holotype from Ecuador, Pichincha Province, La Unión del Toachi, Centro de Educación Ambiental Otongachi , 03.iv.2015, night collecting, E. Tapia ( QCAZ). One female paratype, same data ( QCAZ).

Additional material examined. Ecuador: Cotopaxi Province: San Francisco de Las Pampas (-00º25’005’’S - 78º55’00’’W), 01. iv. 2007, 1 ♀, 1500m, G. Onore ( QCAZ). Los Ríos Province: Centro Científico Río Palenque ( CCRP), Colección MAB, UNESCO, 29. xii.1990, 4 ♂, 24. xii.1980, 1 ♀, 27. xii.1990, 2 ♂1♀, Bosque primario, S. Sandoval ( QCAZ); 02. iii.1979, 1 ♂; 05. iii.1979, 2 ♂, Bosque 1 cuadrante abierto, T. DeVries ( QCAZ); Centro Científico Río Palenque ( CCRP), 15. ix.1979, 1 ♂3♀, T. DeVries ( QCAZ); Río Palenque, 05. ix.1976, 1 ♀ ( QCAZ); 24-27. ii.1977, 1 ♂1♀, 02. iii.1977, 1 ♂3♀, T. DeVries ( QCAZ); Centro Científico Río Palenque ( CCRP) (00º54’S 79º00W), 02. iii.1977, 1 ♂, 27. ii.1977, 1 ♀, ix.1976, 1 ♂1♀, 03. ix.1976, 2 ♂, 24. ii.1977, 1 ♂, 27. ii.1977, 3 ♂3♀, 02. ix.1977, 1 ♂, 04. iii.1979, 1 ♀, 02. ii.1977, 1 ♂2♀, 220m, T. DeVries ( QCAZ); 07. iii.1979, 1 ♂5♀; 16. ii.1980, 1 ♀, Bosque primario, S. Sandoval ( QCAZ); Centro Científico Río Palenque ( CCRP), 12. ix.1979, 3 ♂8♀, pitfall, cacao, S. Sandoval ( QCAZ). Pichincha Province: La Unión del Toachi, Centro de Educación Ambiental Otongachi , 10. ix.2013, 10 ♀, sifting litter, N. Dupérré, E. Tapia (DTC); xii.2012, 1 ♂, hand collecting, N. Dupérré (DTC); 27. xii.2014, 1 ♂5♀, sifting litter, N. Dupérré, E. Tapia (DTC); La Unión del Toachi (- 00.31383ºS - 78.95441ºW), 20.xi. 2003, 880m, 4♂ 1♀, malaise trap, G. Onore ( QCAZ). Santo Domingo de los Tsáchilas Province: Santo Domingo, 02. xi.1989, 1 ♂, G. Quezada ( QCAZ).

Etymology. The specific name is a noun in apposition taken from the type locality, Otongachi Biological Reserve.

Diagnosis. Males and females are diagnosed by their carapace colour pattern ( Fig. 33 ); furthermore they are distinguished from C. acanthoctenoides and C. miserabilis by their obvious smaller size. Males are distinguished from all species by the excavated membranous tegular process ( Fig. 34 ). Females are diagnosed by their small apex of median sector, from C. suffuscus by the medially positioned lateral processes ( Fig. 36 ).

Description. Male (holotype). Total length: 3.3; carapace length: 1.7; carapace width: 1.0; abdomen length: 1.6. COLORATION: Carapace yellow, sides blackish with pattern composed of blackish lines; pars cephalica light yellow apically; pars thoracica light yellow apically; fovea dark brown ( Fig. 33 ). Sternum light yellow, endites and labium light yellow. Chelicerae light brown with two black stripes. Abdomen dark brown with tinge of reddishbrown, with pale, half length median band, covered by long black setae, long white setae and spatulate white setae in cluster. Legs orange-brown, with two black bands on femora, tibiae and metatarsi. LEGS: Total length: I: 8.4; II: 8.0; III: 7.2; IV: 9.0. LEGS SPINATION: Femur I p1-1-1, r1-1-1; tibia I p1-1, r1, d1; metatarsus I p1-1, r1. Femur II p1-1-1-1, r1-1-1; tibia II p1-1, r1, d1-1; metatarsus II p1-1-1, r1-1. Femur III pl-1-1-1, r1-1-1-1; tibia III p1-1, r1- 1, d1-1, v2-2 -2; metatarsus III p1-1-1, r1-1-1, v2-2 -2. Femur IV pl-1-1-, r1; tibia IV p1-1, r1-1, d1, v2-2 -2; metatarsus IV p1-1-1, r1-1-1, v1-1 -1-1. GENITALIA: Palpal cymbial keel strong ( Fig. 34 ). Ventral tibial apophysis rounded, apically transparent, retrolateral tibial apophysis spine-like ( Figs 34, 35 ). Tegulum oval; median apophysis elongated, straight; conductor lamelliform, hyaline, folded apically; membranous tegular process hyaline, elongated, with apical dark spot and concave; embolus base not twisted; embolus thin, originating retrolaterally, tip elongated with a triangular pre-apical extension ( Fig. 34 ).

Female (paratype). Total length: 4.2; carapace length: 2.2; carapace width: 1.0; abdomen length: 2.0. COLORATION: As in male, slightly darker. LEGS: Total length: I: 7.3; II: 7.0; III: 6.9; IV: 8.0. LEGS SPINATION: Femur I p1-1-1, r1-1-1; tibia I p0, r0, d0; metatarsus I p0, r0. Femur II p1-1-1, r1-1-1-1; tibia II p1, r0, d0; metatarsus II p0, r0. Femur III pl-1-1-1, r1-1-1-1; tibia III p1-1, r1-1, d1-1, v2-2 -2; metatarsus III p1-1-1, r1- 1-1, v2-2 -1. Femur IV pl0, r1; tibia IV p1-1, r1-1, d1-1-1, v2-2 -2; metatarsus IV p1-1-1, r1-1-1-1, v2-2 -2-1. GENITALIA: Epigynum with elliptical median sector, apically with narrow unsclerotized sector, flat; lateral processes short, positioned medially ( Fig. 36 ). Internal genitalia with elongated and curved copulatory ducts; spermathecae oval with apico-lateral pore; fertilization ducts short ( Fig. 37 ).

Natural history. Most specimens where collected by sifting litter in a premontane evergreen forest at an altitude between 800–1300 m, other specimens were collected at the Centro Científico Río Palenque, at an elevation of 220 m in a lowland evergreen forest.

Distribution. Ecuador: Cotopaxi, Los Ríos and Santo Domingo de los Tsáchilas Provinces ( Fig. 57 ).

Figures

FIGURE 57. Map of Ecuador showing distribution records of the thirteen new species of the genus Chococtenus. The main collecting site, Otonga Biological Reserve (white box with x inside), holds 10 species (not found: C. suffuscus, C. otongachi and C. piemontana). Other known localities for: C. otonga (white lozenge), C. cappuccino (white x), C. lasdamas (white circle), C. suffuscus (white plus sign), C. otongachi (white rectangle) and C. piemontana (upside down white triangle).

FIGURES 33 – 37. Chococtenus otongachi new species. Male. 33 – 35. Female. 36, 37. 33. Carapace, dorsal view. 34. Palp, ventral view. 35. Palp, retrolateral view. 36. Epigynum, ventral view. 37. Internal genitalia, dorsal view.