Meri yaciba, Rheims & Jäger, 2022

Rheims, Cristina A. & Jäger, Peter, 2022, Revalidation of the genus Sadala Simon, 1880 with the description of a new genus of Neotropical huntsman spiders (Araneae, Sparassidae), Zootaxa 5135 (1), pp. 1-80 : 73-74

publication ID

https://doi.org/10.11646/zootaxa.5135.1.1

publication LSID

lsid:zoobank.org:pub:0CC0D586-E099-4593-9032-EA1885F00F3B

DOI

https://doi.org/10.5281/zenodo.6550553

persistent identifier

https://treatment.plazi.org/id/039787EF-FFE9-C947-FF32-FBE9FCE4FF3A

treatment provided by

Plazi

scientific name

Meri yaciba
status

sp. nov.

Meri yaciba sp. nov.

Figs 297–308 View FIGURES 297–303 View FIGURES 304–308 , 317 View FIGURES 315–318

Type material. Holotype: VENEZUELA: Amazonas: ♂, Rio Yaciba [1.2333, ‑66.7333], 3 December 1953 ( AMNH) GoogleMaps . Paratype: VENEZUELA: Amazonas: 1♀, same locality as holotype, Igarapé, 7 December 1953, W.M. Beebe leg. ( AMNH) GoogleMaps .

Etymology. The specific name refers to the type locality; noun in apposition.

Diagnosis. Males of M. yaciba spec. nov. resemble those of M. pictitarsis ( Figs 221–224 View FIGURES 221–224 ) by the palp with RTA with a ventral branch ( Fig. 298 View FIGURES 297–303 ). They are distinguished from the latter species by RTA distally pointed with ventral branch roughly three times longer than wide ( Fig. 288–289 View FIGURES 285–291 ) and embolus with subdistal projection hook-shaped ( Fig. 300 View FIGURES 297–303 ) (RTA distally blunt with ventral branch triangular, slightly longer than wide and embolus with subdistal projection long, mediad and laminar in M. pictitarsis ). Females resemble those of M. pictitarsis comb. nov. ( Figs 225–227 View FIGURES 225–230 ) by the epigyne with MS widest anteriorly, partly covering LL and EP triangular. They are distinguished by the MS with posterior margin anterior to that of LL and EP more than 1.5 times longer than wide (MS with posterior margins in line with posterior margin of LL and EP slightly longer than wide in M. pictitarsis comb. nov.).

Description. Male (holotype): Total length 11.7. Prosoma 5.2 long, 4.5 wide. Opisthosoma 6.0 long, 3.0 wide. Eyes: diameters: 0.46, 0.40, 0.30, 0.35; interdistances: 0.20, 0.05, 0.45, 0.45, 0.27, 0.18. Legs: I: 29.9 (8.0, 2.9, 8.4, 8.4, 2.2); II: 32.3 (9.0, 2.9, 9.2, 8.9, 2.3); III: 21.5 (6.2, 2.2, 5.9, 5.5, 1.7); IV: 7.7, 2.1, 6.8, 6.9, 2.0). Palp: PTA trapezoid, roughly 2 times wider than long; RTA roughly 1.5 times longer than wide; cymbium with small retroproximal projection; subtegulum visible betwee 9–11:30 o’clock in ventral view; tegulum depressed close to conductor; conductor roughly the same width throughout; embolus curving subdistally ( Figs 297–300 View FIGURES 297–303 , 304–306 View FIGURES 304–308 ).

Female (paratype): Prosoma 6.0 long, 5.2 wide. Opisthosoma destroyed. Eyes: diameters: 0.50, 0.40, 0.30, 0.38; interdistances: 0.30, 0.30, 0.70, 0.61, 0.30, 0.25. Legs: I: 26.1 (7.2, 3.0, 7.0, 6.9, 2.0); II: 29.0 (8.0, 3.1, 8.0, 7.9, 2.0); III: 20.3 (6.0, 2.6, 5.0, 5.1, 1.6); IV: absent. Epigyne (broken anteriorly): MS as wide as long with lateral margins diverging anteriorly; HP triangular, opening at posterior margin of MS ( Figs 301 View FIGURES 297–303 , 307 View FIGURES 304–308 ). Vulva: internal ducts with FW C-shaped, mediad; GP longer than wide, antero mediad; SP rounded; FD antero mediad ( Figs 302–303 View FIGURES 297–303 , 308 View FIGURES 304–308 ).

Distribution. Only known from the type locality ( Fig. 317 View FIGURES 315–318 ).

AMNH

American Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Sparassidae

Genus

Meri