Yapacana, Pinto-da-Rocha, 1997

Villarreal, Osvaldo, Kury, Adriano B. & Colmenares, Pío A., 2021, Contributions to the taxonomy of some Amazonian Stygnidae (Opiliones Laniatores: Gonyleptoidea), Zootaxa 4984 (1), pp. 218-227: 223

publication ID

https://doi.org/10.11646/zootaxa.4984.1.17

publication LSID

lsid:zoobank.org:pub:05DC27A9-9E01-424E-8F27-1F139E484324

DOI

http://doi.org/10.5281/zenodo.4926970

persistent identifier

http://treatment.plazi.org/id/03EC879F-FFED-FFE0-FF77-8145FDF0B4E5

treatment provided by

Plazi

scientific name

Yapacana
status

 

Yapacana   Pinto-da-Rocha, 1997

Yapacana   Pinto-da-Rocha 1997: 14. Type-species by original designation: Yapacana tibialis   Pinto-da-Rocha, 1997.

Diagnosis. Interocular region unarmed ( Y. tibialis   ) or with a high spine. MS-A with 4–5 pair of setae, instead 3–2 as normally present in Stygnidae   ; stylus curved, not surpassing the distal border of the LP; MS-E1 reduced and MS-E2 large.

Included species. Yapacana tibialis   Pinto-da-Rocha, 1997; Y. ianomami ( Pinto-da-Rocha & Tourinho, 2012)   comb. nov.; Y. neblina ( Pinto-da-Rocha & Tourinho, 2012)   comb. nov. and Y. tapirapeco ( Pinto-da-Rocha & Tourinho, 2012)   comb. nov.

Remarks. The three species here proposed as new combinations present a genital morphology similar to Yapacana tibialis   ( Figs 3J–L View FIGURES 3 ) and not to the Stygnoplus   pattern ( Figs 3G–I View FIGURES 3 ). (1) The lamina parva is not reduced and the “neck” is of normal length (not conspicuously short) and not especially narrow ( Figs 3J, L View FIGURES 3 ), (2) MS-C are normally sized ( Figs 3J–L View FIGURES 3 ), (reduced in Stygnoplus   ) ( Figs 3G–I View FIGURES 3 ) (3) MS-A 4-5 instead 3 pairs ( Fig. 3K View FIGURES 3 ); (4) MS-E normally present, with at least MS-E2 large ( Figs 3J–L View FIGURES 3 ) (in Stygnoplus   , both MS-E1–E2 are extremely reduced or even apparently absent ( Figs 3G–I View FIGURES 3 ). Unlike the type species of the genus, the species here addressed all have a high spine in the carapace in the interocular region.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Opiliones

Family

Stygnidae

Loc

Yapacana

Villarreal, Osvaldo, Kury, Adriano B. & Colmenares, Pío A. 2021
2021
Loc

Yapacana

Pinto-da-Rocha, R. 1997: 14
1997