Gennadas pasithea, DE MAN, 1907

Lunina, Anastasia A., Kulagin, Dmitry N. & Vereshchaka, Alexander L., 2019, A hard-earned draw: phylogeny-based revision of the deep-sea shrimp Bentheogennema (Decapoda: Benthesicymidae) transfers two species to other genera and reveals two new species, Zoological Journal of the Linnean Society 187, pp. 1155-1172 : 1166

publication ID	8E5AF5B-D417-4819-B210-94807CC8F6BE
publication LSID	lsid:zoobank.org:pub:8E5AF5B-D417-4819-B210-94807CC8F6BE
DOI	https://doi.org/10.5281/zenodo.14829419
persistent identifier	https://treatment.plazi.org/id/03BE3272-FFF8-FF8D-2CFE-1587FEE5FF03
treatment provided by	Plazi
scientific name	Gennadas pasithea
status

Treatment

GENNADAS PASITHEA DE MAN, 1907 View in CoL

( FIGS 3 KL, 4D)

Type material: Female, carapace length 8 mm, ZMA. CRUDS.D.102591, ‘Siboga’, St. 230, 03°58’ S, 128°20’ E, 0-2000 m (holotype); male, carapace length 11 mm, ZMA. CRUDS.D.102591, ‘Siboga’, St. 230, 03°58’ S, 128°20’ E, 0-2000 m (paratype) GoogleMaps .

Material examined: Nine females and eight males (details in Supporting Information, Appendix S1).

Type locality: Equatorial Indian Ocean, 03°58’ S, 128°20’ E.

Emended diagnosis: Integument membraneous; rostrum not reaching distal corneal margin, armed with one apical and one dorsal tooth; carapace with developed branchiostegal spine set on anterior margin, hepatic spine absent; pleon with first to fifth somites dorsally rounded and sixth somite dorsally carinate; telson posteriorly truncate, with a single pair of apical spines, dorsolateral spines absent. Eyestalks with long tubercle. First maxilliped with exopod not segmented distally; fourth and fifth pereopods with dactyl slender, not articulated. Petasma ( Fig. 4D) subrectangular, LA and grasping structure present, PM and PE entire. Thelycum ( Fig. 3K, L): S6 subtriangular, bearing setose shield directed forward; S7 divided, AS 7 as two subtriangular protrusuions with sharp anterior angles, PS as long chitinized strip, laterally produced beyond coxae, with two groups of lateral setae in addition to two groups of sublateral setae, coxae with long setose protuberances; S8 with setose shield directed forward.

Geographical distribution: The type material and the examined material from the Dana Expeditions derive from a narrow strip between 12° S and 4° N and 56° E and 138° E in the Indian Ocean and the West Pacific. This species is probably associated with the Equatorial waters of this region; records from other oceanic areas (e.g. Pérez Farfante & Kensley, 1997) may be a result of misidentification due to an incomplete original description GoogleMaps .