A generic review of the lysianassoid family Uristidae and descriptions of new taxa from Australian waters (Crustacea, Amphipoda, Uristidae)
Author
Lowry, J. K.
Author
Kilgallen, N. M.
text
Zootaxa
2014
2014-09-26
3867
1
1
92
journal article
http://dx.doi.org/10.11646/zootaxa.3867.1.1
e5bb465f-e713-45c1-8e0f-2c6125494b44
1175-5326
5585734
B7C6EC5F-5AA3-43B1-BD3D-D8111E0EC3A7
Kyska
Shoemaker, 1964
(
Fig. 23
)
Kyska
Shoemaker, 1964: 391
.—J.L.
Barnard, 1969: 346
.—
Barnard & Karaman, 1991: 424
(key), 494.
Type
species.
Kyska dalli
Shoemaker, 1964
, original designation
Included species.
Kyska
includes one species:
K. dalli
Shoemaker, 1964
.
Diagnostic description.
Antenna 1 peduncle article 1 without anterodistal lobe; accessory flagellum forming cap covering callynophore. Antenna 2 with brush setae. Mandible molar a setose tongue. Maxilla 1 outer plate a well developed 7/4 crown. Maxilla 2 inner plate significantly shorter than outer plate.
Gnathopod 1 chelate
;
coxa 1 large, about as long as coxa 2, subrectangular with concave anterior margin
; ischium short (length less than 2 × breadth); carpus compressed; propodus margins tapering distally. Uropod 2 inner ramus not constricted.
Telson notched
.
Remarks.
Only three uristid genera (
Euonyx
,
Kyska
and
Stephonyx
) have chelate first gnathopods. Unlike
Kyska
,
Euonyx
and
Stephonyx
both have reduced vestigial coxae on gnathopod 1.
Based on the well developed coxa of gnathopod 1 with a concave anterior margin and a compressed carpus
Kyska
is similar to
Abyssorchomene
and
Koroga
.
Kyska
differs from both genera in the chelate first gnathopod, from
Koroga
in less well developed eyes and a deeply cleft telson (notched in
Koroga
) and from
Abyssorchomene
in the straight mandibular incisors (curved in
Abyssorchomene
) in the small setose molar and in the tapering margins of the gnathopod 1 propodus.
Distribution.
Arctic
. Alaskan endemic.