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
Nagada
Lowry & Stoddart, 1995
(
Fig. 26
)
Nagada
Lowry & Stoddart, 1995b: 146
.—
Lowry & Stoddart, 2003: 283
.
Type
species.
Nagada uwedoae
Lowry & Stoddart, 1995
, by original designation.
Included species.
Nagada
includes three species:
N. garagassi
Lowry & Stoddart, 1995b
;
N. papua
Lowry & Stoddart, 1995b
;
Nagada uwedoae
Lowry & Stoddart, 1995b
.
Diagnostic description.
Antenna 1 peduncle without posterodistal lobe or spine; accessory flagellum with an elongate article 1 (at least twice as long as article 2) partially covering callynophore. Antenna 2 without brush setae.
Mandible
incisors large, convex; left lacinia mobilis a cuspidate peg;
molar a setose tongue
. Maxilla 1 outer plate setal-teeth a well developed 7/4 crown. Maxilla 2, inner plate significantly shorter than outer.
Gnathopod 1 simple
; coxa large, about as large as coxa 2 with a straight anterior margin; ischium long (length 2 × to 4 × breadth); carpus long (length 2 to 4 × breadth), dactylus with or without complex spines on posterior margin. Uropod 2 inner ramus constricted. Uropod 3 outer ramus article 2 long.
Telson entire
.
Remarks.
Based on simple first gnathopod with long ischium and an entire telson
Nagada
is similar to
Eclecticus
. Both genera have the mandibular palp attached midway, both have a well developed 7/4 crown on the outer plate of maxilla 1, and both have a long ischium on the first gnathopod. They differ mainly in the dactylus of gnathopod 1 which has an explosion of complex setae on the anterior margin in
Eclecticus
.