Memoirs of the Museum of Victoria 52(2): 311-318 (1991)
ISSN 0814-1827
KAMAKA TAD1TADI, A NEW MARINE SPECIES FROM PAPUA NEW GUINEA
(CRUSTACEA: AMPHIPODA: COROPHIOIDEA)
By James Darwin Thomas 1 and J. L. Barnard 2
'Reef Foundation, PO Box 569, Big Pine Key, Florida, 33043, USA
-NHB-163, Department of Invertebrate Zoology, Smithsonian Institution, Washington, DC, 20560, USA
Abstract
Thomas, J.D. and Barnard, J.L., 1991. Kamama taditadi, a new marine species from
Papua New Guinea (Crustacea: Amphipoda: Corophioidea). Memoirs of the Museum of
Victoria 52: 311-318.
Kamaka taditadi is a new marine species of a genus heretofore found in fresh and brackish
waters of Japan, eastern Siberia and Vietnam. Our species was found in almost fully saline
seawater in an embayment near Madang, Papua New Guinea. The new species differs from
the three previously known species in the thick male antenna 2 and the odd eusirid form of
male gnathopod 2; it also is characterized, but not necessarily uniquely, in the short coxae 2-
7, sparsity of spines on uropods 1-2, broad apex of mandibular palp and weak merus of
pereopods 3-4.
Introduction
The discovery of Kamaka taditadi sp. nov.
from marine waters of Papua New Guinea is
remarkable because previous species of the
genus have been found only in fresh to brackish
waters of the Asian mainland from eastern
Siberia through Japan to Vietnam. Kamaka is
known primarily as a stream, river and lake
genus. Our species was collected in almost fully
saline seawaters in an embayment next to the
dock at the Christensen Research Institute in
Madang, Papua New Guinea.
We take the opportunity to modernize the
diagnosis of the genus, provide a new key to the
species and list the species and all of their liter-
ature citations. The distribution of each species
is briefly stated and geographic codes from
Barnard and Barnard (1983) are appended in
brackets.
Corophiidae
Kamaka Derzhavin
Kamaka Derzhavin, 1923: 188 J.L. Barnard, 1973:
19.
Type species. Kamaka kuthae Derzhavin, 1923
(monotypy).
Description. Body subcylindrical, slightly
depressed, smooth, urosomites 1-2 coalesced, 3
free from 2 but coalesced with telson, marked
ventrally by sutures.
Rostrum short, supra-antennal line almost
absent except in defining ocular lobes, ocular
lobes elongate, very produced forward, blunt,
antennal sinus deep. Head longer than
pereonites 1-2 together. Eyes medium, on
apices of stalked ocular lobes.
Antennae of medium length, 1 shorter than 2,
both slender or antenna 2 stout in male in one
species, peduncular article 3 of antenna 1
scarcely to slightly shorter than 1 , cither article 1
or 2 longest, accessory flagellum absent, main
flagellar articles very few. Antenna 2 peduncular
article 3 scarcely elongate, flagellar articles 3-7.
Epistome not produced anteriorly [new obser-
vation]. Labrum subrounded, incised, produced
forward from epistome (lateral view). Mandible
normal, palp strong, very slender, article I
elongate, article 3 rectolinear or weakly clavate,
shorter than 2. Labium with entire outer lobes,
with well developed inner lobes, mandibular
lobes short, pointed. Inner plate of maxilla 1
short, without setae, outer plate with 9-10
spines, palp 2-articulate. Plates of maxilla 2
ordinary, inner plate with only few or no medio-
marginal setae. Inner plate of maxilliped with
distal plumose setae, outer plate very long, with
spines on medial margin, palp with 4 articles,
article 2 long, article 3 unlobed, article 4 short,
stubby, with medium nail and setae.
Coxae quite variable, either relatively long
and lobuliform, or only coxa 1 large and coxae
2-7 short, weakly overlapping, of various sizes
and shapes, progressively elongate from 2 to 4,
coxa 1 dilated, produced forward, coxa 2 shorter
than 1 , coxa 4 longer or shorter than coxa 1 , not
lobed, coxa 5 at least as long as 4, coxa 7 smaller
than anterior coxae.
Gnathopods 1-2 diverse, male gnathopod 2
greatly larger than 1, gnathopod I poorly sub-
chelate, article 5 long, sublinear, unlobed, longer
31
BioStor
