A new genus and species of Aoridae (Amphipoda, Senticaudata), Propejanice lagamarensis gen. nov. sp. nov. from Brazil
Author
Myers, Alan A.
Author
Desiderato, Andrea
text
Zootaxa
2019
2019-07-05
4629
2
287
293
journal article
26294
10.11646/zootaxa.4629.2.11
86a7188c-a474-4fc5-a8e5-b9384c223736
1175-5326
3269051
6CC13FC6-7458-46F6-BB52-992528F7B449
Propejanice
gen. nov.
Diagnosis.
Head
anteroventral margin moderately excavate; ocular lobes obtuse, only moderately produced.
Antenna 1
peduncular article 3 much shorter than peducular article 2.
Antenna 2
subpediform.
Mandible
palp article 3 not expanded distally.
Gnathopod 1
enlarged in male, larger than gnathopod 2, carpochelate.
Gnathopod
2
in male slender, setose, merus elongate, subquadrate, divergent.
Pereopod 7
longer than pereopod 6,
Uropod 3
uniramous.
Type
species.
Propejanice lagamarensis
sp. nov.
by monotypy.
Etymology.
From the name of its closest relative
Janice
(a name derived from the Hebrew Yochanan), with the Latin prefix ‘prope’ meaning close to.
Remarks.
Propejanice
gen. nov.
closely resembles
Janice
Griffiths, 1973
.The two genera share the long divergent merus on gnathopod 2, but
Propejanice
gen. nov.
differs in the carpochelate male gnathopod 1 (subchelate in
Janice
) in which the posterodistal margin of the carpus is drawn out into a long acute spine.
Janice spinidactyla
Griffiths
is known from a single male specimen. It closely resembles the female of
Propejanice lagamarensis
sp. nov
.
described here. If further material of
Janice spinidactylus
Griffiths
is available and it is shown that Griffith’s specimen is in fact a female and furthermore that males of the species have a carpochelate gnathopod 1, then
Propejanice
may have to be synonymised with
Janice
. For the moment we accept that the unique specimen of
Janice spinidactyla
is, as indicated by
Griffiths (1973)
a male and accordingly we erect the genus
Propejanice
nov. gen.
for
P. lagamarensis
sp. nov.
Myers & Lowry (2003)
, placed the little known genus
Janice
in the
Unciolidae
because of the close resemblance of the gnathopod 2 to that of the unciolid
Paracorophium
Stebbing, 1899
. It is clear now after study of material of the new genus, that
Janice
Griffths
and
Propejanice
gen. nov
.
should both be correctly placed in the
Aoridae
and that the peculiar gnathopod 2 is a homoplasy.