Decapod Crustacea collected by the NORFANZ Expedition: Galatheidae and Polychelidae
Author
Ahyong, Shane T.
text
Zootaxa
2007
1593
1
54
journal article
10.5281/zenodo.178624
7466bbb6-f889-4e40-b22d-e3aee96f9acb
1175-5326
178624
Phylladiorhynchus
cf.
pusillus
(
Henderson, 1885
)
(
Fig. 20
B, 22)
Galathea pusilla
Henderson, 1885
: 407
[
type
locality: off New South
Wales
,
Australia
]; 1888: 121, pl. 12: figs. 1, 1a, b.
Galathea integra
Benedict, 1902
: 248
[
type
locality: off Honshu,
Japan
].
Galathea lenzi
Rathbun, 1907
: 49
, pl. 3: fig 1 [
type
locality: Corral,
Chile
].
Phylladiorhynchus pusillus
.—
Haig, 1973
: 282
.—
Baba 1974
: 381
; 1991: 486–487, fig. 4e, f; 2005: 305 [synonymy].
Material examined.
Norfolk
Ridge:
NIWA
28065,
1 female
(
8.7 mm
), southern
Norfolk
Ridge,
33°23.41’S
,
170°11.58’E
,
469–526 m
, TAN0308/126 #87,
31 May 2003
.
Southeastern
Australia
:
AM P17563,
2 males
(
4.9–5.5 mm
),
1 female
(
4.7 mm
), S and SW of Mount Cann, Gippsland, Victoria,
Australia
,
120–183 m
; AM E6158,
1 male
(
6.9 mm
), S of Cape Everard, Victoria,
Australia
, with rhizocephalan.
Colour in life.
Carapace and abdomen transparent, pale yellow-orange; with orange-red marginal spines and rostrum. Chelipeds clear, diffuse pink-red; spines orange-red. Fingers crossed by white band. Walking legs with diffuse, clear orange-red banding.
Remarks.
The single
NORFANZ
specimen agrees with several ‘large’ Australian and
New Zealand
specimens reported as
P. pusillus
by
Haig (1973)
and
Baba (1991)
, respectively, in their straight or almost straight rather than distinctly convex rostral margins.
Phylladiorhynchus pusillus
sensu stricto
bears convex rostral margins (
Baba 1991
) and generally does not exceed about
5 mm
carapace length. The rostral condition of these ‘aberrant’ specimens appears not to be an allometric artefact, being stable across a wide size range (
Fig. 22
).
As
presently understood,
P. p u s i l l u s
could be a composite taxon, so present specimens are only tentatively identified pending a review of
Phylladiorhynchus
by K. Schnabel (NIWA).
Distribution.
Western Indian Ocean to eastern
Australia
,
New Zealand
, the Chesterfield Islands, to
Japan
, San Félix, and the Juan Fernández Islands; intertidal to
580 m
(
Baba 2005
).