A synopsis of the Tanaidacea (Crustacea: Peracarida) of Singapore, with a review of tanaidacean diversity in Southeast Asia and the South China Sea
Author
Kong, Chim Chee
0000-0001-6378-9561
Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Singapore 117558. & Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Singapore 117558. & St. John’s Island National Marine Laboratory, Tropical Marine Science Institute, National University of Singapore, 18 Kent Ridge Road, Singapore 119227. tmscck @ nus. edu. sg; https: // orcid. org / 0000 - 0001 - 6378 - 9561
tmscck@nus.edu.sg
text
Zootaxa
2024
2024-05-16
5451
1
1
75
http://dx.doi.org/10.11646/zootaxa.5451.1.1
journal article
10.11646/zootaxa.5451.1.1
1175-5334
11232365
911E1D07-22B1-479E-8720-25DBD50D0D56
Konarus crassicornis
(
Stebbing, 1905
)
(
Figs. 17A–D
)
Heterotanais crassicornis
Stebbing, 1905: 4–5
, pl. IA.
Pseudoleptochelia crassicornis
Sieg, 1983: 488–489
.
Konarus crassicornis
Bamber, 2008c: 184
.
Bamber & Chatterjee, 2010: 18–22
, figs. 1–2.
Material examined.
Station
SG86
:
38 specimens
, including 9 that are incomplete (HAN-EXP-00.0-TAN03, HAN-EXP-00.0-TAN04, HAN-EXP-00.0-TAN06);
1 male
,
23 adults
, 9 mancae (HAN-EXP-02.5-TAN04, HAN- EXP-02.5-TAN05, HAN-EXP-02.5-TAN07);
1 male
,
22 adults
, 1 manca (HAN-EXP-05.0-TAN02, HAN-EXP-05.0-TAN03, HAN-EXP-05.0-TAN06);
36 specimens
, including
10 adults
and 1 manca (HAN-EXP-07.5-TAN01, HAN-EXP-07.5-TAN02, HAN-EXP-07.5-TAN04, HAN-EXP-07.5-TAN05, HAN-EXP-07.5-TAN06);
1 male
,
4 adults
, 2 mancae (HAN-EXP-10.0-TAN02, HAN-EXP-10.0-TAN04, HAN-EXP-10.0-TAN05, HAN-EXP-10.0- TAN06). Station
SG91
:
3 adults
(SEN-PRO-00.0-TAN07);
11 adults
, 2 mancae (SEN-PRO-02.5-TAN05, SEN- PRO-02.5-TAN09);
1 adult
(SEN-PRO-05.0-TAN09);
2 adults
(SEN-PRO-07.5-TAN08).
FIGURE 17.
Konarus crassicornis
(
Stebbing, 1905
)
, Singapore: (A) non-ovigerous female, SEN-PRO-00.0-TAN07, dorsal habitus, with inset showing 'fat' peduncle antennule article-1 (arrow); (B) non-ovigerous female, SEN-PRO-02.5-TAN05, lateral habitus; (C) adult male, SEN-PRO-07.5-TAN08, dorsal habitus; (D) adult male, SEN-PRO-05.0- TAN09, lateral habitus, with inset showing the reduced chela fixed finger (arrow). Scale bar = 1 mm.
Remarks.
Bamber (2006)
erected the genus
Konarus
and designated
K. cheiris
Bamber, 2006
as its
type
species. The distinctive feature of this genus is the fat antennule peduncle (
Bamber 2006
).
Konarus
is currently represented by three species (
Anderson 2023
), namely
K. crassicornis
(
Stebbing, 1905
)
,
K. cheiris
and
K. straddi
(
Bamber, 2008c
)
, which were recorded from intertidal and shallow subtidal (
10–40 m
) habitats in the Indo-West Pacific including
India
,
Australia
(
Queensland
) and
New Caledonia
(
Stebbing 1905
;
Bamber 2006
,
2008c
;
Bamber & Chatterjee 2010
). All three species are very similar in general morphology (
Bamber & Chatterjee 2010
;
Bamber 2013a
). The present material from
Singapore
is most similar to
K. crassicornis
. Even though males of
K. crassicornis
from the
type
locality remain unknown, the male specimens of
K. crassicornis
in this study can be easily distinguished from the males of
K. cheiris
and
K. straddi
based on their chelipeds: (1) propodus ovoid, with mid-ventral triangular apophysis and with adjacent row of one long seta and numerous short setae; (2) fixed finger absent (
Fig. 17D
); and (3) movable finger shorter than propodus. Previous records of
K. crassicornis
occurred in the intertidal shores of
India
at Gulf of Mannar,
Laccadive
Sea (
Stebbing 1905
) and the Andaman Islands, Andaman Sea (
Bamber & Chatterjee 2010
). In Singaporean waters, this species was found only from intertidal macroalgal turfs in the
Singapore
Strait, on an exposed seawall at Pulau Hantu and on a sheltered seawall at Sentosa (Pulau Blakang Mati).