New records of sipunculan worms from Taiwan
Author
Hsueh, Pan-Wen
Author
Kuo, Chia-Ming
text
Zootaxa
2009
2067
51
61
journal article
41153
10.5281/zenodo.187023
f47f2de5-ebee-4164-92d8-e3542a1cd334
1175-5326
187023
Themiste (Lagenopsis) minor minor
(Ikeda)
Figs. 2
G, 3B
Dendrostoma minor
Ikeda, 1904
: 154
.
Themiste minor minor
Cutler, 1994
: 154
(for complete synonymy).
Material examined.
One specimen (NMNS-5928-009), Shihmen (
25°17.84' N
,
121°34.23' E
), Taipei County, northwestern
Taiwan
, lower intertidal sediment rocks, coll. P.-W. Hsueh,
4 November 2007
;
11 specimens
(NMNS-5928-010), Shihmen (
25°17.84' N
,
121°34.23' E
), Taipei County, northwestern
Taiwan
, lower intertidal sediment rocks, coll. P.-W. Hsueh,
9 May 2008
;
45 specimens
(NMNS-5928-011), Shihmen (
25°17.84' N
,
121°34.23' E
), Taipei County, northwestern
Taiwan
, lower intertidal sediment rocks, coll. P.-W. Hsueh,
10 May 2008
.
Remarks.
Themiste minor
Ikeda
and
T
.
variospinosa
Edmonds
are the only two species in the subgenus
Themiste
(
Lagenopsis
)
that have introvert hooks. The former species differs from the latter by the presence of posteriorly oriented hooks, and introvert hooks of the other species are orientated in all directions (
Cutler & Cutler 1988: 746, fig. 3A, C; present study,
Fig. 3
B
).
Cutler and Cutler (1988)
divided
T
.
minor
into two subspecies
T
.
minor minor
and
T
.
minor huttonii
(Benham)
, with the latter having a relatively longer body length (trunk length reaching
55 mm
vs. <
20 mm
), as well as more hooks and a longer hook-bearing region on the introvert (55–75 % vs. 25–35 %).
Themiste minor huttonii
is known only from
Australia
,
New Zealand
and the Chatham Islands in South Pacific Ocean, whereas
T
.
minor minor
ranges from across
Japan
,
China
, South
Australia
and southern Africa.
Cutler and Cutler (1988)
suggested that
T
.
minor minor
is a cooltemperate, intertidal and shallow subtidal form but our records show that it also occurs in subtropical waters.