High cryptic diversity in the kleptoparasitic genus Hyalorisia Dall, 1889 (Littorinimorpha: Capulidae) with the description of nine new species from the Indo-West Pacific
Author
Fassio, Giulia
Author
Russini, Valeria
Author
Buge, Barbara
Author
Schiaparelli, Stefano
Author
Modica, Maria Vittoria
Author
Bouchet, Philippe
Author
Oliverio, Marco
text
Journal of Molluscan Studies
2020
Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen
2020-09-18
86
4
401
421
http://dx.doi.org/10.1093/mollus/eyaa028
journal article
8663
10.1093/mollus/eyaa028
613998a5-1f0e-46b2-9141-a0bce996b557
4464900
6DBF9C90-3CAA-49F3-A9ED-9611D073840F
Hyalorisia profunda
Fassio, Bouchet & Oliverio
new species
MOTU-9 (
Figs 3I
,
6A
)
Type material
:
Holotype
:
South China Sea, ZHONGSHA 2015, Stn CP4137
,
19°53 N
,
114°25 E
,
524–536 m
,
MNHN-IM-2013-59695
.
One
paratype
: same locality as holotype,
MNHN-IM-2013-59696
.
Material examined
:
Type
and other material (MNHN-IM-2007-33806, MNHN-IM-2007-33828 and MNHN-IM-2013-44655).
Etymology
: After the Latin adjective
profundus
,
-a
,
-um
, meaning deep, with reference to the fact that this species occurs at great depths.
ZooBank registration
:
urn:lsid:zoobank.org:act:
668C5D77-6FAB-457D-A7D9-0F142DC12E49
.
COI-based diagnosis
: Three diagnostic (autapomorphic) positions in the alignment: 52(G), 325(T) and 359(C).
Shell (data for
holotype
shown within parentheses)
: Size small to medium for the genus: length 6–9 (7) mm, width 4–6 (5) mm, height 2–3 (2) mm; thin, ellipsoidal to rounded, depressed; white shell surface with smooth yellowish periostracum; anterior margin rounded; protoconch of 1–1.1 (1.1) whorls, diameter of nucleus 0.1–0.21 (0.16) mm; teleoconch smooth except for distinct commarginal growth ridges; apertural margin thin, interior glossy white; lamella narrow, width 0.29–0.69 (0.4) mm.
Soft parts
: Not examined; damaged by tissue clipping.
Host
: Based on the field label, the
holotype
and
paratype
were attached to a
Propeamussium
sp.; at that station, the only propeamussiids collected were
P. jeffreysii
and
P. caducum
. Two specimens (MNHN-IM-2007-33806 and MNHN-IM-2007-33828) were found at the same station; these and specimens of
P. caducum
(MNHN-IM-2007-33805 and MNHN-IM-2007-33827, respectively) have consecutive registration numbers, and MNHN-IM-2007-33827 also has a mark on the shell that corresponds to the contour of the
Hyalorisia
specimen. Another
Hyalorisia
specimen (MNHN-IM-2013-44655) was found at a station where the only propeamussiid collected was
P. caducum
.
Distribution
: So far known only from the South
China
Sea and the
Philippines
, at depths of
536–1,240 m
.
Remarks
:
Hyalorisia profunda
n. sp.
was found syntopically with
H. nanhaiensis
n. sp.
(MOTU-6) on the continental slope of the South
China
Sea (ZHONGSHA 2015: Stn CP4137).