Corresponding author: Won Kim (
Academic editor: I. Wehrtmann
A new species of crinoid-associated shrimp,
Park J-H, De Grave S, Kim W (2019) A new species of the genus
The genus
Fieldwork for this study was carried out and organised in Korea (2012–2018), the Philippines (2014, 2018), and Vietnam (2016–2018) by
Molecular phylogenetic analyses were performed to elucidate the phylogenetic position of the new species within
Specimens used in the phylogenetic analysis, with collection location, GenBank accession numbers (
Taxa | Location | Voucher ID | GenBank accession numbers | Source | |||
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16S |
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Korea |
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Present study | ||
Korea |
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Present study | ||
Korea |
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Present study | ||
Korea |
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Present study | ||
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Philippines | N/A |
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Present study | |
Philippines | N/A |
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Present study | ||
Philippines |
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N/A | N/A | N/A | Present study | ||
Philippines |
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N/A | N/A | N/A | Present study | ||
Philippines |
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Present study | ||
Taiwan | UO Tw12-48B |
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Philippines |
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Present study | |
Vietnam |
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Present study | ||
Vietnam |
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Present study | ||
Vietnam | UO V08-34 |
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Taiwan | UO Tw12-86 |
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Philippines |
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Present study | |
Philippines |
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Present study | ||
Taiwan | UO Tw12-49 |
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Philippines |
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Present study | |
Philippines |
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Present study | ||
Taiwan | NTOU 6687-09 |
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Philippines |
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Present study | |
Philippines |
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Present study |
KOREA – Dadohaesang National Park • 1 ♀ (pocl 2.7 mm); Geomundo Island;
Rostrum well developed, with dorsal and ventral teeth. Carapace smooth, without epigastric tooth; lateral carinae feebly developed; supraorbital tooth reduced, blunt; inferior orbital angle pointed; antennal and hepatic teeth well developed. Fourth thoracic sternite without median process. Abdomen with rounded pleura. Telson with two pairs of small dorsal spiniform setae, and with three pairs of posterior spiniform setae. Eyes with hemispherical cornea. Basal antennular segment with two acute distolateral teeth. Antennal basicerite with sharp distoventral tooth; scaphocerite with large distolateral tooth, not reaching distal end of lamella. Epistome rounded. Mandible without palp; molar process robust; incisor process with four or five terminal teeth. Maxillula with bilobed palp. Maxilla with blunt palp, basal endite well developed, bilobed. First maxilliped with simple palp; basal and coxal endites fused; exopod with developed caridean lobe; epipod bilobed. Second maxilliped with subquadrate epipod, without podobranch. Third maxilliped with slender exopod; arthrobranch rudimentary. First pereiopods slender, fingers subspatulate with entire cutting edges. Second pereiopods equal in shape and subequal in size; palm articulated subproximally; cutting edges of fingers feebly dentate proximally, serrated distally. Dactyli of ambulatory pereiopods biunguiculate; corpus with two or three acute dorsodistal spinules, with acute preterminal accessory tooth. Uropodal exopod with distolateral tooth and movable acute spine.
Rostrum (Figs
Carapace (Figs
Thoracic sternite (Fig.
Abdomen (Fig.
Telson (Fig.
Eye (Figs
Antennule (Fig.
Antenna (Fig.
Mandible (Fig.
Maxillula (Fig.
Maxilla (Fig.
First maxilliped (Fig.
Second maxilliped (Fig.
Third maxilliped (Fig.
First pereiopod (Fig.
Second pereiopods (Figs
Ambulatory pereiopods (Fig.
Fourth pereiopod (Fig.
Fifth pereiopod (Fig.
Pleopods as usual for genus. First pleopod of male (Fig.
Uropod (Fig.
The new species is named in honour of Dr AJ (Sandy) Bruce, in recognition of his considerable contribution to the systematics of
Body colour (Fig.
Colour pattern of three species of
The specimens were collected from the crinoids
Presently only known from the type locality, Jeju Special Self-Governing Province, Korea as well as Hong Kong (
The new species is morphologically very similar to the other crinoid-associated species in the genus,
The crinoid-associated genera
We obtained fragments of 658, 462, 293, and 655 bp for the
Kimura 2-Parameter model distances for
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1. |
0.15 % | ||||
2. |
1.25 % | 13.78 % | |||
3. |
N/A | 15.10 % | 10.95 % | ||
4. |
1.09 % | 18.17 % | 17.25 % | 14.61 % |
Phylogenetic analyses were conducted on 21 specimens of seven species of four genera (Table
Phylogenetic tree of
We thank Dr Nguyen Van Tu (