NEWRECORDSOF DROMIIDAE,, AND FROMT AIWAN(,BRACHYURA)

BY

COLIN L.MCLAY 1,2/, M.-S. JENG3,4/ andTIN-Y AMCHAN 5,6/ 1/ ZoologyDepartment, Canterbury University, Christchurch, P .B.4800, New Zealand 3/ Instituteof Zoology,Academica Sinica, Nankang, T aipei11529, T aiwan,R.O.C. 5/ Instituteof Marine Biology, National T aiwanOcean University, Keelung, T aiwan202, R.O.C.

ABSTRACT

Thefollowing new brachyuran records are reported from T aiwan: Sphaerodromiaducoussoi , Cryptodromiatumida (Dromiidae), Lambrachaeusramifer (Parthenopidae),and Sakailajaponica (Aethridae).Additional records of some uncommon species from T aiwan,namely Metadynomene tanensis (Dynomenidae), Petalomeragranulata (Dromiidae), DaldorŽa horrida (Parthenopidae), and Aethrascruposa (Aethridae)are also reported. These bring the number of species known from Taiwanto: Dromiidae (11), Dynomenidae (1), Parthenopidae (12), and Aethridae (2).

RÉSUMÉ

Lesmentions nouvelles concernant les Brachyoures de T aiwansont donné es pour les espè ces suivantes: Sphaerodromiaducoussoi , Cryptodromiatumida (Dromiidae), Lambrachaeusramifer (Parthenopidae)et Sakailajaponica (Aethridae).Des citations supplé mentaires de Metadynomene tanensis (Dynomenidae), Petalomeragranulata (Dromiidae), DaldorŽa horrida (Parthenopidae)et Aethrascruposa (Aethridae)sont é galementfournies. Ceci porte le nombre d’ espè ces connues de Taiwanà :Dromiidae(11), Dynomenidae (1), Parthenopidae (12) et Aethridae (2).

INTRODUCTION

Renewedinterest in the brachyuranfauna of Taiwanhas resulted in several, im- portant,recent papers.Tan et al. (1999)published a list ofspecies ofParthenopidae knownfrom Taiwan. At the recent International Symposiumon Marine Biologyin Taiwan,May 1998, many new brachyuran records from T aiwanwere reported for

2/ Correspondingauthor; e-mail: [email protected]. ac.nz 4/ e-mail:[email protected]. tw 6/ e-mail:[email protected]

c KoninklijkeBrill NV ,Leiden,2001 Crustaceana 74(9):963-976 ° 964 C.L.MCLAY,M.-S.JENG &T.-Y.CHAN the Dromiidae,, and Palicidae (cf.Ng et al., 2000);Homolidae and La- treilliidae (cf.T anet al., 2000a);Cyclodorippidae (cf. Tan & Huang,2000); Calap- pidae,, and Cancridae (cf. Tan et al., 2000b);Goneplacidae (cf. Ng & Chan,2000); and Grapsidae (cf. Ng et al., 2000).Also Hoet al. (2000)added many species ofEriphiidae, Pilumnidae, and Xanthidae to the island’s knownfauna. Since the symposium,new material ofseveral species, notpreviously known from Taiwan,has beendiscovered. This material is the subject ofthe present paper. Restricted synonymiesare givenfor each species, focusingon records in the vicinity ofTaiwan.The following collection abbreviationsare used: TaiwanMu- seum,Taipei (TMCD),National TaiwanOcean University ,Keelung(NTOU), AcademicaSinica, Taipei (ASIZ),Zoological Reference Collection, Rafes Mu- seum,National University ofSingapore, Singapore (ZRC), and Museum national d’Histoire naturelle, Paris (MNHN).The Ž rst male gonopodis referredto as G1 andthe secondas G2.

SYSTEMATICPART

DYNOMENIDAE Ortmann,1892 Metadynomenetanensis (Yokoya,1933) Dynomenetanensis Yokoya,1933: 96, text-Ž g. 38; Ikeda, 1998: 21, pl. 4 Žgs.1-3; McLay, 1999: 521,Ž gs.4d, 6c, 7f, 9d-e, 11, 13c, e-f, 14e, 25b, 27, 28.

Materialexamined. — Taiwan,T ashiFish Port, Ilan County, commercial trawler, 23.iii.1999: 1 18:1 16:4mm (coll.T .-Y.Chan)(NTOU). —“TAIWAN2000”, R.V.“FisheriesResearch 1” , stn £ DW5, 22 40:5 N 119 56:5 E,27.vii.2000:1 22:6 20:5mm (coll.T .-Y.Chan)(MNHN). ± 0 ± 0 £ Distribution. —Thetype locality of M. tanensis is east ofTanegasima Island, offKyushu, southern Japan, where it was collected from219 m. This species is also knownfrom Japan, Indonesia, New Caledonia, and the TuamotuIslands, French Polynesia (McLay,1999).These are the secondand third recordsof M. tanensis fromT aiwan.McLay (1999) reported a small male specimen (9 :0 8:0 mm) from £ north-easternTaiwan. The depth of the specimen collected duringthe “TAIWAN 2000”cruise was 213m, whichlies within the depthrange for M. tanensis namely, 205-520m. This species is oneof the deeper-waterdynomenids. Discussion. —InJapan, M. tanensis has beenconfused with Dynomene praedator A.Milne-Edwards,1879. Sakai (1976)listed M. tanensis as a synonym of D.praedator ,andused a photoof M. tanensis to represent D.praedator . But these twospecies are verydistinct andhave different habitats: D.praedator is a shallow water species, oftenfound among coral, while M. tanensis is adeepwater species rangingfrom 205 to 520 m. M. tanensis is coveredby ashort soft tomentum