DESCRIPTION OF A NEW SPECIES OF MALAYOPOTAMON BOTT, 1968 (DECAPODA, BRACHYURA, POTAMIDAE) FROM GUNUNG SLAMET, CENTRAL JAVA,

BY

DAISY WOWOR1,3) and SWEE HEE TAN2,4) 1) Division of Zoology, Research Center for Biology, Indonesian Institute of Sciences (LIPI), Jalan Raya Jakarta km 46, Cibinong 16911, Indonesia 2) Raffles Museum of Biodiversity Research (RMBR), National University of Singapore, Department of Biological Sciences, 6 Science Drive 2, #03-01, Singapore 117546, Republic of Singapore

ABSTRACT

A new species of terrestrial potamid crab, Malayopotamon lipkei sp. nov., is described from Gunung Slamet, Central Java, Indonesia. This new species is similar to M. granulatum (De Man, 1892), but can be differentiated by several characters, viz. the carapace with longer anterolateral serrated crest margins, the relatively larger and the denser granules on branchial and gastric regions, more prominent epigastric lobes, males with proportionately broadly abdominal somites III-V, more granulated chelipeds, and distal segment of G1 bent inwards ◦ at about 30 .

RÉSUMÉ

Une nouvelle espèce de crabe terrestre Potamidae, Malayopotamon lipkei sp. nov., est décrite de Gunung Slamet, Java centrale, Indonésie. Cette nouvelle espèce est similaire à M. granulatum (De Man, 1892), mais peut s’en distinguer par plusieurs caractères tels que: la carapace avec des bords en crêtes serrulés plus longues antérieurement, les régions branchiales et gastriques relativement plus grandes et avec une plus forte densité de granules, les lobes épigastriques plus proéminents, chez les mâles les somites abdominales III-V proportionellement élargis, des pinces plus granuleuses et la partie distale du G1courbée vers ◦ l’intérieur d’environ 30 .

3) Corresponding author; e-mail: [email protected] 4) e-mail: [email protected]

© Koninklijke Brill NV, Leiden, 2010 Studies on Malacostraca: 727-734 728 CRM 014 – Fransen et al. (eds.), LIPKE BIJDELEY HOLTHUIS MEMORIAL VOLUME

INTRODUCTION

Of the 10 known species of Malayopotamon Bott, 1968 (Ng et al., 2008), only two have been reported from Java, i.e. M. granulatum (De Man, 1892) and M. javanense (Bott, 1968). Both species are only known from Province thus far (De Man, 1892; Bott, 1968, 1970; Ng & Tan, 1999). They are usually montane or submontane species and are sometimes found together especially in Cibodas , Cianjur Regency at 1400 m asl. The most eastern known distribution for M. granulatum is Kuningan Regency in West Java at the border with Central Java (see material examined). In this paper, a new species of Malayopotamon is described from Central Java Province. The material examined is deposited in Museum Zoologicum Bogoriense (MZB), Research Center for Biology, Indonesian Institute of Sciences, Cibi- nong, Indonesia; and Zoological Reference Collection (ZRC), Raffles Museum of Biodiversity Research, National University of Singapore. The Indonesian terms “Sungai” abbreviated as Sg., refers to river, stream or tributary, “Gu- nung” is abbreviated as Gn. referring to mountain, “Kampung” is abbreviated as Kp. referring to village. The terminology used here follows Ng (1988) and Ng et al. (2008). The abbreviations G1 and G2 refer to the first and second male gonopods, respectively.

TAXONOMIC ACCOUNT

Family POTAMIDAE Ortmann, 1896 Genus Malayopotamon Bott, 1968 Malayopotamon lipkei sp. nov. (figs. 1A-C, 2A, 3A) Material examined. — Holotype: male (43.6 × 37.7 mm) (MZB Cru 2902), Banyumas ◦  Regency, Batur Raden District, Gn. Slamet, Sg. Kracakan, Kp. Ketengger, 07 18.837 S ◦  109 12.313 E, coll. Heryanto & U. Nurhaman, 20 May 2009. Paratypes: 1 male (27.2 × 23.5 mm) (ZRC), Banyumas Regency, Batur Raden District, Gn. Slamet, Sg. Serengseng, Kp. Ketengger, coll. Heryanto & U. Nurhaman, 24 May 2009; 1 female (29.6 × 26.0 mm) (MZB Cru 2903), Banyumas Regency, Batur Raden District, Gn. Slamet, Sg. Kalipagu, Kp. Ketengger, coll. Heryanto & U. Nurhaman, 19 May 2009; 2 females (33.2 × 28.9-23.1 × 20.4 mm), 1 juvenile (16.8 × 14.4 mm) (MZB Cru 2904), Banyumas Regency, Batur Raden District, ◦  ◦  Gn. Slamet, Sg. Akar, around pine forest, Kp. Ketengger, 07 18.682 S 109 12.880 E, coll. Heryanto & U. Nurhaman, 22 May 2009. Others: 7 females (60.9 × 50.6-50.3 × 42.9 mm) (ZRC), from aquarium trade in Singapore, supposedly collected from Cilacap, 5 May 2009. All localities in Central Java Province, Indonesia.