The taxonomy of the semiterrestrial gecarcinucid crab Lepidothelphusa cognettii (Nobili, 1903) from

Borneo is revised. The identity of L. cognettii s. str. is clarified and five new species: L. flavochela, L. limau, L. loi, L. padawan and L. sangon, are described from southwestern Sarawak, Malaysia. The species are characterised by their diagnostic live colours, structures of their carapaces, chelae, male abdomens and male first gonopods. They also occupy geographically discrete ranges, sometimes with different habitats

Jongkar, Grinang

K. L. Ng, Peter

Fig. 14. Live colours of three Lepidothelphusa species from Kuching Division, southwestern Sarawak. A, B, Lepidothelphusa loi, holotype male (10.3 × 9.6 mm) (ZRC 2015.0607), Gunung Ampungan, Sadong River Basin, Serian, Sarawak; C, D, Lepidothelphusa padawan, new species, paratype male (15.8 × 13.2 mm) (SBC.C.00440–4), Bung Brungu, Padawan, Sarawak; E, F, Lepidothelphusa sangon, new species, paratype male (8.0 × 7.0 mm) (SBC.C.00476), Nawang Waterfall, Bung Bratak, Bau, Sarawak.Published as part of Grinang, Jongkar & Ng, Peter K. L., 2015, Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo, pp. 564-582 in Raffles Bulletin of Zoology 63 on page 580, DOI: 10.5281/zenodo.538671

Grinang, Jongkar

Ng, Peter K. L.

NEUROSURGERY ENTHUSIASTIC WOMEN SOCIETY

Fig. 14 in Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo

Fig. 1. Lepidothelphusa cognettii (Nobili, 1903), male (12.2 × 10.2 mm) (ZRC 2015.0601), Batu Panggah Trail, Gunung Penrissen, Kuching, Sarawak. A, overall dorsal view of habitus; B, dorsal view of carapace; C, ventral view showing anterior thoracic sternum and male abdomen; D, frontal view of carapace; E, outer view of right fourth ambulatory leg; F, left third maxilliped showing exopod; G, left cheliped showing serrated inner margin of merus; H, outer view of left chela; I, outer view of right chela.Published as part of Grinang, Jongkar & Ng, Peter K. L., 2015, Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo, pp. 564-582 in Raffles Bulletin of Zoology 63 on page 566, DOI: 10.5281/zenodo.538671

Fig. 1 in Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo

Grinang, Jongkar, Ng, Peter K. L. (2015): Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo. Raffles Bulletin of Zoology 63: 564-582, DOI: http://doi.org/10.5281/zenodo.538671

Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo

Fig. 5. Lepidothelphusa limau, new species, holotype male (12.1 × 10.8 mm) (ZRC 2015.0605), Kampung Peros, Krokong, Bau, Sarawak. A, overall dorsal view of habitus; B, dorsal view of carapace; C, ventral view showing anterior thoracic sternum and male abdomen; D, frontal view of carapace; E, outer view of right fourth ambulatory leg; F, left third maxilliped showing exopod; G, left cheliped showing serrated inner margin of merus; H, outer view of left chela; I, outer view of right chela.Published as part of Grinang, Jongkar & Ng, Peter K. L., 2015, Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo, pp. 564-582 in Raffles Bulletin of Zoology 63 on page 571, DOI: 10.5281/zenodo.538671

Fig. 5 in Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo

Fig. 2. Lepidothelphusa cognettii (Nobili, 1903), male (12.2 × 10.2 mm) (ZRC 2015.0601), Batu Panggah Trail, Gunung Penrissen, Kuching, Sarawak. A, dorsal view of left G1; B, dorsal view of distal part of left G1; C, dorsal view of left G2 (distal segment damaged at proximal half); D, ventral view of left G1; E, ventral view of distal part of left G1. Scale bars = 0.5 mm.Published as part of Grinang, Jongkar & Ng, Peter K. L., 2015, Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo, pp. 564-582 in Raffles Bulletin of Zoology 63 on page 567, DOI: 10.5281/zenodo.538671

Fig. 2 in Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo

Fig. 11. Lepidothelphusa sangon, new species, holotype male (8.4 × 7.6 mm) (ZRC 2015.0611), Nawang Waterfall, Bung Bratak, Bau, Sarawak. A, overall dorsal view of habitus; B, dorsal view of carapace; C, ventral view showing anterior thoracic sternum and male abdomen; D, frontal view of carapace; E, outer view of right fourth ambulatory leg; F, left third maxilliped showing exopod; G, left cheliped showing serrated inner margin of merus; H, outer view of left chela; I, outer view of right chela.Published as part of Grinang, Jongkar & Ng, Peter K. L., 2015, Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo, pp. 564-582 in Raffles Bulletin of Zoology 63 on page 577, DOI: 10.5281/zenodo.538671

Fig. 11 in Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo

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564Grinang & Ng: Revision of genus Lepidothelphusa from SarawakTaxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, BorneoJongkar Grinang1* & Peter K. L. Ng2Abstract. The taxonomy of the semiterrestrial gecarcinucid crab Lepidothelphusa cognettii (Nobili, 1903) from Borneo is revised. The identity of L. cognettii s. str. is clarified and five new species: L. flavochela, L. limau, L. loi, L. padawan and L. sangon, are described from southwestern Sarawak, Malaysia. The species are characterised by their diagnostic live colours, structures of their carapaces, chelae, male abdomens and male first gonopods. They also occupy geographically discrete ranges, sometimes with different habitats.Key words. Decapoda, Gecarcinucidae, Lepidothelphusa, taxonomy, revision, mudstone, sandstone, SarawakRAFFLES BULLETIN OF ZOOLOGY 63: 564–582Date of publication: 18 December 2015http://zoobank.org/urn:lsid:zoobank.org:pub:BAA493D3-8195-417B-ABD8-A36D3FD90533© National University of SingaporeISSN 2345-7600 (electronic) | ISSN 0217-2445 (print)1Institute of Biodiversity and Environmental Conservation, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia; Email: gjongkar@unimas.my (*corresponding author)2Lee Kong Chian Natural History, Faculty of Science, National University of Singapore, 2 Conservatory Drive, 117377 Singapore; Email: peterng@nus.edu.sgINTRODUCTIONIn studying the crustacean specimens of Borneo sent to him by Robert Shelford, curator of the Sarawak Museum from 1897 to 1904, Nobili (1903) recognised an unusual freshwater crab collected from 3000 feet high in Mount Penrissen which he identified as a new species, Potamon (Geotelphusa) cognettii. He remarked that the species can be distinguished from known Bornean freshwater crabs by its square carapace, the presence of a toothed projection on the chelipeds, and the disproportionately large adult male cheliped (Nobili, 1903: 18). Colosi (1920) later established a new genus, Lepidothelphusa, for the species. Bott (1970) highlighted the unusual-scissor blade like fingers of the chelipeds, and commented the species has relationships with the gecarcinucid genus Phricotelphusa Alcock, 1909, from Myanmar, Thailand and northern Peninsular Malaysia. He also added Bidi in Sarawak to the list of localities for the species. In discussing Lepidothelphusa cognettii (Nobili, 1903), Ng & Grinang (2004) noted that current records may involve more than two species, but they did not elaborate. Ng et al. (2008: 68) commented that the specimens from Bau (includes Bidi) was an undescribed species differing from the type species by the colour in life and form of the third maxillipeds and G1s. They also provided a photograph of a specimen from there.Extensive collections in recent years from Kuching Division, Sarawak, have resolved the taxonomy of the species. Detailed descriptions and figures of L. cognettii s. str. and the five new species are provided. The habitat preferences and distributions of the species are also documented.MATERIAL AND METHODSThe terminology essentially follows Ng (1988), with the abbreviations G1 and G2 used for the male first and second gonopods, respectively. Measurements provided (in millimetres) are of the carapace width and length, respectively. The Malay words “Kampung” and “Gunung” are used for village and mountain, respectively. Specimens examined are deposited in the Sarawak Museum (SM), Kuching, Sarawak; Sarawak Biodiversity Centre (SBC), Kuching, Sarawak; and the Zoological Reference Collection (ZRC) of the Lee Kong Chian Natural History Museum (ex Raffles Museum of Biodiversity Research), National University of Singapore.The G1 is a valuable character in separating the various species but has to be compared at the same orientation to make comparisons useful. In this paper, the G1s and G2s have been drawn from a standardised plane to ensure comparisons are accurate. The G1s of all Leipidothelphusa species are gently twisted so how they appear from dorsal and ventral views can be quite different in appearance. For example in L. flavochela, new species, the G1 appears almost straight from the dorsal view (Fig. 4A) but is gently curved from the ventral view (Fig. 4D).Taxonomy & Systematics

Fig. 3. Lepidothelphusa flavochela, new species, holotype male (8.1 × 7.2 mm) (ZRC 2015.0604), Pagar Besi, Kampung Gumbang, Bau, Sarawak. A, overall dorsal view of habitus; B, dorsal view of carapace; C, ventral view showing anterior thoracic sternum and male abdomen; D, frontal view of carapace; E, outer view of right fourth ambulatory leg; F, left third maxilliped showing exopod; G, outer view of right chela; H, outer view of left chela; I, left cheliped showing serrated inner margin of merus.Published as part of Grinang, Jongkar & Ng, Peter K. L., 2015, Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo, pp. 564-582 in Raffles Bulletin of Zoology 63 on page 569, DOI: 10.5281/zenodo.538671

Fig. 3 in Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo

Fig. 10. Lepidothelphusa padawan, new species, holotype male (13.6 × 12.5 mm) (ZRC 2015.0608), Kampung Sentah, Padawan, Sarawak. A, dorsal view of left G1; B, dorsal view of distal part of left G1; C, dorsal view of left G2; D, ventral view of left G1; E, ventral view of distal part of left G1. Scale bars = 0.5 mm.Published as part of Grinang, Jongkar & Ng, Peter K. L., 2015, Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo, pp. 564-582 in Raffles Bulletin of Zoology 63 on page 576, DOI: 10.5281/zenodo.538671

Fig. 10 in Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo

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Taxonomy of the semiterrestrial crab Lepidothelphusa cognettii (Nobili, 1903) (Crustacea: Decapoda: Brachyura: Gecarcinucidae), with descriptions of five new species from Sarawak, Malaysia, Borneo

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