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Peter K. L. Ng

The identity of the homolid Moloha alcocki faughni (Serène & Lohavanijaya, 1973), from the South China Sea, is clarified, and is here regarded as a junior subjective synonym of Paromola macrochira Sakai, 1916. The taxonomy and reliability of various generic and specific characters of P. macrochira are also discussed.

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Peter K. L. Ng

Two new species of brachyuran crabs are represented in a recent collection from caves in southern Myanmar [= Burma]. Demanietta burmanica sp. nov. (Potamidae) is the third species of Demanietta Bott, 1966, recorded from the country, and is closest to D. renongensis (Rathbun, 1904) from Thailand, but differs in the form of the carapace and details of the male first gonopod structure. Pseudosesarma brehieri sp. nov. (Sesarmidae) is allied to P. edwardsii (De Man, 1887) and P. crassimanum (De Man, 1887), both from the Mergui Archipelago, but can be easily distinguished by the distinctive form of its male first gonopod.

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Peter K. L. Ng

Abstract

Doflein (1904) accidentally transposed the figures for the third maxillipeds of two species of pinnotherid crabs he described, a mistake which has taxonomic consequences. The species he described, Pinnotheres villosissimus Doflein, 1904, from Sumatra, is here referred to its own genus, Trichobezoares n. gen. The specimen Doflein identified as “Pinnotheres sp.” from South Africa was referred to a new species, Pinnotheres dofleini by Lenz (in Lenz & Strunck, 1914) partly based on Doflein’s (1904) incorrect figure of the third maxilliped. To stabilize the taxonomy of this species, Doflein’s specimen is selected as the lectotype; fixing the species as a member of Afropinnotheres Manning, 1993. Pinnotheres pilumnoides Nobili, 1906 (Djibouti) was differentiated from the taxon T. villosissimus partially on differences in the third maxilliped. It is redescribed, figured and shown to be a second species of Trichobezoares. The correct authorship for the species established in Lenz & Strunck (1914) is also discussed.

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Peter K.L. Ng

Abstract

Two new species of freshwater crabs of the family Parathelphusidae are described from southern Thailand. Sayamia melanodactylus sp. nov. is one of the smallest members of the genus known, and seems to be most closely related to S. sexpunctata, but differing in carapace and male gonopod characters as well as in the colour of the fingers of its minor chelae (black against brown). Heterothelphusa fatum sp. nov. is related to H. insolita from nearby northeastern Peninsular Malaysia, but has a distinctly more swollen carapace, proportionately more slender ambulatory legs and a very differently structured major male chela.

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Peter K.L. Ng

Abstract

The identity of Cancer armadillus Herbst, 1790, a name not used since it was first established, is clarified. It is shown to be a species of Demania Laurie, 1906 (Brachyura, Xanthidae), a genus of poisonous Indo-West Pacific crabs. Herbst's species is regarded as conspecific with Demania bangladeshensis Ng, Huda & Banu, 1987, and the holotype of D. bangladeshensis is here designated as the neotype of Cancer armadillus. Demania indiana Deb, 1987, is also here regarded as a junior synonym of Demania armadillus.