A New Species Of Chaerilus Simon, 1877 (Scorpiones, Chaerilidae) From Thailand Author Lourenço, Wilson R. Author Sun, Dong Author Zhu, Mingsheng text Raffles Bulletin of Zoology 2010 2010-02-28 58 1 79 85 journal article 10.5281/zenodo.4508329 2345-7600 4508329 Chaerilus thai , new species ( Figs. 3 , 4 , 5A, C, E ; Table 1) Material examined. – Holotype : female ( MHBU ), Thailand , Narathiwat Province , Waeng District , Bala-Hala Wildlife Sanctuary ( 250 m alt., evergreen rain forest), coll. D. Huber , 8 Jun.1998 . Paratypes . – No paratypes . Diagnosis. – New species of small size compared to the other species of the genus, with a total length of 15.8 mm. Carapace with the anterior margin straight, almost acarinate and weakly granulated to smooth; furrows shallow. Metasomal carinae moderately marked; ventral carinae vestigial on segments I and II, weakly marked on segment III. Dentate margins of fixed and movable fingers of pedipalp chela with 6 rows of granules, not well delimited. Pectinal tooth count 4- 4 in female. Genital operculum plates have a sub-oval shape. Trichobothriotaxy of Type B, orthobothriotaxic. Relationships. – By its general morphology and the pattern of pigmentation, Chaerilus thai , new species , can be associated with Chaerilus celebensis Pocock. The new species can, however, be distinguished by the following features: (i) a smaller total size and distinct morphometric values (see Table 1), (ii) a carapace very weakly granulated to smooth, (iii) an overall darker pigmentation than that of C. celebensis ; are particularly marked the dorsal surface of metasomal segments I to IV, pedipalps, chelicerae and ventral aspect, including pectines.