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... Eight species have been recorded in China (Lewis 2003;Song et al. 2005;Niu et al. 2021), all assigned to the subgenus Otostigmus. These species belong to four of the nine groups mentioned by Lewis (2010): ...
... aculeatus Haase, 1881: antennae with 17 articles, 3 antennal articles glabrous dorsally, the ultimate prefemur with two rows of ventrolateral spines, the coxopleural process of leg-bearing segment 21 without a dorsal spine); iii) the rugulosus group (O. astenus Kohlrausch, 1881; O. martensi Lewis, 1992; O. beroni Lewis, 2001; O. lewisi Song et al., 2005; O. xizangensis (Niu et al. 2021): antennae with 18 articles, 2-2.75 antennal articles glabrous dorsally, coxopleural process of leg-bearing segment 21 with a dorsal spine); iv) the scaber group (O. scaber Porat, 1876: antennae with 21 articles, 2-2.5 antennal articles glabrous dorsally, the ultimate prefemur with one rows of ventrolateral spines, coxopleural process of leg-bearing segment 21 with a dorsal spine). ...
... Our results moderately supported the politus group, aculeatus group, and species of the rugulosus group, from both ML and BI analyses (BS > 70% and PP > 0.9) (Fig. 5). The reciprocally monophyletic (Schileyko 1995;Lewis 2002Lewis , 2010Song et al. 2005 Tergite paramedian sutures from 5(6)-20 without 4(5) Complete from tergite 3 ...
Through a combination of morphological and DNA data, a new scolopendrid centipede from southern and southwestern China was revealed: O. tricarinatus sp. nov. The species belong to the politus group but has three sharp tergal keels. Validation of phylogenetic status was performed through molecular analysis of the cytochrome c oxidase subunit I (COI), 16S rRNA, and 28S rRNA sequences from 16 Otostigmus species. Otostigmus tricarinatus sp. nov. was found to be two populations and varied in the number of spines on the ultimate prefemur, the sutures on a sternite, and a pore-free median longitudinal strip in the pore field. The Yunnan-Guizhou plateau population of O. tricarinatus sp. nov. was sister to the clade O. politus politus + O. politus yunnanensis + Guangxi population of O. tricarinatus sp. nov. with strong support from both BI (bayesian inference) and ML (maximum likelihood) analyses (PP = 1, BS = 97%).
... The subgenus Otostigmus Porat, 1876 currently comprises about 56 species (Bonato et al. 2016;Niu et al. 2021). Among them, eight have been recorded in China (Song et al. 2005;Bonato et al. 2016;Niu et al. 2021): O. (O.) aculeatus Hasse, 1887, the median 3 (or 4) ones more or less fused (Fig. 1D, E). Sternites with incomplete paramedian sutures occupying at least anterior 66 to 100% in mid and hind body region (Fig. 1G). ...
... Remarks. The O. (O.) lewisi holotype described in Song et al. (2005) was as follows (Song et al. 2005;Lewis 2010): 18 articles, with the basal 2.5-2.7 glabrous dorsally; with 3 teeth on each tooth plate, the inner two ones more or less fused; tergites with complete paramedian sutures from 5; marginate from S6 to S8, without keels or spines; sternites with complete paramedian sutures from 4 to 19; last sternite with sides converging caudally, posterior edge strongly concave, and central longitudinal depression; coxopleural process short, typically with 2 apical spines, 2 lateral spines and one dorsal spine; ultimate prefemurs with prominent spines on swollen bases. (2004) and Song et al. (2005) are same to the new immature materials examined in this paper. ...
... Remarks. The O. (O.) lewisi holotype described in Song et al. (2005) was as follows (Song et al. 2005;Lewis 2010): 18 articles, with the basal 2.5-2.7 glabrous dorsally; with 3 teeth on each tooth plate, the inner two ones more or less fused; tergites with complete paramedian sutures from 5; marginate from S6 to S8, without keels or spines; sternites with complete paramedian sutures from 4 to 19; last sternite with sides converging caudally, posterior edge strongly concave, and central longitudinal depression; coxopleural process short, typically with 2 apical spines, 2 lateral spines and one dorsal spine; ultimate prefemurs with prominent spines on swollen bases. (2004) and Song et al. (2005) are same to the new immature materials examined in this paper. ...
Otostigmus (O.) lewisiSong et al., 2005 was described from sub-adult specimens from Jiacha County (Xizang, China), but was synonymized by Lewis (2010) with the Nepalese species O. (O.) beroni Lewis, 2001. The latter was also recorded from Jilong County (Xizang, China) by Song et al. (2005). Following a comparison of O. (O.) beroni from Jilong County with new materials of O. (O.) lewisi from Jiacha County, we reaffirm that O. (O.) lewisi is a valid species.
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