Otostigmus (O.) lewisi Song, Gai, Song & Zhu, 2005 (Revalidated name)

Liu 1, Xiaoshuang, Li *, Yixuan & Di, Zhiyong, 2022, The revalidation of Otostigmus (O.) lewisi Song et al., 2005 (Scolopendromorpha, Scolopendridae) based on new material from Jiacha County, China, ZooKeys 1088, pp. 41-52 : 41

publication ID	https://dx.doi.org/10.3897/zookeys.1088.77703
publication LSID	lsid:zoobank.org:pub:41B17D93-ABBB-49F3-B15A-B4F24D18753F
persistent identifier	https://treatment.plazi.org/id/80F267B0-9D5B-5FC6-A29B-D11CC060ACBE
treatment provided by	ZooKeys by Pensoft
scientific name	Otostigmus (O.) lewisi Song, Gai, Song & Zhu, 2005 (Revalidated name)
status

Treatment

Figs 2 View Figure 2 , 3 View Figure 3 , 4D View Figure 4

Otostigmus lewisi Song et al, 2005: 304.

Material examined.

Ar.-MHBU-SoJC1908060301- Ar.-MHBU-SoJC1908060307: Jiacha County ( Gyaca County ), Xizang (Tibet), China, 29.0857°N, 92.3430°E, 6/8/2019, leg. Zhiyong Di. Ar. -MHBU-SoJC1608DX01: Jiacha County , Xizang, China, 29.1188°N, 92.6969°E, 12/8/2016, leg. Zhiyong Di. Ar. -MHBU-SoJC1608120401: Jiacha County, Xizang, China, 29.1387°N, 92.6880°E, 12/8/2016, leg. Zhiyong Di. Housed in MHBU GoogleMaps .

Diagnosis.

Maximum length 77 mm. Antennae 17-20 articles, basal 2.2-3 glabrous dorsally (Fig. 2C, F View Figure 2 ). With 3 or 4 teeth on each tooth plate, the median two more or less fused (Figs 2F View Figure 2 , 3C View Figure 3 ). Sternites with paramedian sutures. Coxopleural process typically with 2 apical spines, 1-2 lateral spines and 1-2 dorsal spines (Figs 2H View Figure 2 , 3D View Figure 3 ). Ultimate prefemur with 4 rows of prominent spines, disposed on swollen bases (7-19 in total) (Fig. 2E, H View Figure 2 ).

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.

Following Song et al. (2005), Lewis (2010) considered that there were minor differences between O. (O.) lewisi and O. (O.) beroni ; however, the description and figures of O. (O.) lewisi were not consistent in Song et al. (2005), as the authors mistakenly reused the figures of O. (O.) martensi ( Song et al. 2005: figs 34-40) for O. (O.) lewisi ( Song et al. 2005: figs 47-53). This can be verified by checking the information of O. (O.) lewisi ( Song 2004: 58-59, fig. 42) and O. (O.) martensi ( Song 2004: 57, fig. 40) provided in Song’s unpublished thesis.

Song et al. (2005) recorded that O. (O.) lewisi is similar to O. (O.) beroni , and distinguished O. (O.) lewisi from the latter by the length of coxopleural process and the shape of the ultimate sternite. Because Lewis (2010) didn’t refer to the unpublished thesis of Song (2004), the misleading figures of O. (O.) lewisi in Song et al. (2005) led Lewis to conclude that there are no significant differences between the two species and that O. (O.) lewisi is a junior subjective synonym of O. (O.) beroni ( Lewis 2010).

The characteristics of the holotype of O. (O.) lewisi reported by Song (2004) and Song et al. (2005) are same to the new immature materials examined in this paper. Therefore, we considered that all the type materials of O. (O.) lewisi described previously were sub-adults.

Description

(Ar.-MHBU-SoJC1908060301). Length: 70 mm (measured from anterior margin of cephalic plate to posterior margin of tergite 21).

Pigmentation (after remaining in alcohol for two years): cephalic plate and tergites yellow with light green; antennae and legs yellow; penultimate legs and ultimate legs green (Fig. 2A, B View Figure 2 ). Live individual (Ar.-MHBU-SoJC1608DX01): antennae light blue mainly, cephalic plate and tergites brownish, penultimate legs and ultimate legs yellow with blue middle part in each segment, the rest of the legs yellow (Fig. 4D View Figure 4 ).

Cephalic plate: wide 3.86 mm, long 3.18 mm, rounded anteriorly, without sutures or sulci (Fig. 2C View Figure 2 ).

Antennae: with 17 articles on the right and 19 on the left antenna, basal 2.5 glabrous, the remainder covered with short, tapering, yellowish hairs (Fig. 2C, F View Figure 2 ).

Forcipular segment: forcipular tooth plates present, with 3 teeth on each plate, the median two fused, their basal sutures form right angle, process of forcipular trochanteroprefemur well developed (Fig. 2F View Figure 2 ).

Tergites (T): with complete paramedian sutures from 4 to 20; marginate from 6 to 21 (Fig. 2D View Figure 2 ); the posterior border of T21 slightly convex (Fig. 2E View Figure 2 ).

Sternites (S): smooth, with incomplete paramedian sutures from 3 to 4, complete paramedian sutures from 5 to 19 (Fig. 2G View Figure 2 ); S21 with a slight median longitudinal depression and converging posteriorly (Fig. 2H View Figure 2 ). Central part of the posterior border of S21 slightly concave.

Coxopleuron: pore field with numerous pores, coxopleural process moderately long and apical border with protuberance. With pore-free longitudinal strip in pore field. Coxopleural process with 2 apical spines, 1 lateral spine and 1-2 dorsal spines (Fig. 2H View Figure 2 ).

Legs (L): L2-9, right L11 and left L12 with 2 tarsal spurs; 1 tarsal spur on subsequent to penultimate legs; L1 and left L2 with 1 tibial spur and right L1 with 1 femoral spur.

The left prefemur with 1 corner spine, 3 ventro-lateral spines, 1 ventro-medial spines, 2 medial spines, 1 dorso-medial spine; the right prefemur with 2 corner spines, 5 ventro-lateral spines, 2 ventro-medial spines, 7 medial spines, 3 dorso-medial spines (Fig. 2E, H View Figure 2 ).

Variability.

Adult and juvenile individuals differ primarily in body length and pigmentation (Figs 2A, B View Figure 2 , 3A, B View Figure 3 ). There are differences among individuals as described below. Antennal articles 17-20. The number of teeth of forcipular tooth-plates 3+3 (5 specimens) (Fig. 2F View Figure 2 ) or 4+4 (the lateral one with a small tooth on its lateral side) (4 specimens) (Fig. 3C View Figure 3 ). Tergites with paramedian sutures from 3 (3 specimens) or 4 (5 specimens), from 6 (1 specimen), marginate from 3-8. Sternites with paramedian sutures from 2 (4 specimens), 3 (4 specimens) or 4 (1 specimen). Coxopleuron process with 4-6 spines (2 apical spines, 1-2 lateral spines and 1-2 dorsal spines). One tibial spur on L1-2 (6 specimens) or only L1 (3 specimens). The number of tarsal spurs on legs has no regularity. Two tarsal spurs on L1(2)-9 (4 specimens), L1-12(13) (3 specimens), L1-16 and L18 (1 specimen) or L1,3,5-6&8-15 (1 specimen). One tarsal spur on subsequent to penultimate legs. Ultimate legs without tarsal spur. Ultimate leg prefemur with 8-11, rarely 18 or 19 spines (2-5 ventro-lateral, 1-2 ventro-medial, 2-4 or 7 medial and 1-3 or 6 dorso-medial and 1 corner spine, rarely 2 corner spines) (Table 2 View Table 2 ).

Habitat.

Found under stones in arid mountain bush (Fig. 4B View Figure 4 ).

Distribution.

China (Xizang) (Fig. 5 View Figure 5 ).