Polylobosoma corollifera, Chen & Zheng & Jiang, 2023

Chen, Hui-Ming, Zheng, Chang-Bin & Jiang, Xuan-Kong, 2023, The millipedes (Diplopoda) in Yintiaoling National Natural Reserve, Southwest China, Zootaxa 5257 (1), pp. 49-81 : 67-68

publication ID

https://doi.org/ 10.11646/zootaxa.5257.1.6

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scientific name

Polylobosoma corollifera

sp. nov.

Polylobosoma corollifera sp. nov.

Figs 23–25 View FIGURE 23 View FIGURE 24 View FIGURE 25

Type materials. Holotype male: China, Chongqing, Wuxi County, Yintiaoling National Nature Reserve, Huangcaoping , 31°25’7.20” N, 109°55’59.33” E, alt. 2098 m, 20 August 2022, X.K. Jiang & H.M. Chen leg. GoogleMaps Paratypes: 2 females, same data as holotype GoogleMaps ; 1 male, Yintiaoling National Nature Reserve , Linkouzi, 31°28’19.47” N, 109°52’58.34” E, alt. 1680 m, 17 August 2022, X.K. Jiang & H.M. Chen leg GoogleMaps ; 2 females, Yintiaoling National Nature Reserve , Shizhuzi, 31°32’4.68” N, 109°42’16.26” E, alt. 2210 m, 11 August 2022, X.K. Jiang & H.M. Chen leg. GoogleMaps

Diagnosis. This species is very similar to Polylobosoma panda (Golovtach, 2009) from Foping Nature Reserve, Shaanxi Province, China. It can be distinguished from the latter by the tips of the solenomere and the solenophore pointed laterally ( Figs 24 View FIGURE 24 , 25 View FIGURE 25 ), not caudally as in P. panda .

Etymology. This specific name is an adjective Latin word, meaning ‘coronal’ and refers to the shape of the solenophore of the gonopod.

Description. Length ca. 43–46 mm (male), 44–45 mm (female), width of midbody pro- and metazona 4.0– 4.1 mm and 5.8–6.1 mm (male), 5.0– 5.2 mm and 6.1–6.3 mm (female), respectively. Head and dorsum of the body black, paraterga whitish or light yellow, venter and legs reddish brown ( Fig. 23 View FIGURE 23 ).

Clypeolabral region poorly setose, vertex glabrous, epicranial suture distinct. Antennae slender, antennomeres 2–7 clavate. Lengths of antennomeres: 3≥2≥4≥5≥6>1>7. Collum glabrous ( Fig. 23A View FIGURE 23 ). Paraterga only slightly declivous, broadly rounded, and narrowly bordered ( Fig. 23A, B View FIGURE 23 ). Postcollum constriction moderate ( Fig. 23A View FIGURE 23 ). Tegument of metaterga shining, rough, and leather-like; prozona and metazona below paraterga smooth.Axial line barely visible both on pro- and metazona. Paraterga strongly developed, broad, subhorizontal, located in the middle of body segment in lateral view ( Fig. 23A, B View FIGURE 23 ). Ozopores evident, lateral, lying in an ovoid groove at about 1/ 3 in front of caudal corner. Pore formula normal. Transverse sulcus evident reaching base of paraterga on metaterga 5–17, absent in metaterga 2–4. Stricture between pro- and metazona narrow and shallow, evidently beaded at bottom down to base of paraterga. Sterna sparsely setose, without modifications, but with a small, rounded cone between male coxae 4 ( Fig. 23C View FIGURE 23 ). No conspicuous ridge in front of gonopod aperture. Legs long and slender, obviously longer than body height. Prefemora without modifications. Epiproct conical, flattened dorsoventrally, apical papillae well-developed ( Fig. 23D View FIGURE 23 ). Hypoproct arch shaped.

Gonopods simple ( Figs 24 View FIGURE 24 , 25 View FIGURE 25 ). Coxa subcylindrical, poorly setose distodorsally ( Figs 24A, C View FIGURE 24 ; 25A, C View FIGURE 25 ). Prefemora densely setose, about 1/3 as long as acropodite ( Figs 24 View FIGURE 24 , 25 View FIGURE 25 ). Femorite slender, slightly curved and not enlarged distad, without a lateral sulcus ( Figs 24 View FIGURE 24 , 25 View FIGURE 25 ). Tip of femorite present one small lobe ( Figs 24A, B View FIGURE 24 ; 25A, B View FIGURE 25 ). Solenophore obviously bent. Anterior margin of solenophore expanded anteriorly, corona-shaped ( Figs 24 View FIGURE 24 , 25 View FIGURE 25 ). Tip of solenophore deeply trifid, all branches with a sharp tip. Solenomere about as long as solenophore, flagelliform ( Figs 24B, C View FIGURE 24 ; 25B, C View FIGURE 25 ).

Distribution. Known only from the type locality.

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