Ceratophysella duplicispinosa ( Yosii, 1954 )

Jiang, Jigang, Yin, Wenying, Chen, Jianxiu & Bernard, Ernest C., 2011, Redescription of Hypogastrura gracilis, synonymy of Ceratophysella quinidentis with C. duplicispinosa, and additional information on C. adexilis (Collembola: Hypogastruridae), Zootaxa 2822 (1), pp. 41-51 : 50

Ceratophysella duplicispinosa ( Yosii, 1954)

Fig. 6

Hypogastrura duplicispinosa Yosii, 1954: 781

Chinogastrura punctata Rusek, 1967: 186

Chinogastrura quinidentis Jia, Shi & Chen, 2005: 241 new synonym

Ceratophysella quinidentis Jia, Skarży ṅski & Li 2010: 61

Material examined. Ceratophysella quinidentis male holotype, 2 female and 2 immature male paratypes, 55 additional juveniles, Nanjing University , Nanjing City, Jiangsu Province, China, 26 February 1990, K. Christiansen, coll., deposited in Nanjing University as #8118 .

Ceratophysella duplicispinosa . Two females, Zhejiang Province, core area of Western Tianmu Mountain, 14 Apr. 2005, coll. Chen et al., No. C9248; 3 males, 1 female from Hunan Province, Changde City, Huayanxi Forest Park, 27 Oct. 2005, Coll. Jigang Jiang, No. 9294; 3 males and 2 juveniles, Guangdong Province, Heshan Hilly Land Interdisciplinary Experimental Station, Chinese Academy of Science , 15 Sept. 2006, Coll. Chen et al.

Remarks. The type specimens of C. quinidentis agree well with the description of C. duplicispinosa ( Yosii 1954) , as well as that of Russian specimens ( Babenko et al. 1994). Reexamination of the C. quinidentis type material verified the presence of a trilobed apical bulb on Ant. IV and ventral file of 20–25 truncate setae ( Fig. 6B ), and the presence of a typical Ceratophysella labrum ( Fig. 6C ). However, some characters of C. quinidentis were inaccurately described. The fourth antennal segment was found to have 5 rather than 3 sensilla ( Fig. 6A ). The unguis possesses proximal and distal lateral teeth ( Fig. 6D ). With regard to tenacular teeth, one specimen has 5+5 teeth, another has 4+5 teeth, and the rest have 4+4 teeth. The dens is strongly granulate dorsally and has 7 setae, of which 2 are thickened ( Fig. 6E ).

The comparison of C. quinidentis with C. duplicispinosa ( Jia et al. 2005, Table 1) contained several errors. For instance, C. duplicispinosa was cited as having 4 dorsal manubrial setae and 6 dental setae, and lacking ventral file setae on Abd. IV. However, Ceratophysella duplicispinosa has 20–35 setae present in the antennal file, 6−7 setae on the dens ( Babenko et al. 1994, Rusek 1967, Yosii 1954), and at least 8 setae on each side of the manubrium ( Yosii 1954). Mature specimens from Zhejiang, Hunan and Guangdong have 20–30 sensilla present in the ventral file of Ant. IV, while immature specimens usually have fewer than 15 setae in the file. Based on the analysis of the type specimens, there are no characters left that separate these two taxa. The best diagnostic character for this species is the transformation of the p 1 setae of Abd. V to thick spines. Therefore, we consider C. quinidentis a junior synonym of C. duplicispinosa .

Figures

FIGURE 6. Ceratophysella quinidentis type specimens (= C. duplicispinosa): A, Third and fourth antennal segments, dorsal view; B, Third and fourth antennal segments, ventral view; C, Labrum; D, Apex of tibiotarsus; E, Furca, dorsal view of right side.