Messageria scalarioides donghiana, Chen & Lin, 2021

Chen, Zhe-Yu & Lin, Li-Wen, 2021, Notes on the genus Messageria Bavay & Dautzenberg, 1904, with descriptions of a new speciesand anew subspecies (Gastropoda: Caenogastropoda: Cyclophoroidea Alycaeidae), Zootaxa 5067 (1), pp. 129-134 : 131-132

Messageria scalarioides donghiana Z.-Y. Chen & L.-W. Lin, n. ssp.

Figures 1E–H , 2A

Holotype: HBUMM 10058 , a big cave in mountains between Fengshan County [Hechi City] and Leye County [Baise City], Guangxi Zhuang Autonomous Region, China, ex coll. Hao Yang, 2012 . Paratypes: CZY/1, LLW/1, same data as holotype.

Etymology. This name comes from the local Zhuang language “dongh”, which means “cave”.

Diagnosis. This subspecies can be distinguished from the nominate subspecies by the larger shell and wider lower whorls and umbilicus. Also, the aperture of M. scalarioides donghiana n. ssp. and 1/8 whorl behind it evidently deviate from the axis and umbilicus.

Measurements. H = 3.70 mm, W = 3.37 mm, D A = 1.89 mm (holotype).

Vernacular name. Į梯Ħfiḏ洞Ë亚ḋ xuán tī chóng lèi luó dòng xué yà zhǒng

Distribution. CHINA: Guangxi.

Figures

FIGURE 1. Species of Messageria (A–M) and Helicomorpha (P–S). A–D. Messageria scalarioides (syntype, MNHN-IM- 2000-32414). E–H. Messageria scalarioides donghiana n. ssp. (holotype, HBUMM 10058) I–O. Messageria sinica n. sp. I–L. (holotype, HBUMM 10021). M. (paratype, HBUMM 10055). N–O. Opercula, outer side (N) and inner side (O) (holotype, HBUMM 10021) P–S. Helicomorpha turricula (lectotype, SMF 105304). Photos: Barna Páll-Gergely (A–D), Zhe-Yu Chen (E–O) and Sigrid Hof (P–S).

FIGURE 2. Protoconch of Messageria Bavay & Dautzenberg, 1904. A. Messageria scalarioides donghiana n. ssp. (holotype, HBUMM 10058) B. Messageria sinica n. sp. (holotype, HBUMM 10021) Photos: Zhe-Yu Chen.