Laeocathaica qiminglii Wu, 2023

Wu, Min, Shen, Wang & Chen, Zhong-Guang, 2023, Land snail diversity in central China: revision of Laeocathaica Moellendorff, 1899 (Gastropoda, Camaenidae), with descriptions of seven new species, ZooKeys 1154, pp. 49-147 : 49

Laeocathaica qiminglii Wu sp. nov.

Figs 2A, B , 35C, D , 48C, D , 49D , 51

Type material.

Holotype HBUMM08422-spec.1, fms, a slope near X496 (32.969442°N, 104.654191°E), Wenxian, Gansu Province; 2019-X-13; coll. Li, Q.-M.; DNA voucher HBUMM08422a. Paratypes HBUMM08422-spec.2, 1 animal with mature shell but immature genitalia, dissected; same data as holotype. HBUMM08448, 7 fms, east of town of Wenxian, 2020-VIII, coll. Chen, Z.-G.

Measurement of holotype.

Shell height 5.2 mm, maximum diameter 13.2 mm, aperture height 2.0 mm, aperture breadth 4.2 mm, umbilicus diameter 5.4 mm, protoconch whorls 11/2, whorls 75/8.

Diagnosis.

Protoconch without granules. Umbilicus extremely broad, ~ 1/2 of maximum diameter. Shell evenly pale brown with umbilicus side paler.

Description of shell.

Sinistral, fairly depressed, solid. Shell with 75/8-73/4 fairly flat whorls. Suture impressed. Spire depressed-cone-shaped. Protoconch 11/2 whorls, smooth on the first whorl where sculpture may be erased by weathering or erosion, followed by sparse radial threads. Protoconch visible through umbilicus. Growth lines unclear. Spiral grooves absent. After ~ 21/2 whorls, with regularly spaced thick ribs between which are many fine threads. Aperture oblique, peach-shaped, descending in front. Body whorl sharply carinate above periphery. Peristome seldom expanded and only slightly reflexed at lower part. Columella very oblique. Umbilicus very broad, ~ 1/2 of maximum diameter. Shell evenly pale brown with umbilicus side paler.

General anatomy.

Eversible head wart small but prominent. At mantle edge leaf-shaped appendage absent. On internal body wall of head region between ommatophorous insertions with neither glands nor tiny pits. Body greyish brown, central dorsum with pale longitudinal stripes. Sole dirty white. Jaw arcuate, with five projecting ribs.

Anatomy of genital organs.

Penial sheath present. Vagina between atrium and dart sac not elongate. Mucous glands four (observations of the genitalia of this species are only based on the paratype HBUMM08422-spec.2).

Etymology.

This new species is named after the collector Mr. Qiming Li.

Ecology.

In October, this species was found in the crevices of broken stones on dry slope.

Distribution.

Only known from the type locality.

Remarks.

This species has the strongest ribs on the shell surface and the broadest umbilicus of all species of Laeocathaica .

Figures

Figure 2. A distribution map of all known species of Laeocathaica Moellendorff, 1899 except L. anceyi (Moellendorff in Ancey, 1889), L. hisanoi Pall-Gergely, 2022, and L. leucorhaphe Moellendorff, 1899 whose precise localities are not known; white dots: the localities where no Laeocathaica species was ever found B distribution of the new species described in this paper, yellow dots: L. qingchuanensis Wu, sp. nov., green dot: L. zhengpingliui Wu, sp. nov., brown dots: L. parapolytyla Wu, sp. nov., white dot: L. qiminglii Wu, sp. nov., pink dot: L. cheni Wu, sp. nov., blue dots: L. qishilii Wu, sp. nov., orange dots: L. nordsiecki Wu, sp. nov. C distribution of L. carinifera (H. Adams, 1870) (green dots), L. qingchuanensis Wu, sp. nov. (yellow dots), and L. stenochone Moellendorff, 1899 (blue dots) D distribution of L. amdoana Moellendorff, 1899 (green dots), L. distinguenda Moellendorff, 1899 (pink dots), and L. tropidorhaphe Moellendorff, 1899 (blue dots) C equivalent to the larger box in (A), B, D equivalent to the smaller box in (A).

Figure 35. A, B Laeocathaica qishilii Wu, sp. nov. A holotype, HBUMM 08298 - spec. 1 B paratype, HBUMM 08298 - spec. 2 C, D L. qiminglii Wu, sp. nov. C holotype, HBUMM 08422 - spec. 1 D paratype, HBUMM 08448 - spec. 1.

Figure 48. SEM micrographs A, B Laeocathaica qishilii Wu, sp. nov., HBUMM 08298, paratype A protoconch B teleoconch C, D L. qiminglii Wu, sp. nov., HBUMM 08448, paratype C protoconch D teleoconch E, F L. phaeomphala Moellendorff, 1899, CZG 202008 - w 3, subadult E protoconch F teleoconch G, H L. filippina (Heude, 1882), HBUMM 04166 G protoconch H teleoconch I, J L. parapolytyla Wu, sp. nov., HBUMM 06640 - spec. 9, paratype I protoconch J teleoconch.

Figure 49. Habitats (excluding D) A, B Laeocathaica qishilii Wu, sp. nov., border of Jiuzhaigou County and Wen County C L. nordsiecki Wu, sp. nov., Guoyuanxiang, Jiuzhaigou D L. qiminglii Wu, sp. nov., an indoor photograph E L. qingchuanensis Wu, sp. nov., Dagou Nature Reserve, Qingchuan County F L. cheni Wu, sp. nov., Hengdan, Wenxian.

Figure 51. Bayesian phylogram of camaenid species (for detail see in Table 1) based on the concatenated partial mitochondrial 16 S and partial ITS 2 sequences. The tree is rooted with Helix pomatia. Numbers near nodes indicating Bayesian posterior probabilities and Maximum-likelihood bootstrap values are given as BPP ⁄ BP. Black or orange part shows the topology where the result yielded by using Bayesian-Inference method agrees with that by using Maximum-likelihood method or not, respectively. An asterisk indicates the branch is exactly one third shortened in length. Scale bar is for substitutions per site.