Canglangia heyuemingi H. Zheng, H. - Q. Xiang, L. - J. Zhang & X. - P. Wu sp. nov.

Figs 4, 5, 6

Material examined. •

Holotype: NCU_CLH 251001, shell height 1.52 mm, shell width 1.07 mm (Fig. 4 A), a spring near the Pudu River, Luquan Yi and Miao Autonomous County, Kunming City, Yunnan Province, China, 25.8925°N, 102.7411°E, in August 2025. • Paratypes: 3 specimens, NCU_CLH 251002 –04, shell height 1.50–1.56 mm, shell width 1.07–1.14 mm (Fig. 4 B – D), locality and habitat same as holotype.

Diagnosis.

Same as the genus.

Description.

Shell minute, dextral, oval, thin but solid, white and transparent; mostly with four to five whorls, protoconch whorl upper side covered with many lines of regularly distributed large, square-scale-shaped protuberances; teleoconch without complex microsculpture, with fine growth lines; body whorl large (Fig. 4 A – D, 5 A – C). Aperture oval; inner lip upper part with developed teeth; outer lip thin but solid; developed posterior canal (Figs 4 E, 5 A). Umbilicus close. Nacre not smooth (Figs 4 A – D, 5 A), with many short line bumps.

Operculum (Fig. 5 D) corneous, thin and fragile, kidney-shaped, transparent yellow in color; inner opercular region long crescent, with two different projections on the upper and lower part of the inner opercular region; upper projection little longer than lower projection, the lower end of upper projection and upper end of lower projection both pointing to the central of inner margin; enamel region flat and smooth, inner enamel region narrow and thickened; marginal region very thin and fragile.

Radula (Fig. 5 E, F) central tooth bearing one broad central denticle and one small sharp cusp on either side and with two to three small sharp cusps on central tooth base either side; lateral teeth with four to five cusps on the inner side and six cusps on the outer sides; inner marginal teeth with 23–25 cusps, outer marginal teeth with 19–21 cusps.

Snout slender, greyish white; tentacles slender, white. Soft body transparent pale grey. Mantle smooth, black; penis translucent white, coiled; foot small, anterior part expanded laterally and anterior edge indented (Fig. 4 F).

Etymology.

The name of this species is in honor of Mr He Yueming, a conchologist who collected the specimens. The Vernacular name is 何氏沧浪螺 (he shi cang lang luo).

Habitat and distribution.

This species has been found only in springs near the aforementioned locality, where it lives on rocks and wood in shallow water (Fig. 6).