Anauchen jokaii Gojšina & Páll-Gergely, 2025

Anauchen jokaii Gojšina & Páll-Gergely sp. nov.

Figs 10 J View Figure 10 , 22 View Figure 22 , 23 View Figure 23 , 37 View Figure 37

Type material.

Holotype. Vietnam • 1 shell (SH: 2.48 mm, SW: 2.31 mm); Nam Pia village, Hung Ba commune, Vi Xugen district , Ha Giang Province; 22°52.064'N, 105°4.814'E; 216 m a. s. l.; L. V. Hao, T. Ishibe, Y. Nakahara, K. Ohara, K. Okubo, J. U. Otani, V. P. Sang leg.; IEBR _LS_Anauchen.002 H. GoogleMaps

Type locality.

Vietnam, Nam Pia village, Hung Ba commune, Vi Xugen district, Ha Giang Province; 22°52.064'N, 105°4.814'E; 216 m a. s. l.

Diagnosis.

Anauchen species with conical shell, last whorl keeled at its base and slightly ascending near the aperture. Spiral striation absent. Aperture armed with four strong barriers, umbilicus narrow.

Description.

Shell conical, consisting of 5.5 regularly increasing, convex whorls separated by a deep suture. Colour light brown. There is not a clear boundary between the protoconch and the teleoconch due to the similar surface sculpture. Teleoconch pasty, very finely but irregularly radially striated, with no signs of spiral striation. Last whorl adnate to the penultimate and its last quarter slightly ascending near the aperture (~ 10 ° compared to the shell axis), making the aperture profile opisthocline to the shell axis. Last whorl with a blunt keel at its base, making the shell strongly triangular. Peristome continuous and thick, not very strongly expanded on the parietal side and not fully leaning on the penultimate whorl. It is slightly lighter in colour than the rest of the shell, not reflected. Sinulus rounded and well separated from the rest of the aperture. Aperture equipped with four strong but short barriers (parietal, upper palatal, lower palatal and columellar). Parietal lamella is the strongest in the aperture, blade-like. Upper palatal plica ~ 1 / 2 as strong as the parietal lamella and very slightly leaning towards the lower palatal plica. The latter is strong (only slightly weaker than the parietal) and moderately long. There is no basal plica. Columellar lamella thick and relatively low, situated in the middle of the columellar wall. All apertural barriers almost reach the expanding peristome. Surface of all apertural barriers is smooth. Umbilicus rounded, open but narrow, measuring ~ 1 / 11 of the shell width.

Differential diagnosis.

See under A. messageri , A. rochebruni , A. pentadens and A. turritus sp. nov.

Measurements

(in mm, n = 1). SH = 2.48; SW = 2.31; AH = 1.12; AW = 1.04.

Etymology.

This species is named after and dedicated to Mór Jókai (1825–1904), Hungarian novelist, dramatist, to commemorate the bicentenary of his birth. Jókai was interested in malacology, he had a large collection of (mostly marine) shells, and even published a satirical novel entitled “ Novel of snails ” (A csigák regénye).

Distribution.

Only known from the type locality.