Lanayrella, Salvador & Cunha, 2020

Salvador, Rodrigo B. & Cunha, Carlo, 2020, Lanayrella, a new Acteonidae genus (Gastropoda, Heterobranchia) from Tierra del Fuego, Journal of Natural History 54 (15 - 16), pp. 1009-1018 : 1010-1011

Lanayrella gen. nov.

Type species

Tornatella vagabunda Mabille, 1885 .

Included species

Lanayrella ringei ( Strebel, 1905) , Lanayrella vagabunda ( Mabille, 1885) .

Etymology

Named after the Lanayru Sea from the game ‘The Legend of Zelda: Breath of the Wild’ (Nintendo Co., Ltd.), following the precedent set by Salvador and Cunha (2016) when naming a new acteonid genus after a fictional city. Gender: feminine.

Diagnosis

Protoconch fully immersed within the shell. Columellar region of aperture platform-like, with a sharp adapical fold.

Description

Shell acteonoid, thick, elongated; last whorl with slightly rounded profile; imperforate; D/ H ca. 0.5. Spire with slightly rounded whorls and faintly step-like profile; suture distinctly marked. Protoconch indistinct, nucleus fully immersed ( Figures 1 (g) and 2(h)). Teleoconch with ca. 4.5 whorls, entirely sculptured by narrow punctuated spiral grooves; grooves are more numerous in later whorls and more closely packed together towards umbilicus ( Figures 1 (c) and 2(c)). Grooves composed of small rounded-rectangular punctae, partially fused to the next one within each groove; punctae remain individually distinct or more completely fuse with their neighbours ( Figures 1 (f) and 2(g)). Aperture anteriorly rounded, slightly narrowed posteriorly; parietal region with thin well-delimited callus; columellar region broad, slightly expanded, with a sharp edge, bearing a thickened adapical fold; outer lip sharp, thickened externally.

Figures

Figure 1. Lanayrella vagabunda, syntype; H = 8.2 mm. A. Apertural view. B. Dorsal view. C. Apertural view, under SEM. D. Detail of spire top showing teleoconch sculpture. E. Apical view, under SEM. F. Detail of body whorl showing teleoconch sculpture under SEM. G. Detail of spire top, under SEM, showing fully immersed protoconch. Scale bar = 200 μm.