Dentichloritis brevidens (Sowerby I, 1841)

Pall-Gergely, Barna & Neubert, Eike, 2019, New insights in Trichochloritis Pilsbry, 1891 and its relatives (Gastropoda, Pulmonata, Camaenidae), ZooKeys 865, pp. 137-154 : 145-146

Dentichloritis brevidens (Sowerby I, 1841) Figs 13-14

Helix brevidens Sowerby I, 1841: 25.

Trichochloritis brevidens : Schileyko 2007: 2113-2114, fig. 2032b, c.

Type specimens examined.

Philippines, m.c. (Museum Cuming), 3 syntypes NHMUK 20190452 (D of photographed shell = 19.5 mm [ Fig. 13 ]).

Type locality.

Philippines, Puerto Galero (Municipality of Puerto Galera, municipality in the province of Oriental Mindoro).

Diagnosis.

A middle-sized, yellowish species with a slender reddish peripheral belt, short hairs on the entire shell, nearly closed umbilicus (only visible in oblique view), and a slight thickening (denticle) on the basal part of peristome.

Description.

Shell medium sized, depressed globular; body whorl rounded with slight indication of a blunt shoulder; last quarter to half whorl with a very shallow subsutural furrow; the 3.75-4 whorls are separated by a shallow suture; colour yellowish to ochre with a reddish slender belt above shoulder (midpoint of body whorl); protoconch consists of 1.5-1.75 whorls, finely granulate, with fine radial wrinkles; teleoconch covered by short hairs or hair scars, which are visible to the naked eye as well; aperture semilunar; peristome expanded and slightly reflected, and reinforced by a thickened whitish brown lip; a slight swelling (denticle) visible on basal part of peristome, between the midpoint of the basal peristome and the columella; parietal region with an inconspicuous layer, which is matter than the rest of the shell; umbilicus nearly closed by columellar reflection, visible only by oblique view.

Anatomy: Penis very thick-walled, with narrow lumen, internally with short plicae in basal part and very large conic tubercles in main chamber; flagellum and epiphallus absent; vas deferens rather long, evenly thin down to atrium; approximately one third way up it is attached to penis, and after penis is enlarged and fusiform, then in becomes very thin, thread-like, forming a sharp curvature and passes to penis, gradually enlarging; penial retractor attached to curvature of vas deferens and continues as a fine membrane down to middle part of penis; penial sheath thin, surrounds upper two third part of penis. Vagina shorter than penis, thick; spermatheca without visible division to stalk and reservoir, not attending albumen gland and provided with apical ligament (based on Schileyko 2007: 2113-2114, fig. 2032b, c).

Figures

Figures 13 - 14. Dentichloritis brevidens 13 syntype Helix brevidens Sowerby I, 1841, NHMUK 20190452, D = 19.5 mm 14 Morphology of the genital organs of Dentichloritis brevidens; modified after Schileyko (2007).