Caecum inflatulum Vannozzi, 2017

Walter, Angelo Vannozzi & Renda, Walter, 2024, Sampling the depth: New data on the Caecidae (Mollusca, Gastropoda) from northeastern Papua New Guinea, Zoosystema 46 (14), pp. 327-347 : 332

publication ID	https://doi.org/10.5252/zoosystema2024v46a14
publication LSID	lsid:zoobank.org:pub:23D972D0-F573-429C-816B-F42AFF02D0B1
DOI	https://doi.org/10.5281/zenodo.12548734
persistent identifier	https://treatment.plazi.org/id/038F87DD-FF80-FFEE-202C-FD0E3B2BC9CA
treatment provided by	Felipe (2024-06-26 14:40:18, last updated 2024-11-26 05:36:33)
scientific name	Caecum inflatulum Vannozzi, 2017
status

Treatment

Caecum inflatulum Vannozzi, 2017 View in CoL

( Fig. 2M, N View FIG )

Caecum inflatulum Vannozzi, 2017: 124 View in CoL , fig. 1E-L.

TYPE MATERIAL. — Holotype. Philippines • lv; Bohol Is ., Ubajan , 16 m depth; MNHN-IM-2000-33074 .

Paratypes. Philippines • 1 lv juv; Panglao Is. , Biking; 4 m depth; reef; MNHN-IM-2000-33075 • 4 lv, 2 sh; Balicasag Is .; 21 m depth; floor of cave with sponges; MNHN-IM-2000-33076 • 1 lv, 1 sh; Panglao Is., Pontod Islet ; 3 m depth; sand bottom with dead coral; MNHN-IM-2000-33077 .

TYPE LOCALITY. — Pacific Ocean, Philippines, Bohol Is., Ubajan, 16 m depth.

MATERIAL EXAMINED. — Papua New Guinea • 1 sh (fragm); New Ireland; KAVIENG 2014 Stn DW 4463; 2°44’S, 150°35’E; 240- 305 m depth; 3.IX.2014; MNHN GoogleMaps .

Indonesia • 1 sh; Kotok Island ; beached; 1985; coll. WR.

DISTRIBUTION. — Indonesia (new record), Philippines, northeastern PNG ( Vannozzi 2017, 2019b).

DIAGNOSIS. — Shell of average size for the genus, colourless, semitransparent and glossy. Protoconch unknown. Teleoconch tubular, slightly arched, with strong collabral rings. Early teleoconch subcylindrical. Adult shell subcylindrical, slightly arched, tapering toward the apex. Sculpture of rather well-developed rings of uneven width, vanishing in the late teleoconch. Completely smooth specimens occur. Aperture simple, slightly contracted, preceded by a slight swelling. Shallow longitudinal grooves sometimes occur. Septum protruding, convex, with a high dorsal nail-like mucro. The mucro shows a slight hump at half of its height. Animal described by Vannozzi (2019b). Length 2 mm.

REMARKS

Caecum inflatulum is a rather variable species, although the shape of the septum allows easy identification. This species can only be compared with C. attenuatum de Folin, 1880 and C. chinense de Folin, 1868 , both of them showing a similar septum. However, the former shows a sculpture of very fine rings and a differently-shaped aperture, while the latter shows a more conical and smooth shell with annular microsculpture ( Albano & Pizzini 2011; Vannozzi 2017).

References

ALBANO P. G. & PIZZINI M. 2011. - Notes on Caecidae (Mollusca: Gastropoda) from southern Mozambique, with the description of a new species. African Invertebrates 52 (1): 1 - 10. https: // doi. org / 10.5733 / afin. 052.0101

VANNOZZI A. 2017. - The family Caecidae (Mollusca: Gastropoda) from the Central Philippines. Bollettino Malacologico 53 (2): 121 - 149. https: // www. biodiversitylibrary. org / item / 278548

VANNOZZI A. 2019 b. - The family Caecidae (Mollusca: Gastropoda) from northern Papua-New Guinea. Bollettino Malacologico 55 (1): 72 - 104.

Figures

FIG. 2. — Caecum Fleming, 1813 species from deep-water stations from northeastern PNG: A, B, C. sepimentum de Folin, 1868 from Stn DW4463 (B: juvenile); C, D, C. sepimentum from Mactan, Philippines, beached (coll. WR); E-H, C. vertebrale Hedley, 1899 from Stn DW3754; I, J, C. japonicum (Habe, 1978) from Stn. DW4464; K, L, C. japonicum from Stn DW4463 (L, juvenile); M, C. inflatulum Vannozzi, 2017 from Stn DW4463; N, C. inflatulum from Kotok, Indonesia, beached (coll. WR). Scale bar: 1 mm, details not to scale.