Triphoris (Mastonia) collaris Hinds, 1843

Albano, Paolo G., Bakker, Piet A. J. & Sabelli, Bruno, 2019, Annotated catalogue of the types of Triphoridae (Mollusca, Gastropoda) in the Natural History Museum of the United Kingdom, London, Zoosystematics and Evolution 95 (1), pp. 161-308 : 161

Triphoris (Mastonia) collaris Hinds, 1843

Figure 25

Triphoris (Mastonia) collaris Hinds 1843a: 23, not illustrated.

Type locality.

Island of Corregidor, Philippine Islands.

Type material.

Syntypes: NHMUK 196518: 1 specimen, Philippines (H. coll. H. Cuming) .

Original description.

Tri. (Mastonia) testâ ovatâ, acuminatâ; anfractibus duodecim biseriatim granulosis, serie inferiore paululùm maximâ, margaritaceâ, superiore pallidè fuscâ; anfractu ultimo quadriseriatìm subaequaliter catenato. Axis 4 lin.

Hab. Island of Corregidor, Philippine Islands.

Found among coarse sand at a depth of six fathoms. Many of these small shells have received an injury which has destroyed the mouth, and the present specimen has not escaped.

Translation of the Latin text.

Triphora (Mastonia) with ovate pointed shell; 12 whorls with two series of granules, the lower a little bit larger, pearly, the upper faintly brown; last whorl with rather equal four cords. Height 4 lines.

Diagnosis.

The examined syntype is 6.6 mm high. Shell cyrtoconoid, with flat whorls. The examined specimen lacks the apical part, but it has 11 whorls with two spiral cords ornamented by large tubercles at the intersection with prosocline axial ribs. A third very fine cord is visible below the first one on the last two to three whorls. Among the main cords, numerous finely tuberculated narrow spiral cords can be seen. Peristome and apex missing. Moderately long siphonal canal. The base has two additional, weakly granulated, spiral cords. The teleoconch has the upper spiral cord brown with paler tubercles and the lower spiral cord white. The last whorl has a distinct pattern of white tubercles and brown interspaces.

Remarks.

The locus typicus of T. collaris is the Island of Corregidor in the Philippines. Although this locality is indicated in modern labels accompanying this lot in the NHMUK, an old label reports "Sandwich I." (Fig. 25F ). Hinds stated in the original description the existence of several specimens and we can assume that this specimen is a syntype, although not topotypic. In the same lot, two more specimens were present, but they belong to completely different species, as already annotated by S.P. Dance in 1965.

Figures

Figure 25. Triphoris collaris Hinds, 1843, Baclayon, Bohol Island, Philippines, coll. H. Cuming. A-F Syntype NHMUK 196518: front (A, B), side (C), back (D), microsculpture (E), original labels (F). Scale bars: A-D: 1 mm; E: 0.5 mm.