Photinastoma taeniatum (Sowerby I, 1825)

Rosenfeld, Sebastian, Aldea, Cristian, Mansilla, Andres, Marambio, Johanna & Ojeda, Jaime, 2015, Richness, systematics, and distribution of molluscs associated with the macroalga Gigartina skottsbergii in the Strait of Magellan, Chile: A biogeographic affinity study, ZooKeys 519, pp. 49-100 : 63-64

Photinastoma taeniatum (Sowerby I, 1825) Fig. 5C

Material examined.

1 spm (10 × 12 mm).

Synonymy.

See Powell (1951).

Remarks.

Powell (1951) stated that the subspecies Photinastoma taeniatum nivea Cooper & Preston, 1910 presented uncommon characteristics compared to the typical form of the species, not presenting the same color pattern and a higher spire with more globular whorls, but both forms have three spiral whorls in the first whorl of the protoconch. Similarly, Castellanos and Landoni (1989) mentioned that these characteristics had been used by Powell (1951) to identify difference on generic level between those species of Photinastoma and Calliostoma , which were similar. Given this, they estimated that the species should be included within the genus Calliostoma . However, according to Rosenberg (2012), this species should be included under the genus Photinastoma .

Distribution.

Magellanic: Strait of Magellan ( Castellanos and Landoni 1989, Ríos et al. 2003): Punta Arenas ( Rochebrune and Mabille 1889), Punta Santa María (this record), and western entrance of the Strait of Magellan ( Osorio 1999); Santa Cruz River ( Powell 1951) and Malvinas/Falkland Islands ( Strebel 1908) in Port Stanley ( Strebel 1908, Powell 1951). SO: South Georgia Island ( Davolos and Moolenbeeck 2005).