Philobrya sanjuani Urcola & Zelaya 2021

• Main Authors: Urcola, Matias Ricardo, Zelaya, Diego Gabriel
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2024
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Bivalvia; Arcida; Philobryidae; Philobrya; Philobrya sanjuani; Antarc*; Antarctic
• Online Access: https://doi.org/10.5281/zenodo.10984667; http://treatment.plazi.org/id/A279878B741AD21DF5EAE69CFCB7F967

Philobrya sanjuani Urcola & Zelaya, 2021 (Figure 16) Philobrya sanjuani Urcola & Zelaya, 2021: 26, 27, fig. 3. Remarks: Philobrya sanjuani was recently described by Urcola & Zelaya (2021, p. 26, 27) thus being unnecessary to redescribe it herein. The species is characterized by having a delicate, modioliform shell with short anterior dorsal margin, narrow posterior slope, a microscopically pitted prodissoconch, and a cancellate dissoconch, covered with a thin, yellowish white periostracum, forming fine radial folds. As mentioned in the original description, Philobrya sanjuani is most similar to P. wandelensis (Fig. 18), from which it differs by having a shorter anterior portion of the dorsal margin, more markedly differentiated dorsal slope, narrower radial periostracal folds, and smaller prodissoconch and resilifer (Appendix 1). Other similar species in general shell outline are Philobrya atlantica (Fig. 4), P. brattstromi (Fig. 8) and small-sized specimens of P. blakeana (Fig. 6). Philobrya sanjuani differs from all these species by having a smaller resilifer, shorter periostracal setae, and a pitted prodissoconch (Appendix 1). Philobrya sanjuani remains at present only known from its type locality, at Shag Rocks, 313 m depth. Published as part of Urcola, Matias Ricardo & Zelaya, Diego Gabriel, 2024, The Genus Philobrya J. G. Cooper, 1867 (Bivalvia: Philobryidae) In Patagonia And Adjacent Antarctic Waters, pp. 151-192 in Zootaxa 5437 (2) on page 180, DOI:10.11646/zootaxa.5437.2.1, http://zenodo.org/record/10984619