Philobrya alata Urcola & Zelaya, 2021

Urcola, Matias Ricardo & Zelaya, Diego Gabriel, 2024, The Genus Philobrya J. G. Cooper, 1867 (Bivalvia: Philobryidae) In Patagonia And Adjacent Antarctic Waters, Zootaxa 5437 (2), pp. 151-192 : 157-158

Philobrya alata Urcola & Zelaya, 2021

( Figure 3 )

? Philobrya wandelensis . Melvill & Standen, 1912: 146. (Not Lamy, 1906: 50, 51, fig. 4).

Philobrya alata Urcola & Zelaya, 2021: 28 , 29, fig. 4.

Remarks: Philobrya alata was recently described by Urcola & Zelaya (2021, p. 28, 29). It is an easily recognizable species due to its peculiar morphology: the ventral and posterior margin form an evenly convex curve and the posterior slope is wide and deep, giving the shell an alated appearance and high profile. In addition, P. alata shows an extremely short resilifer. Currently, the species is only known from the Atlantic coast of Patagonia at Tierra del Fuego, Isla de los Estados and Burdwood Bank, in a bathymetric range of 117‒286 m depth ( Urcola & Zelaya 2021).

Figures

FIGURE 3. Philobrya alata. A‒C, H, I, L, M: holotype (MLP-Ma 15117), D‒G, K: specimens from Isla de los Estados (D‒G: MACN-In 43530, K: MACN-In 43529), J: paratype (MACN-In 43525). A, B, D‒G: outer views right valve (A: with periostracum, B, D‒G: without periostracum), C: outer view left valve (without periostracum), H: inner view left valve, I: inner view right valve, J: brooded embryo removed from the demibranch of an adult specimen, K, L: hinge plates right valve (K: specimen of 2.5 mm L, L: specimen of 2.9 mm L), M: hinge plate left valve (specimen of 2.9 mm L). Scale bars A‒I: 1 mm; J: 100 µm; K‒M: 500 µm. (Figures 3A‒C, H‒M are reproduced from Urcola & Zelaya (2021)).