Cyrtopleura costata ( Linnaeus, 1758 )

Stakowian, Nicole & Simone, Luiz Ricardo L., 2021, Morphological description of Cyrtopleura costata (Bivalvia: Pholadidae) from southern Brazil, Papéis Avulsos de Zoologia 61, pp. 1-7 : 2

Cyrtopleura costata ( Linnaeus, 1758) ( Figs. 1-2 )

Pholas costatus: Linnaeus, 1758: 669 ; Lamarck, 1818: 445; 1835: 45; Tryon, 1862: 201; Schepman, 1887: 156, 164.

Capulus shreevei: Conrad, 1869: 105 , pl. 13, fig. 3.

Scobina costata: Bayle, 1880: 242 .

Pholas (Barnea) costatus: Linnaeus, 1759 (sic): Grant & Gale, 1931: 431.

Cyrtopleura (Scobinopholas) costata: Turner, 1954: 35 , pls. 17-18; Altena, 1968: 156, 176; 1971: 78, pl. 6, figs. 10-11; Pacaud, 1998: 64-65, figs. 21-22.

Cyrtopleura costata: Perry & Schwengel, 1956: 94 , pl. 19, fig. 124; Moore, 1961: 49; Turgeon, 1968: 71, fig. 43; Hoagland, 1983: 44; Spencer & Campbell, 1987: 54, pl. 9, figs. 19-20.

Material examined: EUA. Florida, Pierce, Bathtub Beach, MZSP 46850 , 1 shell. BRAZIL. Bahia, Ilhéus, OlivenÇa, MZSP 101530 , 1 shell ; Rio de Janeiro, Ibicuí, Almirante Aratanha, MZSP 144243 , 1 shell ; São Paulo, Iguape, MZSP 20106 , 1 shell ; Paraná, Baía de Paranaguá, Comunidade de São Miguel , MZSP 143461 , 8 specimens .

Distribution: From eastern Canada, USA, México, Cuba, and South America, from Venezuela to southern Brazil ( Rios, 2009; Velásquez, 2017; Cullain et al., 2018).

Figures

Figure 1. Shell and anatomic aspects of Cyrtopleura costata (MZSP 143461): (A) valves and accessory plates,external view;(B) left valve,internal view;(C) ventral whole view; (D) dorsal whole view; (E) left whole view; (F) left outer hemipalp cross section;(G) detail of location of accessory plates,anterior region, dorsal view; (H) left valve showing where flaps of mantle are inserted in region just posterior to umbo;(I) siphon in situ opening out of gallery;(J) incurrent siphon tip, opened longitudinally;(K) incurrent siphon margin detail.Scale bar:A-I = 1 cm;J, K = 1 mm.

Figure 2. Cyrtopleura costata general anatomy:(A) whole right view shell removed;(B) pallial cavity whole, fusion of both mantle lobes sectioned longitudinally, rightmantle lobe removed;(C) digestivesystem insitu,right view,topologies of some adjacentstructures alsoshown;(D) siphons,transversesection intheirmiddle level; (E) pericardial region, dorsal view; (F) visceral ganglia lateral view; (G) cerebropleural ganglia lateral view; (H) labial palp profile in cross section; (I) flaps of mantle in region just posterior to umbo, right view; (J) transverse section of right mantle edge; (K) gill, cross section at mid-region.Scale bar: A-C, E, I = 1 cm; D,J, K = 2 mm; F,G = 1 mm; H = 200 µm.