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PhotogalleryHolotype of Lankacythere reticulata Khosla & Nagori, 1989
Description SEM of the left valve of the holotype. Image taken from the original description. Name: From Latin reticulatus, meaning made like a net; with reference to surface ornamentation. Material: Two complete carapaces and 20 open valves from Padappakkara. Type level and locality: Sample PD/2, light grey, sandy clay, Quilon beds, Lower Miocene. Padappakkara, Kerala, India. Description: Carapace elongate, subrectangular in lateral outline, with greatest height at anterior cardinal angle; left valve larger than right valve, overlapping distinctly along dorsal and posterodorsal margins; dorsal margin straight, left valve with anterior hinge ear;ventral margin slightly concave near middle; anterior margin broad and obliquely rounded, fringed with 16-17 minute spines; posterior margin subangulate, sloping down in upper part and rounded in lower part bearing 5-6 spines; in dorsal view carapace roughly biconvex, with maximum width posterior to middle. Eye spot distinct. Valve surface ornamented by deep reticulation, meshes arranged more or less in concentric pattern. Inner lamella of moderate width; line of concrescence and inner margin coincide; selvage at some distance from outer margin; a distinct flange groove in right valve; marginal pore canals simple and straight, about 22-23 along anterior margin and 9-10 along posterior margin. Central muscle scars comprise a vertical row of four adductor scars and a v-shaped frontal scar. Hinge amphidontl heterodont; in right valve it consists of a strongly projecting stirpate anterior tooth, a postadjacent deep socket, followed by a posteromedian finely crenulate groove and then a pessular posterior tooth; hinge complementary in left valve. Dimensions: Holotype (No. 365), a left valve, length 0.84mm, height 0.47mm. PNG file - 58.52 kB - 231 x 171 pixels added on 2023-10-20168 viewsWoRMS taxaDigital photo, entire species Lankacythere reticulata Khosla & Nagori, 1989 †checked Silva, Dayverson Kaíque Freire da 2023-11-02 © 2023 Silva, Dayverson Kaíque Freire da Click here to return to the thumbnails overview |
