. Bulletin of the British Museum (Natural History), Geology. 0-125mm. Fig. 8a, b. Trichordis triangula sp. nov. a. Muscle scars, female left valve, paratype b. Anterior marginal pore canals, male right valve, paratype Description. Carapace dimorphic although the presumed males are only slightly more elongate than the females. Left valve larger than the right. Orna- mentation rather insignificant, consisting of weak pits superimposed upon the struc- tural ribs. Hinge entomodont, rather strongly developed. Duplicative broad anteriorly and, apart from a narrow anterior zone into
. Bulletin of the British Museum (Natural History), Geology. 0-125mm. Fig. 8a, b. Trichordis triangula sp. nov. a. Muscle scars, female left valve, paratype b. Anterior marginal pore canals, male right valve, paratype Description. Carapace dimorphic although the presumed males are only slightly more elongate than the females. Left valve larger than the right. Orna- mentation rather insignificant, consisting of weak pits superimposed upon the struc- tural ribs. Hinge entomodont, rather strongly developed. Duplicative broad anteriorly and, apart from a narrow anterior zone into which run the 12-14 straight marginal pore canals (Text-fig. 8b), the inner margin coincides with the line of concrescence. Selvage prominent, anterior flange distinct. Muscle scars. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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