On the Taxonomy, Morphology, and Ecology of the Beach Clam, Donax Striatus Linné
Donax striatus Linné, 1767, is synonymous with D. flexuosus Gould, 1853; D. lamarckii Deshayes in Reeve, 1854; and D. mediamericana Pilsbry, 1919. Synonymy of the species is largely due to the wide diversity in shell characters and the absence of clear diagnostic features on which to define the species. It is suggested that variation in the size, color, shape, and sculpture of shells may be due to ecological factors such as nature of the beach, availability of food, and density of populations. D. striatus is sympatric with D. denticulatus Linné throughout its range, but occurs more sporadically and usually in lesser numbers. Ecological, zoogeographical, and morphological evidence is put forward to show that D. striatus is the more recent and less established of the two species, and it is suggested that this may be the reason for its greater overall diversity.
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Document Type: Research Article
Publication date: 1967-09-01
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