The morphology and sculpture of ossicles in the Cottidae (Teleostei) of the Baltic Sea

The morphology and sculpture of ossicles in the Cottidae (Teleostei) of the Baltic Sea

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Small to very small ossified structures (ossicles) such as cephalic horns, dermal tubercles, fin-ray rods, lateral-line canal segments, branchial tooth plates and gill-raker tubercles of three species of the teleostean fish family Cottidae inhabiting the Baltic Sea are described and for the first whole wheat phyllo dough time illustrated with SEM images, with emphasis on their microscopic external features.The morphology and sculpture of these small ossicles notably differ in the three genera, but differences can also occur between males 15-eg2373cl and females, as documented here in Myoxocephalus scorpius (Linnaeus).The detailed features of such ossicles are potentially useful for taxonomic identification in sea-floor sediments or gut contents, in a manner similar to their use in many modern and fossil fishes, and may also prove useful as phylogenetically important characters at generic and familial levels.