Phylogenetic Relationships of Tanyemblemaria Alleni, a New Genus and Species of Chaenopsid (Pisces: Blennioidei) from the Gulf of Panama
Tanyemblemaria Alleni, described from a single specimen from Islas Perlas, Panama, is unique among chaenopsids in having the dorsal portion of the second infraorbital expanded, the posterior margin of the preopercle with serrations and short spines, five anal-fin pterygiophores inserted anterior to the first caudal vertebra, and XXVII dorsal-fin spines. It is also distinctive in lacking a nasal cirrus and in having an elongate body, an elongate first dorsal-fin spine, spines on the ventral margin of the first infraorbital, exposed ridges on the nasals, and a raised ridge on the frontals with pits anterior to the ridge. Tanyemblemaria shares two apparent apomorphies, widely separate nasals and reduced vomerine dentition, with Emblemaria, Hemiemblemaria, Lucayablennius and Chaenopsis. Autapomorphies are proposed for each of these genera and their interrelationships are hypothesized based on morphological character S. Chaenopsis and Lucayablennius are sister groups, Hemiemblemaria is their sister group, but the relationships of Tanyemblemaria are unresolved; it is either the sister group of these three genera or, more likely, the sister group of Emblemaria.
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Document Type: Research Article
Publication date: September 1, 1992
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