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A New Tristichopterid (Pisces, Sarcopterygii) from the Devonian of Latvia

2008; De Gruyter Open; Volume: 62; Issue: 1-2 Linguagem: Inglês

10.2478/v10046-008-0007-0

2592-8848

Ivars Zupiņš,

Evolution and Paleontology Studies

A New Tristichopterid (Pisces, Sarcopterygii) from the Devonian of Latvia A new species of tristichopterid sarcopterygians , Eusthenopteron kurshi, sp. nov., the earliest representative of the family reported to this date from the territory known as the Main Devonian Field, is described from the well-known fossil locality of Latvia, the Lode clay quarry (Upper Givetian/Lower Frasnian). One complete skeleton and several disarticulated bone elements of the head and shoulder girdle have been found. The material reveals some morphologic features like a relatively short parietal shield in the cranial roof and rather asymmetric caudal fin. Characteristic features for the species are a front end of the squamosal extending comparatively far anteriorly and opercular being twice as high as the subopercular.