科研之友
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摘要
Bulk sampling of late Oxfordian and early Kimmeridgian sediments of the Sot de Chera Formation near the Village of Moneva in the Aragonese Branch of the Iberian Ranges (NE Spain) yielded a low-diversity fauna of sharks (Synechodus ungeri, Phorcynis sp. cf. P. catulina, ?Scyliorhinidae indet., Pseudorhina sp., Protospinax sp.), guitarfishes (Belemnobatis sp., Spathobatis sp.) and ray-finned fishes (Gyrodus hexagonus, Ionoscopus sp., Caturus sp.). The most common selachian is Synechodus ungeri, which is the first record of this species outside of Germany, enlarging both its palaeogeographic and stratigraphic distributions. A detailed description and taxonomic discussion of this species are presented. Most other sharks and guitarfishes probably represent new taxa. Taxonomic and systematic information about all taxa recovered from Moneva is provided. The faunal composition consisting predominantly of stenohaline sharks and epipelagic ray-finned fishes and lacking hybodonts is characteristic for an open-marine, neritic environment and represents the first unquestionable fish assemblage from an offshore setting on a distal carbonate platform of the northern tropical Tethys shelf. The faunal composition is compared with contemporaneous fish associations from neritic settings in the Boreal realm.
- 出版日期2013-6
