Fig 4 - uploaded by Petr Skupien
Content may be subject to copyright.
Leidybatis jugosus ( L eidy , 1877); Eocene; Staré Město. Specimen No. 99606a. A –Dorsal view of the remains of the medial dental plates; there are two lateral teeth exposed on the lateral sides of the medial dental plate. B – Interpretative drawing. C – Tangential antero-posterior view of the specimen with the median elevation visible.
Source publication
The Eocene deposits from the Staré Město locality (Frýdlant Formation, Subsilesian unit) provided fossil fish remains, which can be assigned to two elasmobranch taxa: the eagle ray Leidybatis jugosus and the shark Centrophorus sp. The specimens are represented by associated dental plates and isolated teeth. This is the first record of L. jugosus in...
Contexts in source publication
Context 1
... occlusal surface of all of the teeth is cov- ered by a grey layer of enamel with highly specific gran- ulose-like structure. The medial teeth are well-preserved in the specimens 99605 and 99606. The specimen 99606a (Fig. 4) comprises four articulated median teeth. The breadth of each tooth is from 65 to 70 mm, the length is 10 to 12 mm, and the height is ca. 8 mm. The middle portion of the medial teeth is strongly elevated (transversely convex prominence, Fig. 4C). At the lateral edge of them are delim- ited triangular areas for lateral teeth. Specimen ...
Context 2
... structure. The medial teeth are well-preserved in the specimens 99605 and 99606. The specimen 99606a (Fig. 4) comprises four articulated median teeth. The breadth of each tooth is from 65 to 70 mm, the length is 10 to 12 mm, and the height is ca. 8 mm. The middle portion of the medial teeth is strongly elevated (transversely convex prominence, Fig. 4C). At the lateral edge of them are delim- ited triangular areas for lateral teeth. Specimen 99605 has four slightly disarticulated medial teeth. Their width is unknown (their extremities are bro- ken off), the length is ca. 10 mm, and height is ca. 8 ...
Similar publications
The Mesozoic mammal fossil record in Mexico is poor, but it spans from the Jurassic to the Cretaceous, and is diverse in its forms. For many years, the only Mesozoic mammalian record was that from the Campanian El Gallo Formation, in Baja California. The described mammals included Mesodma sp. cf. M. formosa, ?Stygimys sp., Pediomys sp. and Galloles...
Nonmammalian cynodonts represent a speciose and ecologically diverse group with a fossil record stretching from the late Permian until the Cretaceous. Because of their role as major components of Triassic terrestrial ecosystems and as the direct ancestors of mammals, cynodonts are an important group for understanding Mesozoic tetrapod diversity. We...
This study investigates faunal remains from the site of Gesher Benot Ya'aqov, analyzing how hominins may have utilized vertebrates and exploring paleoenvironments during the Early and Middle Pleistocene. Based on analyses of a range of vertebrates, results show that the species distribution of terrestrial vertebrates (microvertebrates and mammals)...
Manor Farm Quarry shows a detailed record of the entire Rhaetian section typical of southwest England. It has yielded a standard Rhaetian marine fauna, including eight species of sharks, four species of actinopterygian fishes, and the reptiles Pachystropheus and Ichthyosaurus, all of which are widely known from coeval sites. An unusual feature is t...
The Late Miocene continental successions of the Baccinello-Cinigiano basin (Grosseto), one of the longest and most continuous vertebrate-bearing continental successions in the Neogene Italian record, yielded at least four superimposed vertebrate assemblages bracketed in the time span 8.3-6.4 Ma. The Baccinello-Cinigiano basin is famous for recordin...
Citations
Early Eocene batomorph faunas, represented by isolated teeth from the London Clay Formation, LCF (Division D, lower Sheppey Member, lower NP12) at Burnham-on-Crouch, Essex, UK, and the Tielt Formation (Egemkapel Clay Member) and overlying Hyon Formation (Egem Sand Member, middle to upper NP12) at Egemkapel, western Flanders, Belgium, are described and illustrated. Whereas the Burnham fauna is from an outer neritic, deep-water environment, the faunal assemblages recovered from different stratigraphic levels in the Egemkapel Clay and Egem Sand Members are characteristic of mid to inner neritic settings. We also examined a small batomorph fauna from the upper levels of the Roubaix Clay Member of the Kortrijk Clay Formation exposed in the Koekelberg Clay Pit at Marke, Belgium. The upper Roubaix Clay Member is considered penecontemporaneus with Division D of the LCF, but was deposited in a mid-neritic environment. In all, we identified 13 batomorph taxa in the Sheppey Member, 11 in the Roubaix Clay Member, 24 in two different beds of the Egemkapel Clay Member, and 22 in five beds of the Egem Sand Member. Seven new genera are proposed: Glaucopristis gen. nov., Essexraja gen. nov., Casierabatis gen. nov., Sheppeytrygon gen. nov., Serratodasyatis gen. nov., Belgabatis gen. nov., and Eurasiabatis gen. nov. Three new species are described: Essexraja ypresiensis gen. et sp. nov., Casierabatis lambrechtsi gen. et sp. nov., and Eurasiabatis occlusostriata gen. et sp. nov. Based on detailed comparisons with the dentition and dental morphology of living stingrays, four species previously included in the genus “Dasyatis” are re-allocated to new dasyatoid genera: Casierabatis jaekeli (Leriche, 1905) comb. nov., Sheppeytrygon davisi (Casier, 1966) comb. nov., Serratodasyatis tricuspidata (Casier, 1946) comb. nov., and Belgabatis thierryi (Smith, 1999) comb. nov. The rhinopristiform “Rhinobatus” bruxelliensis Jaekel 1894 is transferred to the new genus Glaucopristis. A stratigraphic range chart for batomorph taxa in the late Paleocene, Ypresian, and Lutetian of the North Sea Basin is presented. This chart may be considered as a starting point for additions and updates in future works, because identifications of some small-toothed rhinopristiform and dasyatoid species reported in the literature appear doubtful and the stratigraphic coverage of
several species, especially those from outer neritic habitats, is insufficiently known.
The newly collected shark and ray tooth fossils from the marine sediments of the Upper Marine Molasse close to Allerding (4.8 km SE of Schärding, Austria) allow for a review of the hitherto known diversity comprising a taxonomic update and the documentation of additional taxa. Besides ten taxa already known from the area, the following taxa were collected for the first time from the site: Galeocerdo aduncus Agassiz, 1835, Rhizoprionodon sp., Hemipristis serra Agassiz, 1835, Apristurus sp., Pseudoapristurus nonstriatus Pollerspöck & Straube, 2017, Scyliorhinus sp., Keasius sp., Mitsukurina lineata (Probst, 1879), Odontaspis molassica Probst, 1879, Otodus (Megaselachus) chubutensis (Ameghino, 1901), Chlamydoselachus bracheri Pfeil, 1983, Hexanchidae indet., Paraheptranchias repens (Probst, 1879), Notorynchus primigenius (Agassiz, 1843), Deania sp., Isistius triangulus (Probst, 1879), Euprotomicrus sp., Etmopterus sp., Pristiophorus sp., Nanocetorhinus tuberculatus Underwood & Schlögl, 2013, Raja gentili Joleaud, 1912, Rajidae sp. indet., Rhinobatos sp., Aetobatus arcuatus (Agassiz, 1843), and Dasyatis rugosa (Probst, 1877). Fossil teeth of Euprotomicrus represent the first fossil evidence of this taxon ever. Our results indicate a typical Miocene coastal shallow and continental shelf associated diversity. In addition, we reviewed the paleogeographic distribution ranges of the squaliform genera listed herein to test, if we can identify the origin of specific squaliform genera.
