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- Ludwig-Maximilians-Universität München, GeoBio Center, Department Memberadd
Caturids are among the best-known predatory ray-finned fishes of the Mesozoic. Although there is consensus about their sister-group relationship to Amiidae (Holostei, Amiiformes), their diversity, ingroup phylogenetic relationships and... more
Caturids are among the best-known predatory ray-finned fishes of the Mesozoic. Although there is consensus about their sister-group relationship to Amiidae (Holostei, Amiiformes), their diversity, ingroup phylogenetic relationships and evolutionary history are still very poorly understood. Caturidae is currently restricted to Caturus and Amblysemius, each with two species. Among them, C. furcatus has become the wastebasket taxon for the group. Our revision of nearly 40 species based on the original descriptions, type and referred material led to significant results changing the picture of caturid diversity in the Late Jurassic. Four specific names are unavailable. Due to insufficient information in the original descriptions, lack of diagnostic features in the type material, or the complete lack of type material, 13 nominal species are nomina dubia. Two species currently considered junior synonyms represent distinct taxa. Strobilodus giganteus is removed from Caturidae. Caturus cliftoni, Thlattodus and Ditaxiiodus are tentatively referred to Strobilodus. The fossil record of Caturoidea is restricted to the Jurassic and earliest Cretaceous. The group apparently underwent significant diversification during the Late Jurassic, as indicated by the increase in the number of taxa and the dispersal of the group outside Europe, which had already begun in the Middle Jurassic.
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The genus Aspidorhynchus belongs to the family Aspidorhynchidae, a group of mesozoic actinopterygian fishes. Seven species of Aspidorhynchus are currently recognized worldwide. In the Solnhofen limestones of Southern Germany, only two... more
The genus Aspidorhynchus belongs to the family Aspidorhynchidae, a group of mesozoic actinopterygian fishes. Seven species of Aspidorhynchus are currently recognized worldwide. In the Solnhofen limestones of Southern Germany, only two species of Aspidorhynchus (A. acutirostris and A. sanzenbacheri) have been accepted as valid. During the study of A. acutirostris, the type species of the genus, we found significant morphological variation among the specimens referred to this species, particularly in the ornamentation of the flank scales. After thorough revision of several type and referred specimens, we have identified four different species of Aspidorhynchus in the Solnhofen Archipelago, corresponding to the already available nominal species A. acutirostris, A. ornatissimus, A. obtusirostris and A. sanzenbacheri. In addition to the strong differences in the ornamentation of the scales, these species differ in the shape of the premaxilla, the shape and dentition of the predentary, th...
In Argentina, the Nototheniidae is represented by about 20 species, which mostly live in coastal waters of the continental shelf and slope. A few species inhabit inshore waters along the coasts of Patagonia and the Fueguian and Falkland... more
In Argentina, the Nototheniidae is represented by about 20 species, which mostly live in coastal waters of the continental shelf and slope. A few species inhabit inshore waters along the coasts of Patagonia and the Fueguian and Falkland (Malvinas) archipelagos and even reach rocky intertidal zones (Norman 1937, Hart 1946). Patagonotothen sima (Richardson 1844) is distributed in the Atlantic from the San Matías Gulf (around 42°S) to the Beagle Channel (54°50'S), inhabiting shallow waters including the intertidal zones. During faunal surveys in the rocky intertidal zone in Puerto Deseado, Santa Cruz (by A. Gosztonyi), it was noted that males of P. sima, one of the most common fish species in that habitat, appeared to have a higher second dorsal fin than the females.
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Resumen: En 1973 y 1974. Andreína Bocchino describió tres nuevos géneros y especies de peces holósteos semionótidos para Formación Lagarcito, Sierra de las Quijadas, San Luis. Recientemente, como resultado de nuevos trabajos de campo... more
Resumen: En 1973 y 1974. Andreína Bocchino describió tres nuevos géneros y especies de peces holósteos semionótidos para Formación Lagarcito, Sierra de las Quijadas, San Luis. Recientemente, como resultado de nuevos trabajos de campo realizados en dicha ...
La presente tesis contiene el estudio taxonomico de las especies argentinas de Percichthys (Perciformes, Percichthyidae). Partiendo dela hipotesis sistematica mas reciente para el grupo, en la que se aceptaba la existencia de cuatro... more
La presente tesis contiene el estudio taxonomico de las especies argentinas de Percichthys (Perciformes, Percichthyidae). Partiendo dela hipotesis sistematica mas reciente para el grupo, en la que se aceptaba la existencia de cuatro especies nombradas y una Percichthys sp., se realizo en primer lugar un analisis morfometrico muitivariado. Como resultado [...]
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During the Jurassic the teleost fishes went through their first important radiation and colonization of continental environments. Due to a bias in the geological record, Jurassic fresh-water deposits are very scarce, and only three... more
During the Jurassic the teleost fishes went through their first important radiation and colonization of continental environments. Due to a bias in the geological record, Jurassic fresh-water deposits are very scarce, and only three continental fish faunas of Late ...
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Research Interests: Geology, Paleontology, Crocodylians, Vertebrate Palaeontology, Vertebrate Paleontology, and 14 moreDinosaur Paleontology, Theropods, Jurassic, Archosauria, Crocodyliformes, Dinosaurs, Sauropods, Gondwana, Vertebrate Palaeontology of the Jurassic, Fauna, Crocodilians, PTEROSAURIA, Pterosaurs, and Southern Hemisphere
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Tooth replacement in vertebrates is extremely diverse, and its study in extinct taxa gives insights into the evolution of the different dental renewal modes. Based on µ-CT scans of a left lower jaw of the extinct fish †Scheenstia... more
Tooth replacement in vertebrates is extremely diverse, and its study in extinct taxa gives insights into the evolution of the different dental renewal modes. Based on µ-CT scans of a left lower jaw of the extinct fish †Scheenstia (Actinopterygii – Lepisosteiformes), we describe in detail a peculiar tooth replacement mode that is, as far as we could trace back in the literature, unique among vertebrates. The formation of the replacement teeth comprises a 180° rotation of their acrodin cap that occurs intraosseously within bony crypts, and their setting up appears to be synchronous. We propose a model for the dental renewal process, and identify complementary anatomical features visible in the tomography such as the junction between the different tooth-bearing bones (prearticular-coronoid and dentary), as well as cavities corresponding to intraosseous crypts, nervous and/or vascular canals. The location of the cavities and their subsequent identification (e.g. Meckel's cavity, man...
24 most parsimonious trees. Equal weighted analysis
Research Interests: Systematics and Phylogeny
FIGURE 2. Sangiorgioichthys sui n. sp. A, Holotype (GMPKU-P-1568), SL = 81 mm. B, Reconstruction of the species based on GMPKU-P-1995 Scale bars = 10 mm.
FIGURE 7. Tlayuamichin itztli gen. et sp. nov. Line drawing of the skull in IGM 6716 (holotype). Scale bar equals = 50 mm.
Fil: Gallego, Oscar Florencio. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Nordeste. Centro de Ecologia Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecologia... more
Fil: Gallego, Oscar Florencio. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Nordeste. Centro de Ecologia Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecologia Aplicada del Litoral; Argentina
Research Interests: Geography and Humanities
... We provisionally accept an Early Jurassic age because that is in agreement with the age indicated by the dinosaur fauna (Rauhut ... are now recognized in this sequence, the Callovian Cañadón Asfalto and the (?)Tithonian Cañadón... more
... We provisionally accept an Early Jurassic age because that is in agreement with the age indicated by the dinosaur fauna (Rauhut ... are now recognized in this sequence, the Callovian Cañadón Asfalto and the (?)Tithonian Cañadón Calcáreo formations (Proserpio 1987, Rauhut ...
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Late Jurassic marine vertebrates are extraordinarily well preserved in several Plattenkalk Lagerstätten in central Europe. Among them, the Solnhofen Archipelago has yielded the very rare fish Coccolepis bucklandi, which was the first... more
Late Jurassic marine vertebrates are extraordinarily well preserved in several Plattenkalk Lagerstätten in central Europe. Among them, the Solnhofen Archipelago has yielded the very rare fish Coccolepis bucklandi, which was the first fossil chondrostean to be found in sediments younger than the Triassic. The type specimen of this species was lost, but it was rediscovered recently, prompting the alpha taxonomic revision of this iconic fish. A new species Coccolepis solnhofensis has been identified among the specimens referred to C. bucklandi. The two species differ in the distinctive distribution of scutes and fringing fulcra. Based on the available evidence, C. bucklandi is restricted to the Eichstätt Basin and the Lithacoceras eigeltingense ß Horizon of the Lithacoceras riedense Subzone (Hybonoticeras hybonotum Zone), and C. solnhofensis sp. nov. is limited to the Solnhofen Basin and the slightly younger Subplanites rueppellianus Subzone (Hybonoticeras hybonotum Zone). Therefore, t...
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List of studied specimens and consulted literature. (DOCX 19 kb)
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The locality of Brunn, Oberpfalz, represents the oldest setting within the area usually included within the Solnhofen Archipelago, dating to the Subeumela Subzone of the Late Kimmeridgian. The locality has yielded a rich vertebrate fauna... more
The locality of Brunn, Oberpfalz, represents the oldest setting within the area usually included within the Solnhofen Archipelago, dating to the Subeumela Subzone of the Late Kimmeridgian. The locality has yielded a rich vertebrate fauna from eight different levels of plattenkalks, dominated by actinopterygian osteichthyans. Apart from rare chondrichthyans, the fish fauna includes macrosemiid gynglimodians, caturid and ophiopsid halecomorphs, as well as a new specimen of the enigmatic halecomorph Ainia, and a diverse array of teleosts. Tetrapods are represented by reptiles, including rare marine turtles, at least two new taxa of rhynchocephalians, an atoposaurid and a teleosaurid crocodyliform, and rhamphorhynchid and pterodactyloid pterosaurs. Whereas the fish fauna shows close affinities with other Kimmeridgian faunas, not only from the Solnhofen Archipelago, but also from other European sites, such as Cerin, a high degree of endemism is striking within the reptile fauna.
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We report on a new species of the neopterygian genus Sangiorgioichthys Tintori and Lombardo, 2007, from middle Anisian (Pelsonian) deposits in South China (Luoping County, Yunnan Province). Sangiorgioichthys was previously known from a... more
We report on a new species of the neopterygian genus Sangiorgioichthys Tintori and Lombardo, 2007, from middle Anisian (Pelsonian) deposits in South China (Luoping County, Yunnan Province). Sangiorgioichthys was previously known from a single species, S. aldae, from the late Ladinian of the Monte San Giorgio (Italy and Switzerland). The recognition of the new species helped to improve the diagnosis of the genus, which is mainly characterized by the presence of broad posttemporal and supracleithral bones, one or two suborbital bones occupying a triangular area ventral to the infraorbital bones and lateral to the quadrate, and elongate supramaxilla fitting in a an excavation of the dorsal border of the maxilla. Sangiorgioichthys sui n. sp. differs from the type species in having two pairs of extrascapular bones, the medial pair usually fused to the parietals, maxilla with a complete row of small conical teeth, long supramaxilla, more than half of the length of the maxilla, only two la...
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The lagerstätten in the Monte San Giorgio have provided excellent fossils representing one of the most important windows to the marine life during the Triassic. Among these fossils, fishes are abundant and extraordinarily well preserved.... more
The lagerstätten in the Monte San Giorgio have provided excellent fossils representing one of the most important windows to the marine life during the Triassic. Among these fossils, fishes are abundant and extraordinarily well preserved. Most of these fishes represent extinct lineages and were difficult to understand and classify during the early years after discovery. These difficulties usually led to a mixture of species under the same taxonomic name. This is the case of fishes referred to the genus Archaeosemionotus. The name bearing type of A. connectens, the type species of this genus, represents a basal halecomorph, but most other fishes referred to this genus represent basal ginglymodians. Therefore, we conducted this study to clarify the taxonomic status and phylogenetic relationships of A. connectens, which is a member of the family Furidae (Halecomorphi, Ionoscopiformes) representing the second cladistically supported evidence of ionoscopiforms in the Triassic and it is th...
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The new neopterygian genusTicinolepis, including two new speciesT. longaevaandT. crassidensis described from Middle Triassic carbonate platform deposits of the Monte San Giorgio. The anatomy of this fish shows a mosaic of halecomorph and... more
The new neopterygian genusTicinolepis, including two new speciesT. longaevaandT. crassidensis described from Middle Triassic carbonate platform deposits of the Monte San Giorgio. The anatomy of this fish shows a mosaic of halecomorph and ginglymodian characters and, thus, the new taxon probably represents a basal holostean. During the latest Anisian to earliest Ladinian the two new species coexisted in the intraplatform basin represented by the uppermost Besano Formation, but onlyT. longaevasp. nov. inhabited the more restricted basin represented by the Ladinian Meride Limestone (except for the Kalkschieferzone). The more widely distributed type species shows interesting patterns of intraspecific variation including ontogenetic changes and morphological variation over time. The second species presents anatomical features that strongly indicate a strictly durophagous diet. The different distribution of the species is interpreted as a result of habitat partitioning and different adapt...