| Tryblidiidae | |
|---|---|
 | |
| Drawing of the shell of Pilina unguis . Head region is on the left. | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Monoplacophora |
| Order: | Tryblidiida |
| Superfamily: | Tryblidioidea |
| Family: | † Tryblidiidae von Zittel, 1899 [1] |
Tryblidiidae is an extinct family of paleozoic monoplacophorans in the superfamily Tryblidioidea.
 | This section needs expansion. You can help by adding to it. (December 2009) |
Genera in the family Tryblidiidae include:
Monoplacophora, meaning "bearing one plate", is a polyphyletic superclass of molluscs with a cap-like shell inhabiting deep sea environments. Extant representatives were not recognized as such until 1952; previously they were known only from the fossil record, and were thought to have become extinct 375 million years ago.
Lysorophia is an order of fossorial Carboniferous and Permian tetrapods within the Recumbirostra. Lysorophians resembled small snakes, as their bodies are extremely elongate. There is a single family, the Molgophidae. Currently there are around five genera included within Lysorophia, although many may not be valid.
Aistopoda is an order of highly specialised snake-like stegocephalians known from the Carboniferous and Early Permian of Europe and North America, ranging from tiny forms only 5 centimetres (2 in), to nearly 1 metre (3.3 ft) in length. They first appear in the fossil record in the Mississippian period and continue through to the Early Permian.
Hypsilophodontidae is a traditionally used family of ornithopod dinosaurs, generally considered invalid today. It historically included many small bodied bipedal neornithischian taxa from around the world, and spanning from the Middle Jurassic until the Late Cretaceous. This inclusive status was supported by some phylogenetic analyses from the 1990s and mid 2000s, although there have also been many finding that the family is an unnatural grouping which should only include the type genus, Hypsilophodon, with the other genera being within clades like Thescelosauridae and Elasmaria. A 2014 analysis by Norman recovered a grouping of Hypsilophodon, Rhabdodontidae and Tenontosaurus, which he referred to as Hypsilophodontia. All other analyses from around the same time have instead found these latter taxa to be within Iguanodontia.
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Dyoplax is an extinct genus of pseudosuchian archosaur, possibly an erpetosuchid. Fossils have been found from the type locality within the upper Schilfsandstein Formation in Stuttgart, Germany. The holotype specimen was a natural cast of a nearly complete skeleton that lacked only parts of the tail and limb bones.
Bucaniidae is an extinct family of Paleozoic molluscs of uncertain position possibly being either gastropods or monoplacophorans in the superfamily Bellerophontoidea. The family lived from the Lower Ordovician to the Devonian and have shells in which the apertural margins tend to flare. Most genera have a slit and selenizone, others some modification of this feature.
Sinuitidae is an extinct family of Paleozoic molluscs of uncertain position. They had isostrophically coiled shells.
Trochonematidae is an extinct taxonomic family of fossil sea snails, marine gastropod molluscs in the superfamily Trochonematoidea.
Euspira is a genus of medium-sized sea snails, marine gastropod molluscs in the subfamily Polinicinae of the family Naticidae, the moon snails.
Drobna deformis is an extinct species of prawn, the only species in the genus Drobna.
Dusa is an extinct genus of prawns, in the order Decapoda, containing five species.
Tivela is a genus of saltwater clams, marine bivalve molluscs in the subfamily Meretricinae of the family Veneridae, the Venus clams.
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Stoycho Vassilev Breskovski was a Bulgarian paleontologist.
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Coeloptychium is an extinct genus of lychniscosidan hexasterophoran sea sponge which has often been used as an index fossil. Its remains have been found in Cretaceous sediments in Germany, Belgium, France and the UK. Coeloptyhcium is best preserved in Campanian sediments in Germany. The type species, C. agaricoides, was named in 1826.
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