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Tabulata, commonly known as tabulate corals, are an order of extinct forms of coral. They are almost always colonial, forming colonies of individual hexagonal cells known as corallites defined by a skeleton of calcite, similar in appearance to a honeycomb. Adjacent cells are joined by small pores. Their distinguishing feature is their well-developed horizontal internal partitions (tabulae) within each cell, but reduced or absent vertical internal partitions. They are usually smaller than rugose corals, but vary considerably in shape, from flat to conical to spherical.
Macrodontophion is the name given to a dubious genus of lophotrochozoan from the Early Devonian Dniester Series of Podolia, Ukraine. It was described by Adalbert Zborzewsky in 1834, but was never given a species epithet, and is considered a nomen dubium, because it is based only on fragments, such as the holotype, a shell of 25 millimetres (0.98 in).
Homalonotus is an extinct genus of trilobites in the order Phacopida. It contains several species, including H. armatus and H. roemeri. It is closely related to other trilobites such as Arduennella and Dipleura..
Semipodolaspis is an extinct genus of jawless fish.
Palanasaspis chekhivensis is an extinct species of pteraspidid heterostracan agnathan which existed during the Pragian epoch of the early Devonian period in what is now Podolia, Ukraine. It is known primarily from a wide rostral plate, which is referenced in the generic name, a compound word combining the Latin words pala, "shovel," and nasus, "nose," with the Greek suffix aspis, "a small shield." Although the rostral plate clearly marks the creature as a pteraspidoid heterostracan, that literally nothing else of its anatomy is known forces researchers to leave it as incertae sedis.
Djurinaspis is an extinct genus of jawless fish which existed during the early Devonian period. It was originally described by Novitskaya in 1983. A new species, D. secunda, from Ukraine was described by Victor Voichyshyn in 2011.
Podolaspis is an extinct genus of pteraspidid heterostracan agnathan which existed during the early Devonian period. It was originally described by Zych in 1931, and contains the species P. lerichei, and P. danieli.
Gracianella is a genus of fossil brachiopods. It was described by Johnson and Coucot in 1967, and existed from the Silurian to the Devonian of Australia, Austria, Canada, China, the Czech Republic, Italy, Tajikistan, and the United States. A new species, G. paulula, was described by Andrzej Baliński in 2012, from the early Devonian of Ukraine.
Plectodonta is an extinct genus of brachiopods which existed during the Devonian to Silurian of the United States, Australia, Canada, China, the Czech Republic, Czechoslovakia, Germany, Kazakhstan, Morocco, Poland, Spain, Ukraine, Argentina, Bolivia, Sweden, the United Kingdom, and Venezuela. It was described by Kozlowski in 1929, and the type species is P. mariae. A new extinct subspecies, P. mariae pantherae, was described by Andrzej Baliński in 2012, from the early Devonian of Ukraine.
Skenidioides is an extinct genus of brachiopods which existed during the Ordovician, Silurian, and Devonian of what is now Australia, Canada, China, the Czech Republic, Italy, Morocco, Poland, Ukraine, the United States, Belarus, Estonia, Lithuania, Mexico, Norway, Sweden, the United Kingdom, Venezuela, Ireland, Kazakhstan, the Russian Federation, and Argentina. It was described by Schuchert and Cooper in 1931, and the type species is S. billingsi. A new species, S. tatyanae, was described by Andrzej Baliński in 2012, from the early Devonian of Ukraine. The species epithet refers to Tatyana Lvovna Modzalevskaya.
This list of fossil fish species is a list of taxa of fish that have been described during the year 2012. The list only includes taxa at the level of genus or species.
Palaeacanthaspis vasta is an extinct acanthothoracid placoderm from the early Devonian of Europe.
Zenaspidida is an extinct order of osteostracans, a group of jawless stem-gnathostomes. They possessed a distinct headshield, which varied in width to length ratio by species.
Proconodontus is an extinct genus of conodonts in the monotypic family Proconodontidae. The specimens are found in Cambrian formations.
Aneurophyton is a genus of extinct vascular plants that belong to the Aneurophytales, a class of progymnosperms. The most well-known species within the genus are A. germanicum and A. doui, while a third probable species, A. olnense, has also been described. Aneurophyton is primarily known from multiple occurrence records of A. germanicum and A. doui which occur in Middle Devonian and Upper Devonian outcrops in Belgium, China, Germany, and the United States.
Zychaspis is an extinct genus of Devonian jawless fishes. Two species of this genus, Z. bucovinensis and Z. elegans are known from the Devonian-aged rocks of Ukraine. The genus name, Zychaspis, was named as a tribute to palaeontologist Władysław Zych.
Wladysagitta is an extinct genus of osteostracan jawless fish that existed during the lower Devonian period of what is now Podolia, Ukraine. This taxon was named in honor of Polish paleontologist Dr. Władysław Zych (1899–1981), and from the Latin sagitta, meaning arrow, which is in reference to the arrow-like shape of its skull.
Panderodus Is an extinct genus of jawless fish belonging to the order Conodonta. This genus had a long temporal range, surviving from the middle Ordovician to late Devonian. In 2021, extremely rare body fossils of Panderodus from the Waukesha Biota were described, and it revealed that Panderodus had a more thick body compared to the more slender bodies of more advanced conodonts. It also revealed that this conodont was a macrophagous predator, meaning it went after large prey.
References
- ↑ Victor Voichyshyn & Hubert Szaniawski (2012). "Acanthodian jaw bones from Lower Devonian marine deposits of Podolia, Ukraine". Acta Palaeontologica Polonica . 57 (4): 879–896. doi: 10.4202/app.2011.0079 .
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