Coelacanthus bears a superficial similarity to the living coelacanthLatimeria, though it was smaller, and had a more elongated head. Individuals grew up to 0.7 metres (2.3 ft) in length, had an elongate codavypter or supplementary tail lobe, and had small lobed fins, suggesting that Coelacanthus were open-water predators. The fin rays of the caudal fin are hollow, which gave Coelacanthus its name. The name is an adaptation of the Modern Latin cœlacanthus ("hollow spine"), from the Greek κοῖλ-ος (koilos; "hollow") and ἄκανθ-α (akantha; "spine"). These hollow spines are a typical feature of coelacanths.
Restoration of C. granulatus
Distribution and timeedit
The type speciesCoelacanthus granulatus was described from the late Permian (Wuchiapingian) Kupferschiefer of Germany and equivalent Marl Slate of England. Coelacanthus is primarily known from Late Permian and Early Triassic deposits in Europe and Canada, although the referred species C. welleri, known from Iowa, is of Late Devonian (Famennian) age. It survived the Permian–Triassic extinction event, and one species, C. banffensis, is known from the Early Triassic.
Several other species that were first referred to Coelacanthus were later reallocated to other genera. Coelacanthus minor was considered by Woodward (1891) as potentially belonging to the Triassic genus Heptanema,[2] while Martin and Wenz (1984) considered Coelacanthus lunzensis a possible synonym of Garnbergia.[3]Coelacanthus madagascariensis from the Early Triassic of Madagascar was reattributed to the genus Rhabdoderma, and Coelacanthus evolutus is a synonym of Whiteia woodwardi.[4]
Referencesedit
^Agassiz, L. 1839. Recherches sur les poissons fossiles II. Petitpierre, Neuchâtel.
^Woodward A. S. 1891. Catalogue of the Fossil Fishes in the British Museum (Natural History). Part II. London.
^M. Martin and S. Wenz. 1984. Découverte d'un nouveau Coelacanthidé, Garnbergia ommata n.g., n.sp., dans le Muschelkalk supérieur du Baden-Württemberg. Stuttgarter Beiträge zur Naturkunde, Serie B (Geologie und Paläontologie) 105:1-17
^Forey P. L. (1998) History of the coelacanth fishes (Chapman & Hall, London).
coelacanthus, hollow, spine, genus, extinct, coelacanths, that, first, appeared, during, permian, period, first, genus, coelacanths, described, about, century, before, discovery, extant, coelacanth, latimeria, order, coelacanthiformes, named, after, temporal, . Coelacanthus hollow spine is a genus of extinct coelacanths that first appeared during the Permian period It was the first genus of coelacanths described about a century before the discovery of the extant coelacanth Latimeria 1 The order Coelacanthiformes is named after it CoelacanthusTemporal range 260 247 Ma PreꞒ Ꞓ O S D C P T J K Pg N Late Permian to Early Triassic Coelacanthus granulatus fossil Scientific classification Domain Eukaryota Kingdom Animalia Phylum Chordata Clade Sarcopterygii Class Actinistia Order Coelacanthiformes Family Coelacanthidae Genus CoelacanthusAgassiz 1839 Type species Coelacanthus granulatusAgassiz 1839 Other species C banffensis Lambe 1916 C dendrites Gardiner 1973 C gracilis Agassiz 1844 C ornatus Newberry 1856 C welleri Eastman 1908 Contents 1 Description 2 Distribution and time 3 References 4 External linksDescription editCoelacanthus bears a superficial similarity to the living coelacanth Latimeria though it was smaller and had a more elongated head Individuals grew up to 0 7 metres 2 3 ft in length had an elongate codavypter or supplementary tail lobe and had small lobed fins suggesting that Coelacanthus were open water predators The fin rays of the caudal fin are hollow which gave Coelacanthus its name The name is an adaptation of the Modern Latin cœlacanthus hollow spine from the Greek koῖl os koilos hollow and ἄkan8 a akantha spine These hollow spines are a typical feature of coelacanths nbsp Restoration of C granulatusDistribution and time editThe type species Coelacanthus granulatus was described from the late Permian Wuchiapingian Kupferschiefer of Germany and equivalent Marl Slate of England Coelacanthus is primarily known from Late Permian and Early Triassic deposits in Europe and Canada although the referred species C welleri known from Iowa is of Late Devonian Famennian age It survived the Permian Triassic extinction event and one species C banffensis is known from the Early Triassic Several other species that were first referred to Coelacanthus were later reallocated to other genera Coelacanthus minor was considered by Woodward 1891 as potentially belonging to the Triassic genus Heptanema 2 while Martin and Wenz 1984 considered Coelacanthus lunzensis a possible synonym of Garnbergia 3 Coelacanthus madagascariensis from the Early Triassic of Madagascar was reattributed to the genus Rhabdoderma and Coelacanthus evolutus is a synonym of Whiteia woodwardi 4 References edit Agassiz L 1839 Recherches sur les poissons fossiles II Petitpierre Neuchatel Woodward A S 1891 Catalogue of the Fossil Fishes in the British Museum Natural History Part II London M Martin and S Wenz 1984 Decouverte d un nouveau Coelacanthide Garnbergia ommata n g n sp dans le Muschelkalk superieur du Baden Wurttemberg Stuttgarter Beitrage zur Naturkunde Serie B Geologie und Palaontologie 105 1 17 Forey P L 1998 History of the coelacanth fishes Chapman amp Hall London External links editMikko s Phylogeny Archive on Coelacanthiformes nbsp Paleontology portal nbsp fish portal nbsp This article about a Triassic fish is a stub You can help Wikipedia by expanding it vte nbsp This article about a prehistoric lobe finned fish is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Coelacanthus amp oldid 1182140353, wikipedia, wiki, book, books, library,
