Nessariostoma
| Nessariostoma Temporal range: Emsian
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| Artist's reconstruction | |
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Class: | |
| Order: | Denison 1975
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| Family: | Paraplesiobatidae Berg 1940
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| Genus: | Nessariostoma
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| Species: | N. granulosum
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| Binomial name | |
| Nessariostoma granulosum Broili, 1933
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Nessariostoma granulosum is a lightly armored pseudopetalichthyid placoderm from the Hunsrückschiefer Lagerstätte of Early Devonian Germany. The type and only known specimen is an articulated, but very incomplete individual, deformed and elongated, consisting of a large, incomplete, tubercle-covered head, a long, beak-like rostrum, and some of the trunk, with a total length of 18 centimeters.[1] N. granulosum was once placed in Stensioellida, though most other experts regard it at as a pseudopetalichthyid: Denison 1978 regards it as a placoderm incertae sedis because the specimen is deformed and so poorly preserved so as to stymie proper attempts at classification.[1]
References
[edit]- ^ a b Denison, Robert (1978). Placodermi Volume 2 of Handbook of Paleoichthyology'. Stuttgart New York: Gustav Fischer Verlag. pp. 119–120. ISBN 978-0-89574-027-4.
External links
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