Marginix
| Marginix Temporal range:
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|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Ophiuroidea |
| Family: | †Encrinasteridae |
| Subfamily: | †Encrinasterinae |
| Genus: | †Marginix Martínez & del Río, 2015 |
| Type species | |
| †Encrinaster yachalensis
(= †Marginix yachalensis) Ruedemann, 1916
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| Synonyms | |
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Marginix is an extinct genus of brittle star in the family Encrinasteridae.
Discovery and naming
In 1916, a study by Rudolf Ruedemann describing some fossil material sent from Cerro Blanco, Jachal, Argentina to John Mason Clarke at the New York State Museum was published. The fossils, then thought to represent starfish remains, were recognized by Ruedemann to represent two new species, one of which he thought was a member of the genus Encrinaster and named Encrinaster yachalensis, the specific name referring to Jachal. Ruedemann studied a single specimen of this species, exhibiting the abactinal side of the animal, cataloged as NYSM 7762 and designated as the holotype of the species.[1] Later in 1995, Reimund Haude discovered that this species, now known to be a brittle star, differs significantly from other species of Encrinaster, and thus transferred it to a new genus which he named Marginaster. The species was thus renamed as Marginaster yachalensis, and became the type species of its genus.[2]
References
- ^ Ruedemann, Rudolf (1916). "Two new starfishes from the Silurian of Argentina". New York State Museum Bulletin. 189: 116–120.
- ^ Haude, Reimund (1995-07-14). "Lower Devonian echinoderms from the Precordillera (Argentina)". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 197 (1): 37–86. doi:10.1127/njgpa/197/1995/37. ISSN 0077-7749.
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