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Paleochiton siskiyouensis
Taxonomy
Paleochiton siskiyouensis was named by Hoare (2000). It is not extant. Its type specimen is CAS 68395, a valve. Its type locality is USGS M1027 - 2 kilometers southeast of Parker Ranch, east fork of Scott River, which is in a Ludfordian carbonate limestone in the Gazelle Formation of California.
Synonymy list
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Paleochiton siskiyouensis Hoare 2000
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Diagnosis
Reference | Diagnosis | |
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R. D. Hoare 2000 | Intermediate plates strongly arched; hallow to deep jugal sinus; apical area short, bordering nearly traight to lightly produced posterior margin.
Intermediate plates strongly arched, subrectangular in dorsal view; jugal area rounded; side slopes flatly convex; posterior margin straight to lightly mucronate; lateral margins straight to lightly convex, nearly parallel; anterior margin with deep jugal sinus;jugal angle 83°-89°' apical area short, 1.4 mm in length, traight to flatly V-shaped; shell material thick medially, thinning laterally; surface smooth. Tail plate wedge-shaped in dorsal view; posterior margin pointed, curved dorsally ' anterior margin flatly convex; jugal area broadly rounded side slopes flat. |
Measurements
No measurements are available
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Source: c = class | |||||
Reference: Kiessling 2003 |
Age range: Ludfordian or 425.60000 to 423.00000 Ma
Collections: one only
Time interval | Ma | Country or state | Original ID and collection number |
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Ludfordian | USA (California) | Paleochiton siskiyouensis (type locality: 157204) |