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Paracarinachites
Taxonomy
Paracarinachites is a genus. It is not extant.
It was assigned to Problematica by Sepkoski (2002); and to Zhijinitidae by Parkhaev and Demidenko (2010).
It was assigned to Problematica by Sepkoski (2002); and to Zhijinitidae by Parkhaev and Demidenko (2010).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1984 | Yangtzechiton Yu p. 24 |
| 1984 | Luyanhaochiton Yu p. 25 |
| 2002 | Paracarinachites Sepkoski |
| 2010 | Paracarinachites Parkhaev and Demidenko p. 911 |
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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.
G. †Paracarinachites
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†Paracarinachites sinensis Luo et al. 1982
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Invalid names: Carinachites spinatus Qian 1977 [synonym], Paracarinachites columellatus Qian 1984 [synonym]
Invalid names: Luyanhaochiton Yu 1984 [synonym], Yangtzechiton Yu 1984 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. Y. Parkhaev and Y. Demidenko 2010 | "Elongated bilateral symmetrical sclerites curved downwards in crescent-like manner composed of several segments. Sclerite margins bent inwards. Borders of segments indistinct or obliterated. Outer surface of each segment bears spiny projection curved abapically. Spiny projections arranged in one subcentral row (P. sinensis and P. spinus), in two parallel rows (P. bispinosus), or in alternating manner in two rows (P. parabolicus). Internal concave surface of sclerite smooth. Usually apical part of sclerite narrowest and with strongest bent. Sclerite becomes wider towards rounded abapical side." |