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Striochonetes
Taxonomy
Striochonetes was named by Waterhouse and Piyasin (1970) [Sepkoski's age data: P Leon-m P Guad-l Sepkoski's reference number: 418]. It is the type genus of Striochonetinae.
It was assigned to Striochonetinae by Williams et al. (2000); and to Strophomenida by Sepkoski (2002).
It was assigned to Striochonetinae by Williams et al. (2000); and to Strophomenida by Sepkoski (2002).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1970 | Striochonetes Waterhouse and Piyasin p. 106 |
| 1970 | Ratburia Yanagida p. 85 |
| 2000 | Striochonetes Williams et al. p. 415 |
| 2002 | Ratburia Sepkoski |
| 2002 | Striochonetes Sepkoski |
| 2004 | Binderochonetes Afanasjeva pp. 162-164 figs. 1-5 |
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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. †Striochonetes Waterhouse and Piyasin 1970
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†Striochonetes elongatus Afanasyeva 1988
†Striochonetes maoershanensis Yang 1984
†Striochonetes scutella Waterhouse and Piyasin 1970
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Invalid names: Ratburia komalarjuni Yanagida 1970 [synonym]
†Striochonetes subquadratus Abramov and Grigorieva 1988
Invalid names: Binderochonetes Afanasjeva 2004 [synonym], Ratburia Yanagida 1970 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. A. Afanasjeva 2004 (Binderochonetes) | Shell medium-sized and semielliptic in outline. Ventral valve moderately inflated and having longitundinal hump-shaped eminence. Dorsal valve moderately concave. Cardinal margin denticulated. Sinus and fold undeveloped. On each side of beak, bases of four or five cardinal spines inclined laterally at angle of 50 degrees to cardinal margin. External radial ornamentation composed of numerous very thin and smooth striae. Inside ventral valve, median septum reaching middle of valve length. Inside dorsal valve, cardinal process high, trilobate, and having alveolus at base. Median septum stretching to middle of valve length and somewhat farther. Brachial ridges absent. Relatively large and irregularly arranged endospines located on internal surface of both valves. |
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 32 | 2.63 | 1.30 | 4.80 | 2.80 | 1.08 |
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: base of the Artinskian to the top of the Capitanian or 290.10000 to 259.51000 Ma
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Artinskian | Russian Federation | S. subquadratus (100676) | |
| Roadian | Russian Federation | S. elongatus (88692) | |
| Roadian | Thailand | S. scutella (40868) | |
| Roadian | Thailand (Ratchaburi) | S. scutella (40936) | |
| Wordian | Thailand (Ratchaburi) | Ratburia komalarjuni (116879) S. scutella (40954) | |
| Wordian | China (Sichuan) | S. scutella (103464) | |
| Capitanian | Mongolia | Binderochonetes manankovi (51570) |