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Siphogonuchites
Taxonomy
Siphogonuchites was named by Qian (1977) [Sepkoski's age data: ]. It is not extant. Its type is Siphogonuchites triangularis. It is the type genus of Siphogonuchitidae.
It was assigned to Sachitida by Sepkoski (2002); to Halwaxida by Conway Morris and Caron (2007); and to Siphogonuchitidae by Parkhaev and Demidenko (2010), Kouchinsky et al. (2017).
It was assigned to Sachitida by Sepkoski (2002); to Halwaxida by Conway Morris and Caron (2007); and to Siphogonuchitidae by Parkhaev and Demidenko (2010), Kouchinsky et al. (2017).
Species
Sachitelus intercostatus, S. bisulcatus, S. equilateralis, S. intermedius, S. pusilliformis, S. subremualis, S. triangularis (syn. Palaeosulcachites shipaiensis, Palaeosulcachites biformis, Palaeosulcachites minus, Palaeosulcachites irregularis, Trapezochites minuta) (type species), Trapezochites chordoides
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1977 | Palaeosulcachites Qian |
| 1977 | Siphogonuchites Qian |
| 1980 | Sachitelus intercostatus Jiang |
| 1980 | Trapezochites chordoides Jiang figs. Pl. 3, figs. 3, 7, 16 |
| 1982 | Trapezochites Qian and Yiang |
| 2002 | Siphogonuchites Sepkoski |
| 2007 | Siphogonuchites Conway Morris and Caron p. 1258 |
| 2010 | Siphogonuchites Parkhaev and Demidenko p. 957 |
| 2017 | Siphogonuchites Kouchinsky et al. p. 373 |
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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. †Siphogonuchites Qian 1977
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†Siphogonuchites bisulcatus Qian and Yin 1984
†Siphogonuchites equilateralis Qian and Yin 1984
†Siphogonuchites intermedius Qian 1977
†Siphogonuchites pusilliformis Qian 1977
†Siphogonuchites subremualis Bokova 1985
†Siphogonuchites triangularis Qian 1977
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Invalid names: Palaeosulcachites biformis Qian 1977 [synonym], Palaeosulcachites irregularis Qian 1977 [synonym], Palaeosulcachites minus Qian 1984 [synonym], Palaeosulcachites shipaiensis Qian 1984 [synonym], Trapezochites minuta Jiang 1980 [synonym]
Invalid names: Palaeosulcachites Qian 1977 [synonym], Sachitelus intercostatus Jiang 1980 [nomen nudum], Trapezochites Qian and Yiang 1982 [synonym], Trapezochites chordoides Jiang 1980 [nomen nudum]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. Y. Parkhaev and Y. Demidenko 2010 | "Hollow asymmetrically bent or circinate sclerites with sharp lateral margins. Sclerites narrowing distally. Upper convex side of sclerite bears one or two longitudinal oblique ribs and transversal striation. Lower side well delineated by sharp margins, concave or flattened, it bears faint transversal striation. Cross-section triangular, trapezoid or polygonal in proximal part, changes its shape along sclerite length. Distal end blind, rounded or pointed." |
Measurements
No measurements are available
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| Source: g = genus, uc = unranked clade | |||||
| References: Hendy et al. 2009, Hendy 2009 | |||||
Age range: base of the Jinnigian to the top of the Early/Lower Cambrian or 538.80000 to 506.50000 Ma
Collections (90 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Jinnigian | China (Yunnan) | S. triangularis (201490 201528) | |
| Manykaian | Russian Federation (Siberia) | S. triangularis (50316) | |
| Nemakit-Daldynian | China (Shaanxi) | S. mirus, S. triangularis (86553 86554 86555 86558 86560 86569) S. triangularis (86556 86566 86567 86568 86570) | |
| Nemakit-Daldynian | Russian Federation (Khabarovsk Krai) | S. sp. (50367 50418) | |
| Nemakit-Daldynian | China (Sichuan) | S. triangularis (232842) | |
| Nemakit-Daldynian | Russian Federation (Siberia) | Palaeosulcachites sp. (50340) S. sp. (50317 50417) S. sp., Palaeosulcachites sp. (50427) | |
| Nemakit-Daldynian | Iran | Palaeosulcachites sp. (10526 10527 10528 10529) | |
| Nemakit-Daldynian - Tommotian | Russian Federation (Sakha) | S. sp. (99229) | |
| Early/Lower Cambrian | China (Shaanxi) | S. mirus, S. triangularis (86593) S. triangularis (86581 86582 86583 86587 86588 86589 86590 86591) | |
| Meishucunian | China (Sichuan) | S. sp., Palaeosulcachites sp., Trapezochites sp. (107389) | |
| Meishucunian | China (Yunnan) | S. sp. (108257 108260) S. sp., Palaeosulcachites sp. (108259) S. triangularis (108258 201511 201512 201513 201514 201515 201516 201517 201518 201519 201520 201521 201523 201529 201530 201531 201541 201542 201545 201546 201547 201548 201552 201567 201568 201569 201570 201571 201572 201574) | |
| Meishucunian | China (Guizhou) | S. triangulatus, Palaeosulcachites minus, Trapezochites chordoides, S. intermedius, S. bisulcatus, S. equilateralis (106513) S. triangulatus, Palaeosulcachites shipaiensis (106514) | |
| Meishucunian | China (Shaanxi) | S. intermedius, S. pusilliformis (107790) S. sp., Palaeosulcachites irregularis (107774) | |
| Meishucunian | China (Zhejiang) | S. carinatus (108039) | |
| Meishucunian | China (Hubei) | Palaeosulcachites biformis (155446) Palaeosulcachites shipaiensis (107634 107636 107665) | |
| Meishucunian - Tommotian | China (Yunnan) | S. triangularis (96284 96449) | |
| Stage 2 | France (Heraultia) | S. triangularis (234355) | |
| Stage 2 | France (Herault) | S. triangularis (239269) | |
| Tommotian | Russian Federation (Siberia) | S. sp. (50319 50428) | |
| Tommotian | China (Hubei) | S. triangularis, Palaeosulcachites biformis (155444) | |
| Tommotian | Russian Federation (Krasnoyarsk Krai) | S. triangularis (233166) | |
| Tommotian | Russian Federation (Khabarovsk Krai) | S. sp. (50314) | |
| Tommotian | China (Yunnan) | S. triangularis (94556 171902) | |
| Delamaran | Jordan | Siphogonuchites indet. (139936) |