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Thrissops
Taxonomy
Thrissops was named by Agassiz (1833) [Sepkoski's age data: J Kimm-u J Tith-u Sepkoski's reference number: 452,915].
It was assigned to Psylopterygii by Wagner (1863); to Leptolepidae by Woodward (1895), Woodward (1919); to Ichthyodectidae by Patterson (1975), Patterson and Rosen (1977); to Pachycormiformes by Sepkoski (2002); to Ichthyodectiformes by Cavin et al. (2013); and to Allothrissopidae by van der Laan (2019).
It was assigned to Psylopterygii by Wagner (1863); to Leptolepidae by Woodward (1895), Woodward (1919); to Ichthyodectidae by Patterson (1975), Patterson and Rosen (1977); to Pachycormiformes by Sepkoski (2002); to Ichthyodectiformes by Cavin et al. (2013); and to Allothrissopidae by van der Laan (2019).
Species
Entered
by J. Sepkoski on 2003-01-23; modified by M. Clapham on 2021-08-01
Synonymy list
| Year | Name and author |
|---|---|
| 1833 | Thrissops Agassiz p. 12 figs. Vol I, Pl E, fig 2 |
| 1863 | Thrissops Wagner |
| 1895 | Thrissops Woodward p. 521 |
| 1919 | Thrissops Woodward p. 136 |
| 1975 | Thrissops Patterson p. 282 |
| 1977 | Thrissops Patterson and Rosen p. 116 |
| 2002 | Thrissops Sepkoski |
| 2013 | Thrissops Cavin et al. p. 170 |
| 2019 | Thrissops van der Laan p. 60 |
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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. †Thrissops Agassiz 1833
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†Thrissops angustus Münster 1842
†Thrissops cephalus Agassiz 1834
†Thrissops curtus Woodward 1919
†Thrissops exiguus Bassani 1879
†Thrissops formosus Agassiz 1833
†Thrissops molossus Woodward 1919
†Thrissops portlandicus Woodward 1895
†Thrissops subovatus Agassiz 1843
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Wagner 1863 | Dorsal fin. Set far back, opposite the very long anal fin, the inner rays of the caudal fin obliquely and step-like segmented behind the base; the mouth strongly upturned, the jaws equipped with fine teeth.
Agassiz identified five species from the lithographic shales as Thrissips formosus, cephalus, salmoneus, subovatus, and mesogaster. These fish are most numerous near Eichstädt and Kelheim. They are very rare near Nusplingen, but more frequently near Cirin, where Thiolliere suspected the occurrence of Thr. formosus, salmoneus, mesogaster, and cephalus, and also proposed two new species as Thr. Heckeli and Ragleyi. — Of the species he listed, Agassiz only illustrated and described in detail the first two (1). I have arranged these Thrissips species as follows. i) Body shape relatively broad, caudal fin very long and deeply forked. 1) Heckel later also classified his Chirocentrites microdon (from Tertiary strata of the island of Lesina in Dalmatia) as Thrissops, which I consider incorrect, since that species possesses neither blind fin rays nor the coronoid process of the lower jaw, but instead has serrations on the preopercle that are not found in Thrissops; moreover, its scales are decidedly without enamel coatings. |
Measurements
No measurements are available
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| Source: o = order, subp = subphylum | |||||
| References: Carroll 1988, Hendy et al. 2009 | |||||
Age range: base of the Late/Upper Kimmeridgian to the top of the Cenomanian or 152.21000 to 93.90000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Kimmeridgian | Germany (Baden-Württemberg) | T. subovatus (154138) | |
| Late/Upper Kimmeridgian - Early/Lower Tithonian | Germany (Bayern) | T. formosus, T. angustus (228758) | |
| Early/Lower Tithonian | Germany (Bayern) | T. formosus (118174) | |
| Late/Upper Tithonian | Türkiye | T. sp. (68641) | |
| Early/Lower Berriasian - Middle Berriasian | France (Poitou-Charentes) | T. sp. (61930) | |
| Cenomanian | Germany | T. formosus, T. angustus (138006) | |
| Late/Upper Cenomanian | Croatia | T. exiguus (123565) |