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Pleuroacanthites
Taxonomy
Pleuroacanthites was named by Canavari (1883) [Sepkoski's age data: J Hett Sepkoski's reference number: 1066]. It is not extant. Its type is Ammonites biformis.
It was assigned to Pleuroacanthitidae by Yin et al. (2007); to Pleuroacanthinae by Hoffmann (2010); and to Pleuroacanthitinae by Hoffmann (2015).
It was assigned to Pleuroacanthitidae by Yin et al. (2007); to Pleuroacanthinae by Hoffmann (2010); and to Pleuroacanthitinae by Hoffmann (2015).
Species
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1883 | Pleuroacanthites Canavari p. 279 |
| 1900 | Parapsiloceras Hyatt p. 574 |
| 2007 | Pleuroacanthites Yin et al. p. 721 |
| 2010 | Pleuroacanthites Hoffmann p. 18 |
| 2015 | Pleuroacanthites Hoffmann p. 1 |
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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. †Pleuroacanthites Canavari 1883
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†Pleuroacanthites biformis Sowerby 1831
†Pleuroacanthites charlottensis Longridge et al. 2008
†Pleuroacanthites mulleri Guex 1980
†Pleuroacanthites psilomorphum Guex 1995
Invalid names: Parapsiloceras Hyatt 1900 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. Hoffmann 2015 | Very evolute, many whorls, whorl section depressed in earliest whorls, subcircular later; early whorls bear lateral parabolic nodes, which turn into curved parabolic lines on middle whorls that are markedly rursiradiate on the whorl sides, and curve strongly forwards over the ventrolateral shoulders to form a long ventral sinus; adult body chamber may have an obliquely angled venter and large ventrolateral parabolic spines; occasional constrictions on the inner whorls; suture line lytoceratid, but with phylloid saddle endings; possibly dimorphic from the presence of small-sized adult microconchs (Wähner, 1894; Wiedmann, 1970; Guex, 1980) |
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| height | 9 | 9.88 | 6.30 | 20.5 | 8.00 | 5.26 | |
| diameter | 9 | 46.2 | 23.8 | 203.0 | 44.3 | 56.8 | |
| inflation | 9 | 23.9 | 12.1 | 119.0 | 22.8 | 34.0 | |
| shell height | 1 | 3.00 | - | - | - | - | |
| shell diameter | 1 | 8.50 | - | - | - | - |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: Hettangian or 201.30000 to 199.30000 Ma
Collections (18 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Hettangian | China | P. biformmis (73931) | |
| Liasicus | Canada (British Columbia) | P. biformis (84923 84969 84970) P. biformis, P. charlottensis (84926 84964) P. charlottensis (84962) P. sp. (84734) | |
| Liasicus | USA (Nevada) | P. biformis (188632 188642) P. mulleri (188605 188608 188609 188610 188641 188643) P. psilomorphum (188602) | |
| Liasicus | USA (Alaska) | P. mulleri (68689) |