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Scolenaspididae
Taxonomy
Scolenaspididae was named by Afanassieva (1991). Its type is Scolenaspis.
It was assigned to Scolenaspidoidei by Voichyshyn (2011), van der Laan (2019).
It was assigned to Scolenaspidoidei by Voichyshyn (2011), van der Laan (2019).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1991 | Scolenaspididae Afanassieva |
| 2011 | Scolenaspididae Voichyshyn p. 150 |
| 2019 | Scolenaspididae van der Laan p. 23 |
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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.
Fm. †Scolenaspididae Afanassieva 1991
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G. †Ukrainaspis Sansom 2009
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†Ukrainaspis kozlowskii Zych 1937
Invalid names: Heraspis Afanassieva 1991 [replaced]
G. †Zychaspis Janvier 1985
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†Zychaspis bucovinensis Voichyshyn 2011
†Zychaspis concinna Voichyshyn 2001
†Zychaspis elegans Balabai 1962
†Zychaspis granulata Voichyshyn 2011
†Zychaspis siemiradzkii Janvier 1985
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| V. Voichyshyn 2011 | Medium sized osteostracans (L ranges from 50 to 120 mm). The headshield is, as a rule, low, but may also be dome−shaped and massive. The abdominal part of the shield has a small median dorsal crest, or it may develop a dorsal spine. The cornual processes are of various length. The hypophysial division of the nasohypophysial opening is approximately equal to, or slightly larger than, the nasal division. The pineal plate is usually well developed. The median dorsal field is rather narrow. The lateral fields are nar− row, and may have only a slight widening in their posterior parts, reaching backwards not further than to the proximal part of the dorsal surface of the cornual processes. The ornamentation consists of either tiny, densely set tubercles or of small tesserae covered with minute tubercles. |
Measurements
No measurements are available
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| Source: subp = subphylum, p = phylum | |||||
| References: Bambach et al. 2007, Carroll 1988, Kiessling 2004 | |||||
Age range: base of the Early/Lower Lochkovian to the top of the Pragian or 419.62000 to 410.62000 Ma
Collections (16 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Lochkovian | United Kingdom | Scolenaspis sp. (238749) | |
| Lochkovian | Ukraine | Heraspis kozlowskii (239230) Ukrainaspis kozlowskii (239228 239229) Ukrainaspis kozlowskii, Zychaspis concinna, Zychaspis siemiradzkii (239251) Zychaspis concinna, Zychaspis siemiradzkii (239253) Zychaspis siemiradzkii (239217 239250) | |
| Lochkovian | Norway | Scolenaspis sp. (237826) | |
| Lochkovian | Svalbard and Jan Mayen | Scolenaspis signata (238410 238869) | |
| Lochkovian - Pragian | Ukraine | Cephalaspis kozlowskii (23447) | |
| Lochkovian - Eifelian | Ukraine (Ternopil) | Ukrainaspis kozlowskii, Zychaspis granulata, Zychaspis siemiradzkii (237769) | |
| Pragian | Ukraine | Cephalaspis bucovinensis (90348) Zychaspis elegans (239247) Zychaspis siemiradzkii (239249) |