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Taxonomy
Proetus planimarginatus was named by Meek (1871).
It was recombined as Dechenella (Dechenella) planimarginata by Stumm (1953); it was recombined as Dechenella planimarginata by Lieberman (1994).
It was recombined as Dechenella (Dechenella) planimarginata by Stumm (1953); it was recombined as Dechenella planimarginata by Lieberman (1994).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1871 | Proetus planimarginatus Meek p. 89 |
| 1873 | Proetus planimarginatus Meek p. 233 figs. pl. 23, fig. 3a, b |
| 1888 | Proetus delphinulus Hall and Clarke pp. 111- 112 figs. pl. 23, figs. 1, 2; pl. 25, fig. 6 |
| 1953 | Dechenella (Dechenella) planimarginata Stumm pp. 20-21 figs. pl. 3, figs. 8-13 |
| 1953 | Dechenella (Dechenella) delphinula Stumm pp. 21-22 figs. pl. 3, fig. 6 |
| 1994 | Dechenella planimarginata Lieberman pp. 122 - 123 |
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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.
†Dechenella planimarginata Meek 1871
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Invalid names: Dechenella delphinula Hall and Clarke 1888 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| B. S. Lieberman 1994 | Anterior portion of intraoccipital lobe flexes anteriorly beyond anterior portion of SO; space between anteromedian portion of eye and anterior border furrow equal to twice orthogonal distance between anterolateral portion of intraoccipital furrow and distal tip of SI; anterior cephalic border concave dorsally; facial suture anterior ofanterior border furrow proceeds anteriorly for short distance anterior of furrow, then deflects sharply medially; anterior margin ofpygidial pleurae in dorsal view sinusoidally shaped; laterally pygidial axial rings in dorsal view flex anteriorly before flexing posteriorly; 16 axial rings; border reaches point of constant width opposite pleural segment five. |
Measurements
No measurements are available
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| Source: f = family, o = order, c = class | |||||
| References: Hendy 2009, Aberhan et al. 2004, Fortey and Owens 1999 | |||||
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Emsian | Canada (Nunavut) | Dechenella planimarginata (26596 26640) | |
| Eifelian | USA (Michigan) | Dechenella planimarginata (207848) | |
| Eifelian | USA (Ohio) | Dechenella planimarginata (207849) | |
| Givetian | Canada (Ontario) | Dechenella delphinula (9476) |