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Bryantonchus peracutus
Taxonomy
Onchus peracutus was named by Bryant (1934).
It was recombined as Bryantonchus peracutus by Burrow (2007) and Burrow and Elliott (2023).
It was recombined as Bryantonchus peracutus by Burrow (2007) and Burrow and Elliott (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1934 | Onchus peracutus Bryant |
| 1979 | Onchus peracutus Denison |
| 2007 | Bryantonchus peracutus Burrow p. 835 figs. Figures 6.11-6.15, 9.6, 9.7, ?9.8, ?9.9; Table 1 |
| 2023 | Bryantonchus peracutus Burrow and Elliott p. 4 figs. Fig. 3A-C |
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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.
†Bryantonchus peracutus Bryant 1934
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| Burrow 2007 | Diplacanthiform acanthodian, bearing fin spines with subcircular cross section; smooth exserted surface sometimes with weak longitudinal ridges on proximal third; short insertion area bearing fine, close-set, parallel ridges which extend for whole length of spine under smooth outer layer forming exserted sur face; central pulp cavity enclosed for most of length of trailing edge; rounded-edged, medial channel along trailing edge; wide central pulp canal; outer dentine layer with evenly spaced, narrow longitudinal dentine canals from which fine dentine tubules ra diate towards outer surface; highly vascular inner layer overlain by osteodenteons formed round densely distributed longitudinal canals at proximal end, with no boundary between inner and outer layers; rest of spine with boundary between inner and outer lay ers, and inner layer with fine dentine tubules radiating from cen tral pulp cavity |
Measurements
No measurements are available
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| Source: c = class, subp = subphylum | |||||
| References: Aberhan et al. 2004, Carroll 1988 | |||||
Age range: base of the Late/Upper Emsian to the top of the Emsian or 402.50000 to 393.30000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Emsian | USA (Wyoming) | Onchus peracutus (26176) | |
| Late/Upper Emsian | USA (California) | Bryantonchus peracutus (206449) |