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Didymograptus holmi
Taxonomy
Didymograptus holmi was named by Törnquist (1901). It is not extant.
It was recombined as Expansograptus holmi by Lo Valvo et al. (2020).
It was recombined as Expansograptus holmi by Lo Valvo et al. (2020).
Sister species lacking formal opinion data
D. acutus, D. adamantinus, D. affinis, D. asperus, D. bifidis, D. caduceus, D. clavalus, D. compressus, D. denticulatus, D. dilatans, D. eudous, D. formosus, D. geminus, D. geminus, D. gemminus, D. halli, D. indentus, D. missilis, D. mundus, D. navis, D. nicholsoni, D. nicholsoni, D. nilidus, D. pakrianus, D. perneri, D. protoindentus, D. retroflexus, D. rigoletto, D. sagitticaulis, D. serratulus, D. simulans, D. aequalis
Synonymy list
| Year | Name and author |
|---|---|
| 1901 | Didymograptus holmi Törnquist p. 12 figs. pl. 1, figs. 1, 9, 11, 14 |
| 2020 | Expansograptus holmi Lo Valvo et al. p. 543 fig. 3.10 |
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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.
†Didymograptus holmi Törnquist 1901
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Aberhan 1992, Aberhan et al. 2004 | |||||
Age range: Floian or 477.10000 to 471.30000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Ordovician | Argentina (Jujuy) | Expansograptus holmi (220276 238721) | |
| Floian | Argentina (Jujuy) | Expansograptus holmi (220286) | |
| Arenig | Canada (Yukon) | Didymograptus holmi (204014) | |
| Arenigian | Argentina (Jujuy) | Expansograptus holmi (220318) |