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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Geniculograptus
Taxonomy
Geniculograptus was named by Mitchell (1987) [Sepkoski's age data: O Cara-l O Ashg-m Sepkoski's reference number: 722].
It was assigned to Peiragraptinae by Mitchell (1987); and to Graptoloidea by Sepkoski (2002).
It was assigned to Peiragraptinae by Mitchell (1987); and to Graptoloidea by Sepkoski (2002).
Species
Synonymy list
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. E. Mitchell 1987 | Aseptate, gradually widening rhabdosomes with narrow proximal end; slightly outwardly inclined amplexograptid thecae bearing a variably prominent genicular flange; primordial astogeny follows Pattern F; sicula is extensively exposed on the obverse side of the rhabdosome and bears paired antivirgellar spines in addition to the virgella. Thl1 mayor may not bear a mesial spine. Th 12 bears no spines. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Aberhan et al. 2004, Aberhan 1992 | |||||
Age range: base of the Edenian to the top of the Maysvillian or 451.00000 to 449.60000 Ma
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Actonian - Onnian | Argentina | G. sp. (8887) | |
| Katian | USA (New York) | G. pygmaeus (204767) | |
| Edenian | USA (Kentucky) | G. sp. (48779 48781) G. typicalis (87844) | |
| Edenian - Maysvillian | USA (Michigan) | Climacograptus pygmaeus (26337 26338) | |
| Maysvillian | USA (Michigan) | Climacograptus pygmaeus (145605) |