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Geniculograptus

Pterobranchia - Diplograptoidea - Diplograptidae

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).

Synonymy list
YearName and author
1987Geniculograptus Mitchell pp. 381 - 382
2002Geniculograptus Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumHemichordataBateson 1885
RankNameAuthor
classPterobranchiaLankester 1877
classGraptolithina(Bronn 1849)
orderDiplograptoidea()
familyDiplograptidae
subfamilyPeiragraptinaeJaanusson 1960
genusGeniculograptus

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
ReferenceDiagnosis
C. E. Mitchell 1987Aseptate, 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.