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Levisograptus

Pterobranchia - Diplograptoidea

Synonymy list
YearName and author
2011Levisograptus Maletz pp. 855 - 856

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
RankNameAuthor
phylumHemichordataBateson 1885
classPterobranchiaLankester 1877
classGraptolithina(Bronn 1849)
orderDiplograptoidea()
genusLevisograptus

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
J. Maletz 2011Biserial graptolites with a pattern U astogeny, a broad, fairly symmetrical proximal end and thecae with a rounded or flowing geniculum and incipient to well-developed lateral apertural lappets; manubrium structure lacking downward growth of thecae or lacking altogether; thecae long and double sigmoid in shape; infradorsal thecal walls vertical to outwardly inclined; apertural spines at least on first thecal pair, rarely on distal thecae; rhabdosome parallel-sided to distally widening.