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Plectograptus (Sokolovograptus)

Pterobranchia - Bireclinata - Retiolitidae

Taxonomy
Sokolovograptus was named as a genus. It is not extant.

It was reranked as Plectograptus (Sokolovograptus) by Lenz and Melchin (1987).

It was assigned to Plectograptus by Lenz and Melchin (1987); and to Graptoloidea by Sepkoski (2002).

Synonymy list
YearName and author
1987Plectograptus (Sokolovograptus) Lenz and Melchin p. 168
2002Sokolovograptus Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumHemichordataBateson 1885
classPterobranchiaLankester 1877
classGraptolithina(Bronn 1849)
Graptoloida
Eugraptoloida
RankNameAuthor
Reclinata
superorderPanbireclinata
orderBireclinata
infraorderAxonophora(Frech 1897)
infraorderNeograptinaStorch et al. 2011
superfamilyRetiolitoideaLapworth 1873
familyRetiolitidaeLapworth 1873
subfamilyPlectograptinaeBoucek and M√ľnch 1952
genusPlectograptus
subgenusSokolovograptus

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
A. C. Lenz and M. J. Melchin 1987Virgula free, attached only to ancora, extends only to level of theca 4 or 5. Corona of few lists, weakly rounded, rectangular in cross-section. Clathrium and reticulum complex and disorderly, meshes polygonal to triangular to quadrate, relatively fine proximally, becoming coarser distally. Thecae generally climacograptid proximally (pi. 3, fig. 13), more or less orthograptid distally. Thecae marked by one or two shorter, transverse, curved lists, the outer margins of which are sometimes joined by a vertical list, and by a longer and more projecting lower apertural lip. Rhabdosome rectangular in crosssection, widening abruptly proximally, and then maintaining constant width or widening very gradually. Occasional specimens narrow slightly distally. Seams of lists all face inward making distinction between clathrium and reticulum difficult; in this way it differs from other plectograptids.