Semigothograptus, Kozłowska, Anna, 2016

Kozłowska, Anna, 2016, A new generic name, Semigothograptus, for Gothograptus? meganassa Rickards & Palmer, 2002, from the Silurian post- lundgreni Biozone recovery phase, and comparative morphology of retiolitids from the lowermost upper Homerian (upper Wenlock), Zootaxa 4208 (6), pp. 534-546 : 536

publication ID

https://doi.org/ 10.11646/zootaxa.4208.6.2

publication LSID

lsid:zoobank.org:pub:32BF47BA-AFE5-4C6F-816F-1EAECB3DA3BB

DOI

https://doi.org/10.5281/zenodo.5670206

persistent identifier

https://treatment.plazi.org/id/5F6B647F-CB46-FFC2-1ACD-DE063E14337C

treatment provided by

Plazi

scientific name

Semigothograptus
status

gen. nov.

Genus Semigothograptus new genus

Etymology. The generic name Semigothograptus is derived from semi (half in Latin) and Gothograptus Frech, 1897 indicating some similarity to the genus Gothograptus .

Type and only species. Gothograptus ? meganassa ( Rickards & Palmer, 2002)

Type locality. Aston Piggot , Long Mountain , Shropshire, UK; material deposited in the Sedgwick Museum, Cambridge ( Rickards & Palmer 2002).

Diagnosis. Tubarium widening gradually from proximal end, nema free. Ancora umbrella simple, a pair of large looping meshes on each side of tubarium. Proximal ventral orifices of triangular shape; lateral orifices kidney-shaped. Ventral wall represented by mid-ventral lists, lips, genicular list, and long lateral apertural rods convex towards the centre of lateral wall, which become distinctly sigmoidal the more distal they are. Oblique clathrial lists on lateral walls.

Remarks. The new genus Semigothograptus has a free nema, which therefore does not affect the pattern of the lateral wall, whereas Gothograptus , to which the described species was tentatively designated by Rickards and Palmer, has the nema connected to the lateral (obverse) side of the tubarium ( Fig. 1 View FIGURE 1 A). The long lateral apertural rods, convex towards the centre of lateral wall, are unique to Semigothograptus .

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