Graptoloidea Lapworth, 1873
|
publication ID |
https://doi.org/ 10.4202/app.2008.0307 |
|
persistent identifier |
https://treatment.plazi.org/id/BA11F872-8D6C-FF9D-DA47-D0D0089EF97B |
|
treatment provided by |
Felipe |
|
scientific name |
Graptoloidea Lapworth, 1873 |
| status |
|
Order Graptoloidea Lapworth, 1873 Family Monograptidae Lapworth, 1873 Genus Cochlograptus Obut, 1987
Type species. Nautilus veles Richter, 1871 , Upper Llandovery, Thuringia, Germany. Lectotype BGR X 1154 a from original Richter collection chosen by Maletz (2001: fig. 3A).
Emended diagnosis.—Disk−shaped, ventrally and continuously planispiral rhabdosome, possessing 1.5–2 whorls. Thecae of monograptid type, hook−shaped, curved with drawn−out ends and strongly inflated, with well−developed lateral spines. Sicula moderately to strongly ventrally curved. Prominent triangular rutellum on sicula. Rhabdosome sharply ventrally deflected near tip of sicula. Post−sicular development via strongly deflected nema or, rarely, pseudovirgula that originates slightly below tip of sicula.
| BGR |
Bundesanstalt fur Geowissenschaften und Rohstoffe |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.