Late Ordovician and Early Silurian virgianid and stricklandioid brachiopods from North Greenland: Implications for a warm-water faunal province

An unusually rich and diverse suite of virgianid brachiopods, hitherto poorly known, are systematically described here for the first time from the Ordovician–Silurian boundary interval (late Katian–Aeronian) of North Greenland. The Late Ordovician virgianids comprise typical taxa of the warm-water Tcherskidium fauna (e.g. Tcherskidium tenuicostatum, Proconchidium schleyi, Holorhynchus giganteus, and Deloprosopus dawesi sp. nov.). Among the early Silurian taxa, Virgiana hursti sp. nov. occurs as abundant shell beds, similar to other congeneric species in Laurentia, but has somewhat larger internal skeletal structures, albeit not as extravagantly developed as in the late Katian virgianids; Boraeloides balderi gen. et sp. nov. shows extreme thickening of shell wall and internal structures, approaching the extravagant calcification of Katian virgianids. The highly distinct mid-Aeronian stricklandioid brachiopod genus, Kulumbella, characterized by a shell with criss-cross (divaricate) ribbin..., , In the spreadsheet, presence of genus = 1; absence of genus = 0
Cluster anaylisis was performed using PAST (Hammer et al. 2001), a free online software package widely used for statistical analyses of palaeontological data. Similarity coefficient = Raup-Crick. 
Hammer, Ø., Harper, D.A.T., and Ryan, P.D., 2001. PAST: PAleontological STatistics software package for education and data analysis. Palaeontologia Electronica, v. 4, 9 p.http://palaeo-electronica.org/2001_1/past/issue1_01.htm., ## Data from: Late Ordovician and Early Silurian virgianid and stricklandioid brachiopods from North Greenland: implications for a warm-water faunal province

Late Ordovician (late Katian) brachiopod faunal list used for cluster analysis

### Data Structure:

Cases (Column 1: localities)
Variables (Row 1: brachiopod genera; 1=presence; 0=absence)

Faunal data were derived from the following sources:
Cluster analysis of late Katian (Richmondian) brachiopod faunas from Laurentia and other tectonic plates (Fig. 4 of the main paper) is based on following sources (Data 1: Data1_Late Katian Brachiopod Faunal List.xls).

* Anticosti Island, Quebec, Vaureal Formation (Dewing 1999, Jin and Zhan 2008)
* Cincinnati Arch, Richmondian strata of Ohio-Kentucky-Indiana border region (Davis 1985)
* East-Central Alaska (Jin and Blodgett 2020)
* Alaska Terranes, Upper Katian strata, western Alaska (Rasmussen et al., 2012; Jin et al. 2022)
* Hudson Bay, Churchill River Group (Jin et al. 1997). Ma...