DOI: 10.5061/dryad.0vt4b8h4g
title: Data from: Late Ordovician and Early Silurian virgianid and stricklandioid brachiopods from North Greenland: Implications for a warm-water faunal province

description: 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)
 ribbing, also occurs in North Greenland, represented by K. heimdalli sp.
 nov., which has the largest and most strongly biconvex shells for the
 genus. Palaeogeographically, the Late Ordovician virgianid fauna of
 Laurentia was highly distinct, confined to the low–mid tropical latitudes
 north of the palaeoequator. In comparison, the early Silurian (Rhuddanian)
 Virgiana and some related taxa in Laurentia spanned the tropics of both
 hemispheres, forming extensive shell beds in carbonate basins, although
 Borealis and Borealoides gen. nov. remained confined largely to the
 northern hemisphere, suggesting a certain level of provincialism extending
 into the earliest Silurian. The unusual abundance and richness of the
 virgianid faunas in North Greenland is likely explained by a
 palaeoecological preference for warm-water carbonate settings.
description: 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.<br>http://palaeo-electronica.org/2001_1/past/issue1_01.htm.
description: ## 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).
 Manitoba, Stony Mountain Formation (Jin and Zhan 2001) * Mackenzie
 Mountains, western marginal platform; lower Whittaker Formation (updated
 in Jin and Blodgett 2020) * Iowa, upper Maquoketa Group (Wang 1949) *
 Texas, Montoya Group, Trans-Pecos Texas (Howe and Reso 1967) * Tennessee,
 Fernvale Formation (Howe 1988) * Oklahoma, Unit 3C, Viola Springs
 Formation (Alberstaft 1973) * Wyoming, Bighorn Dolomite (Macomber 1970) *
 Avalonia: England?Wales?southern Ireland (Cocks, 2008) * Baltica, Estonia
 and Lithuania, Pirgu Stage (Pa?kevi?ius 1994; Hints and Harper 2003;
 R??musoks 2004) * Boda Limestone, Sweden, Baltica (Cocks 2005) * Gorny
 Altai, Orlov Horizon (Kulkov and Severgina 1989) * Kazakhstan terranes,
 upper Chokpar Formation and Dulankara Horizon, Dulankara, (Nikitin et al.
 2006) * Scotland, Girvan district, (Cocks, 2008) * Sette-Daban, Siberian
 Platform, Nirunda and Bur horizons (Rozman 1970; Yadrenkina 1978) * South
 China, Xiazhen Formation, JYC area (Zhan and Cocks 1998) * Taimyr,
 Siberian Platform, Korotkinskaya Formation (Cocks and Modzalevskaya 1997;
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