Geoscience Reference
In-Depth Information
Table 1. Habitat of early stegocephalians and other early sarcopterygians. Taxa are listed in phylogenetic and stratigraphic order. Habitat 0: marine; 1: brackish
water; 2: freshwater (and potentially terrestrial, in many cases). Terrestrial taxa are excluded from this analysis since the purpose is to determine if aquatic or
amphibious taxa inhabited fresh, brackish or saline water, and a terrestrial habitat cannot readily be inserted into an ordered salinity gradient. The locality
information is not necessarily exhaustive; at least one is given for each taxon
Taxa
Locality or formation
Habitat
Geological age
Reference for habitat
Youngolepis praecursor
Qujing Xian, Yunnnan, China
0/1
Lochkovian
Chang (1982, p. 6)
Diabolepis speratus
Qujing Xian, Yunnnan, China
0/1
Lochkovian
Chang (1982, p. 6)
Jessen (1980); Cl ยด ment & Janvier (2004, p. 93)
Powichthys thorsteinssoni
Drake Bay Formation, Prince of Wales
Island, Canada
0
Lochkovian
Osteolepididae
Tangil-e-Ab-Garm, Iran
0
Frasnian
Janvier & Martin (1979, p. 508); Janvier (1980, p. 228)
Eusthenopteron
Miguasha, Escuminac Formation, Canada
0/1
Frasnian
Chidiac (1996); Cloutier et al. (1996); Schultze &
Cloutier (1996); Clack (2007)
Gogonasus
Gogo, Australia
0
Frasnian
Clack (2007, p. 514)
Panderichthys
Lode, Ketleri Formation, Latvia;
Rybnica, Orel region, Russia
1
Frasnian
Luksevics (1992); Vorobyeva & Kuznetsov (1992);
Schultze & Cloutier (1996); Luksevics & Zupins
(2004); Clack (2007, p. 512)
Elpistostege
Miguasha, Escuminac Formation, Canada
0/1
Frasnian
Chidiac (1996); Cloutier et al. (1996); Schultze &
Cloutier (1996); Clack (2007, p. 512)
Livoniana
Ligatne, Gauja Formation, Latvia
?
Givetian
Long & Gordon (2004, p. 703)
Tiktaalik
Bird Fiord, Ellesmere Island, Fram
Formation, Canada
2
Frasnian
Daeschler et al. (2006)
Obruchevichthys
Ketleri, Latvia
?
Frasnian
Elginerpeton
Scat Craig, Scotland
1/2
Frasnian
Ahlberg (1998, p. 133); Long & Gordon (2004,
p. 703); Blieck et al. (2007, p. 221)
Metaxygnathus
Jemalong, New South Wales, Australia
1/2
Frasnian
Lebedev (2004; state 1); Long & Gordon (2004, p. 703;
state 2); Blieck et al. (2007, p. 221)
Jakubsonia
Gornostayevka quarry, Russia
1
Frasnian
Lebedev (2004, p. 93)
Sinostega
Ningxia Hui autonomous region, China
1/2
Frasnian
Zhu et al. (2002; state 2); Lebedev (2004; state 1)
Ventastega
Pavari, Ketleri Formation
0/1
Famennian
Luksevics & Zupins (2004); Lebedev (2004, p. 92);
Clack (2006, p. 183); Clack (2007, p. 512)
Acanthostega
East Greenland
2
Famennian
Long & Gordon (2004, p. 703); Blom et al. (2005,
p. 46)
Ichthyostega
East Greenland
2
Famennian
Long & Gordon (2004, p. 703); Blom et al. (2005,
p. 46)
Densignathus
Red Hill, USA
1/2
Famennian
Daeschler et al. (1994; state 2); Lebedev (2004, p. 92;
state 1); Long & Gordon (2004, p. 703; state 2)
Hynerpeton
Red Hill, USA
1/2
Famennian
Daeschler et al. (1994; state 2); Lebedev (2004, p. 92;
state 1); Long & Gordon (2004, p. 703; state 2)
(Continued )
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