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Table 5 Middle Devonian eubrachythoracids

From: A large Middle Devonian eubrachythoracid ‘placoderm’ (Arthrodira) jaw from northern Gondwana

Taxon

Group

Body size (cm)

Period

Locality

References

Belgiosteus mortelmansi

Coccosteomorph

36

Givetian

Belgium

Lehman (1973)

Clarkosteus halmodeus

Coccosteomorph

57

Givetian–Frasnian

USA (NY)

Clarke (1894)

Coccosteus cuspidatus

Coccosteomorph

40

Eifelian–Givetian

Scotland

Miles and Westoll (1968)

Dickosteus threiplandi

Coccosteomorph

50

Givetian

Scotland

Denison (1978)

Livosteus grandis

Coccosteomorph

210

Givetian

Latvia

Obrucheva (1962)

Millerosteus minor

Coccosteomorph

10

Givetian

Scotland

Denison (1978)

Protitanichthys rockportensis

Coccosteomorph

110

Givetian

USA (Michigan)

Case (1931)

Watsonosteus fletti

Coccosteomorph

58

Givetian

Scotland

Watson (1932)

Beyrichosteus radiatus

Coccosteomorph?

52

Givetian

Germany

Otto (2005)

Eastmanosteus pustulosus

Pachyosteomorph

170

Givetian–Frasnian

USA

Boylan (1973)

?Easmanosteus sp.

Pachyosteomorph

?

Givetian

Morocco

Lehman (1976)

Kiangyousteus yohii

Pachyosteomorph

120

Givetian

China

Zhu and Zhu (2013)

Hollardosteus

Pachyosteomorph

?

Givetian

Morocco

Lehman (1976)

Carolowilhemina geognostica

Pachyosteomorph

300

Eifelian

Spain

Mark-Kurik and Carls (2002)

Panxiosteus oculus

Pachyosteomorph

38

Givetian–Frasnian

China

Wang (1979)

Eastmanosteus yunnanensis

Pachyosteomorph

110

Givetian

China

Wang (1991)

  1. The body sizes in red are estimates taken from Sallan and Galimberti (2015). However, the estimate for Belgiosteus appears erroneous (estimated at 3.6-m long with a 62-mm cranial roof). Considering the cranium sizes given by Denison (1978), Belgiosteus was a little smaller that Coccosteus, which suggests that the body size written by Sallan and Galimberti may have resulted from a misplaced comma with 360 mm (0.36 m) being correct. Values marked by “?” are unknown