Maryland Department of Natural Resources

Carboniferous-Permian Fossils

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Alethopteris serlii Sphenophyllum filiculme Asterophyllites equisetiformis Sphenopteris lescuriana Mariopteris nervosa Lepidodendeon aculeatum Calamites approximatus Sigillaria leptoderma Taeniopteris newberriana Productus semireticulatus Productus nebraskensi Seminula subtilita Eumetria verneuiliana Eumetria verneuiliana Allorisma terminale Seminula trinuclea Chonetes flemingi Marginifera muricata Chonetes mesolobus Spirifer rockymontanus Spiriferina kentuckyensis (front view) Spiriferina kentuckyensis (dorsal view) Hustedia mormoni Pugnax utah Spirifer keokuk
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Carboniferous-Permian

Fig. 1 Alethopteris serlii Brongniart
Fig. 2 Sphenophyllum filiculme Lesquereux
Fig. 3 Asterophyllites equisetiformis Brongniart
Fig. 4 Sphenopteris lescuriana Fontaine
Fig. 5 Mariopteris nervosa (Brongniart)
Fig. 6 Lepidodendeon aculeatum Sternberg
Fig. 7 Calamites approximatus Schlotheim
Fig. 8 Sigillaria leptoderma Lesquereux
Fig. 9 Taeniopteris newberriana Fontaine
Fig. 10 Productus semireticulatus Martin
Fig. 11 Seminula trinuclea Hall
Fig. 12 Chonetes flemingi Norwood & Pratten
Fig. 13 Productus nebraskensis Owen
Fig. 14 Marginifera muricata Norwood & Pratten
Fig. 15 Chonetes mesolobus Norwood & Pratten
Fig. 16 Spirifer rockymontanus Marcou
Fig. 17 Spiriferina kentuckyensis Shumard (front view)
Fig. 18 Spiriferina kentuckyensis Shumard (dorsal view)
Fig. 19 Spirifer keokuk Hall
Fig. 20 Hustedia mormoni Marcou
Fig. 21 Pugnax utah Marcou
Fig. 22 Seminula subtilita Hall
Fig. 23 Allorisma terminale Hall
Figs. 24 Eumetria verneuiliana Hall
Figs. 25 Eumetria verneuiliana Hall
Reference: Clark, W.B., et al., 1906, Volume VI, Maryland Geological Survey, Baltimore, MD