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![Figure 11. Amphilichas effnensis; all are from the Effna Formation (Upper Ordovician) of Virginia. 1–3, A. effnensis, holotype cranidium, dorsal, lateral, anterior views, ×2.5, OU 12493; 4–6, A. effnensis, cranidium, dorsal, lateral, anterior views, ×4, OU 12494]()
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![Figure 10. AmphilichasRaymond, 1905; 1–4, 7–8 are from the Bromide Formation (Upper Ordovician) of Oklahoma, 5–6, 9–10 are from the Effna Formation (Upper Ordovician) of Virginia. 1–3, Amphilichas subpunctatus (Esker, 1964, pl. 3 figs. 1–4) holotype cranidium, dorsal, anterior, lateral views, ×2, OU 5203; 4, A. subpunctatus pygidium, dorsal view, ×2, OU 12486; 5, Amphilichas effnensis, cranidium, dorsal view, ×4, OU 12487; 6. A. effnensis cranidium, dorsal view, ×3, OU 12488; 7, A. subpunctatus hypostome, dorsal view, ×3, OU 12489; 8, A. subpunctatus cranidium, dorsal view, ×2, OU 12490; 9, Amphilichas sp. 1 hypostome, dorsal view, ×2.5, OU 12491; 10, A. effnensis pygidium, dorsal view, ×2.9, OU 12492]()
![Trilobites common in the bioherm and biostromal biofacies. All specimens housed at the Sam Noble Oklahoma Museum of Natural History (OU). A, D) Illaenus sp., cranidium, OU 13972 and pygidium, OU 13975. B) Scotoharpes sp., cranidium, OU 13973. C) Sphaerexochus sp. 1, cranidium, OU 13974. E) Acanthoparypha sp., cranidium, OU 13976. F) Sphaerexochus sp. 2, cranidium, OU 13977. G, J) Thaleops cf. T. fieldi (Raymond, 1925), cranidium, OU 13978, and pygidium, OU 13981. H) Probolichas sp., median glabella, OU 13979. I) Bumastoides sp. nov. (Carlucci et al., 2012), enrolled individual, OU 13980. K, N) Amphilichas effnensis (Carlucci et al., 2010), holotype cranidium, OU 12493, and pygidium, OU 12492. L–M) “Stenopareia” (see Taxonomic Notes, p. 24 herein) sp., pygidium, OU 13982 and cranidium, OU 13983. Thin scale bars = 5 mm, thick scale bars = 2 mm.]()
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Amphilichas effnensis
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Figure 11. Amphilichas effnensis ; all are from the Effna Formation (Upper...
in Tetralichine Trilobites from the Upper Ordovician of Oklahoma and Virginia and Phylogenetic Systematics of the Tetralichini
> Journal of Paleontology
Published: 01 November 2010
Figure 11. Amphilichas effnensis ; all are from the Effna Formation (Upper Ordovician) of Virginia. 1–3 , A. effnensis , holotype cranidium, dorsal, lateral, anterior views, ×2.5, OU 12493; 4–6 , A. effnensis , cranidium, dorsal, lateral, anterior views, ×4, OU 12494
Journal Article
Tetralichine Trilobites from the Upper Ordovician of Oklahoma and Virginia and Phylogenetic Systematics of the Tetralichini
Journal: Journal of Paleontology
Publisher: Paleontological Society
Published: 01 November 2010
Journal of Paleontology (2010) 84 (6): 1099–1120.
...Figure 11. Amphilichas effnensis ; all are from the Effna Formation (Upper Ordovician) of Virginia. 1–3 , A. effnensis , holotype cranidium, dorsal, lateral, anterior views, ×2.5, OU 12493; 4–6 , A. effnensis , cranidium, dorsal, lateral, anterior views, ×4, OU 12494 ...
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Image
Figure 10. Amphilichas Raymond, 1905 ; 1–4 , 7–8 are from the Bromide ...
in Tetralichine Trilobites from the Upper Ordovician of Oklahoma and Virginia and Phylogenetic Systematics of the Tetralichini
> Journal of Paleontology
Published: 01 November 2010
, lateral views, ×2, OU 5203; 4 , A. subpunctatus pygidium, dorsal view, ×2, OU 12486; 5 , Amphilichas effnensis , cranidium, dorsal view, ×4, OU 12487; 6 . A. effnensis cranidium, dorsal view, ×3, OU 12488; 7 , A. subpunctatus hypostome, dorsal view, ×3, OU 12489; 8 , A. subpunctatus
Image
Trilobites common in the bioherm and biostromal biofacies. All specimens ho...
in TRILOBITE BIOFACIES ALONG AN ORDOVICIAN (SANDBIAN) CARBONATE BUILDUP TO BASIN GRADIENT, SOUTHWESTERN VIRGINIA
> PALAIOS
Published: 01 January 2012
, OU 13980. K, N) Amphilichas effnensis ( Carlucci et al., 2010 ), holotype cranidium, OU 12493, and pygidium, OU 12492. L–M) “Stenopareia” (see Taxonomic Notes, p. 24 herein) sp., pygidium, OU 13982 and cranidium, OU 13983. Thin scale bars = 5 mm, thick scale bars = 2 mm.
Journal Article
TRILOBITE BIOFACIES ALONG AN ORDOVICIAN (SANDBIAN) CARBONATE BUILDUP TO BASIN GRADIENT, SOUTHWESTERN VIRGINIA
Journal: PALAIOS
Publisher: SEPM Society for Sedimentary Geology
Published: 01 January 2012
PALAIOS (2012) 27 (1): 19–34.
..., OU 13980. K, N) Amphilichas effnensis ( Carlucci et al., 2010 ), holotype cranidium, OU 12493, and pygidium, OU 12492. L–M) “Stenopareia” (see Taxonomic Notes, p. 24 herein) sp., pygidium, OU 13982 and cranidium, OU 13983. Thin scale bars = 5 mm, thick scale bars = 2 mm. ...
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