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44 results for “Antiarchs”
FIG. 9 in Asterolepis alticristata n. sp. (Antiarchi) from the Upper Devonian (Frasnian) of Nunavut, Canada, and a report on the antiarch diversity of the Fram Formation
FIG. 9. — Antiarchi material from Devonian deposits of Nunavut. A, Asterolepidoidei sp. indet. from NV0207, NUFV 1280, nuchal plate in dermal view; B, Asterolepis sp. indet. from NV0205, NUFV 1287, anterior median dorsal plate in dermal view; C, D, Bothriolepis sp. indet. from NV2K17, NUFV 847, anterior median dorsal plate in dermal (C) and visceral (D) views; E-J, Bothriolepididae sp. indet. from NV2K15, E, F, NUFV 1296, right lateral plate in dermal (E) and visceral (F) views; G, H, NUFV 1295, premedian plate in dermal (G) and visceral (H) views; I, J, NUFV 1302, nuchal plate in dermal (I) and visceral (J) views; K, L, Bothriolepididae sp. indet. from NV2K05, NUFV 1305, articulated partial cephalic skeleton in dermal (K, photograph; K', labeled illustration) and visceral (L, photograph; L', labeled illustration) views; M, N, Bothriolepidoidei sp. indet. from NV9913, NUFV 1308, premedian plate in dermal (M) and visceral (N) views; O-Q, Asterolepidoidei sp. indet. from NV9917, NUFV 1307, nuchal plate in dermal (O), visceral (P), and caudal (Q) views. Abbreviations: cpl, central pit-line groove; ifc1, principal section of infraorbital pit-line groove; L, lateral plate; Nu, nuchal plate; ood, otic-occipital depression; Pm, premedian plate; Pn, paranuchal plate; po.r, preorbital recess; Pp, postpineal plate. Scale bars: 1 cm.
FIG. 6 in Asterolepis alticristata n. sp. (Antiarchi) from the Upper Devonian (Frasnian) of Nunavut, Canada, and a report on the antiarch diversity of the Fram Formation
FIG. 6. — Asterolepis cf. radiata: A, B, NUFV 797, anterior median dorsal plate in dermal (A) and visceral (B, photograph; B', labeled illustration) views; C, D, NUFV 825, partial posterior median dorsal plate in dermal (C) and visceral (D, photograph; D', labeled illustration) views; E, NUFV 863, mixilateral in dermal view. Abbreviations: cd.ADL, area overlapped by the anterior dorsolateral plate; cd.AMD, area overlapped by the anterior median dorsal plate; cd.PMD, area overlapped by the posterior median dorsal plate; cv.ADL, area overlapping the anterior dorsolateral plate; cv.Mxl, area overlapping the mixilateral plate; lc, lateral corner; op.r, oblique posterolateral ridge; ps.d, parasagittal depressions; r.a, rough area; ta, tergal angle; v.p, visceral pit. Scale bar: 2 cm.
FIG. 5. — Asterolepis alticristata n in Asterolepis alticristata n. sp. (Antiarchi) from the Upper Devonian (Frasnian) of Nunavut, Canada, and a report on the antiarch diversity of the Fram Formation
FIG. 5. — Asterolepis alticristata n. sp.: A-C, NUFV 892, left side of articulated partial thoracic skeleton in visceral (A, photograph; A', labeled illustration), left lateral (B, photograph; B', labeled illustration), and cranial (C, photograph; C', labeled illustration) views; D, NUFV 895, right mixilateral plate in dermal view. Abbreviations: ADL, anterior dorsolateral plate; AVL, anterior ventrolateral; c1, central 1 plate; cd, area overlapped by ventral thoracic plates; cd.AMD, area overlapped by the anterior median dorsal plate; cr.d, crescent-shaped depression; cv.Mxl, area overlapping the mixilateral plate; dlr, dorsolateral ridge; f.ax, foramen axillaris; lcg, main lateral line groove; MV, median ventral plate; pr.b, processus brachialis; pr.o, processus obstans. Scale bar: 5 cm.
FIG. 7. — A-M in Asterolepis alticristata n. sp. (Antiarchi) from the Upper Devonian (Frasnian) of Nunavut, Canada, and a report on the antiarch diversity of the Fram Formation
FIG. 7. — A-M, Asterolepidoidei sp. indet. from NV2K17, A, B, NUFV 831, articulated partial cephalic skeleton in dermal (A, photograph; A', labeled illustration) and visceral (B, photograph; B', labeled illustration) views; C, D, NUFV 857, premedian plate in dermal (C) and visceral (D) views; E, F, NUFV 1267, premedian plate in dermal (E) and visceral (F) views; G-I, NUFV 880, nuchal plate in dermal (G), visceral (H), and caudal (I) views; J-L, NUFV 1252, nuchal plate in dermal (J), visceral (K), and caudal (L) views; M, NUFV 808, lateral plate in dermal view; N, cf. Asterolepis sp. indet. from NV2K17, NUFV 852, mixilateral plate in dermal view. Abbreviations: cpl, central pit-line line groove; ifc1, principal section of infraorbital pit-line groove; L, lateral plate; nm, obtected area; Nu, nuchal plate; Pn, paranuchal plate; Pp, postpineal plate. Scale bar: 2 cm.
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