Find research datasets worth reusing

FIG. 1. — A 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. 1. — A, Map of Ellesmere Island; B, map of southwestern Ellesmere Island (rectangular inset of A) showing the locations of the field sites that have produced antiarch material; C, stratigraphy of the Okse Bay Group; D, stratigraphy of the Fram Formation type section.

FIG. 3. — 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. 3. — Asterolepis alticristata n. sp.: A-C, NUFV 1265, nuchal plate in dermal (A, photograph; A', labeled illustration), visceral (B, photograph; B', labeled illustration), and caudal (C) views; D-F, NUFV 813, premedian plate in dermal (D), visceral (E), and caudal (F) views; G-I, NUFV 812, premedian plate in dermal (G), visceral (H), and caudal (I) views. Abbreviations: cpl, central pit-line line groove; cv.L, area overlapping the lateral plate; cv.Pn, area overlapping the paranuchal plate; d.end, endolymphatic duct; ifc1, principal section of infraorbital pit-line groove; ml.p, midline process; mo.c, median occipital crista; nm, obtected area; pr.p, prerostral process; ps.f, parasagittal foramina; sop, supraoccipital pit; sot, supraotic thickening. Scale bar: 2 cm.

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.

Fig. 14 in Frasnian gastropod synecology and bio-events in the Dyminy reef complex of the Holy Cross Mountains, Poland

Fig. 14. Reef limestones containing gastropod fauna from early and middle Frasnian of Kowala. A. Stromatoporoid−coral packestone−floatstone with massive stromatoporoids (ms), branched rugosans (br), and large thick−shell gastropods Westerna subcostata (Schlotheim, 1820) comb. nov. (W), set A2, GIUS 4−1349/Ko−71. B. Nest concentrations of Kowalatrochus sanctacrucensis gen. et sp. nov. shells in wackstone−packestone, west wall of the quarry, set A2. C. Alveolites (Al) bindstone with brachiopods (b), crinoids (cr), and gastropods (g), set C, GIUS 4−1509/Ko−80. Scale bars 1cm.

Fig. 17 in Frasnian gastropod synecology and bio-events in the Dyminy reef complex of the Holy Cross Mountains, Poland

Fig. 17. Reconstructions of macrobenthic assemblages of the Frasnian Dyminy reef complex. A. Early and middle Frasnian environments of the Southern + Kielce Region (Kowala; after Racki 1993a). B1. Middle and late Frasnian environments of the Northern Kielce Region (Grabina). B2. Habitat of small gastropods among branches of Stachyodes–Renalcis buildups. C. Late Frasnian environments of the Central Kielce Region (Panek); a, Amphipora; s, Stachyodes; ms, massive stromatoporoids; al, Alveolites; sy, syringoporids; bt, branched tabulates; rugosans: mr, massive, br, branched, sr, singular; sp, sponges; rc, receptaculids; b, brachiopods; rh, rhynchonellids; gastropods: St, Straparollus; W, Westerna; O,Orecopia; L, Loxoplocus; g, other gastropods; p, bivalves; M, Megalodon; n, nautiloids; t, trilobites; os, ostracods; cr, crinoids; e, echinoids; f, fishes; R, Renalcis; S–R, Stachyodes–Renalcis buildups; mm, microbial mats.

Fig.9 in Frasnian gastropod synecology and bio-events in the Dyminy reef complex of the Holy Cross Mountains, Poland

Fig.9. Orecopia kadzielniae (Gürich,1896)comb.nov.in Kowalatrochus sanctacrucensis associationfromlowerandupperSitkówkaBeds(earlyandmiddle Frasnian). A, B. Apertural and apical view of internal mould with fragmentary preserved shell from the original Gürich's collection, Kadzielnia, set A, holotype MGUWr.1939.s. C. Axial section with visible funicles on umbilical wall, GIUS 4−1284/Gr−181. D, E. Apertural and basal view of shell with well preserved basal ornamentation, GIUS 4−1232/Ko−19. F, G. Apertural and apical view of shell with well preserved growth lines, GIUS 4−1041/Gr−173. H. Axial section with poorly preserved shell, GIUS 4−1045/Gr−177/1. I. Apertural view with fragmentary preserved shell, GIUS 4−1191/Gr−179. A–C, F–I. Grabina, set A; natural size. D, E. Kowala, set A2, × 2.

Fig. 12 in Frasnian gastropod synecology and bio-events in the Dyminy reef complex of the Holy Cross Mountains, Poland

Fig. 12. Distribution of translation (H/W) and of apertural shape (Ha/Wa) indexes of Grabinopsis guerichi gen. et sp. nov. from the middle Frasnian of the upper Sitkówka Beds.

Fig. 6 in Frasnian gastropod synecology and bio-events in the Dyminy reef complex of the Holy Cross Mountains, Poland

Fig. 6. Loxoplocus (Donaldiella) karczewskii sp. nov. from late Frasnian Detrital Beds, Panek, set B3. A, B. Fragments of spire with well preserved ornamentation. C–E. Spires with visible septation and unpreserved ornamentation. A. Holotype, GIUS 4−1293/Pan−21. B. GIUS 4−1287/Pan−15. C. GIUS 4−1288/Pan−16. D. GIUS 4−1292/Pan−20. E. GIUS 4−1301/Pan−29. A–C, E. × 2. D. × 1.7.

Fig. 16 in Frasnian gastropod synecology and bio-events in the Dyminy reef complex of the Holy Cross Mountains, Poland

Fig. 16. Middle and late Frasnian limestones of the upper Sitkówka Beds and of the Detrital Beds from Grabina. A. Stromatoporoid−coral floatstone with amphiporoids (a) and the large gastropod Orecopia kadzielniae (Gürich, 1896) comb. nov. (O). Geopetal structure in the last whorl of shell and septation of the spire are visible, GIUS 4−1510/Gr−182, set A. B. Stachyodes (S)–Renalcis (R) bafflestone from a giant colony, set B, GIUS 4−1511/Gr−183. C. Coral rudstone with massive (mr) and branched (br) rugosans, branched tabulates (bt), brachiopods (b), and gastropods (g), set C, GIUS 4−1512/Gr−184. Scale bars 1 cm.

Fig.1 in Frasnian gastropod synecology and bio-events in the Dyminy reef complex of the Holy Cross Mountains, Poland

Fig.1.LocationofstudiedsitesinthewesternpartoftheHolyCrossMountainsagainstthebackgroundofearlyFrasnianfaciesdistribution(afterRacki1993b).

Fig. 15 in Frasnian gastropod synecology and bio-events in the Dyminy reef complex of the Holy Cross Mountains, Poland

Fig. 15. Late Frasnian limestones of the Detrital−Stromatoporoid Beds at Panek. A. Lagoonal wackestone with amphiporoids (a) and Loxoplocus (Donaldiella) karczewskii sp. nov. (L) with septation of spire, set B3, GIUS 4−1515/Pan−85. B. Reefal packstone−rudstone with the bivalve Megalodon sp. (M) and the gastropod Westerna subcostata (Schlotheim, 1820) comb. nov. (W), set B2. C. Oncoidal packstone with the thick−shell gastropod Westerna subcostata (Schlotheim, 1820) comb. nov., as oncoid nodule, and other unidentified gastropods (g), set B2, GIUS 4−1514/Pan−84. Scale bars 1 cm.

Fig. 2. A, B, E, G, H in Trilobites from the latest Frasnian Kellwasser Crisis in North Africa (Mrirt, central Moroccan Meseta)

Fig. 2. A, B, E, G, H. Gondwanaspis mrirtensis gen. et sp. nov. from section "2", upper trilobite association. A, B, G. Holotype, cephalon with damaged right cheek, UM2−RF 170, partially external mould, in dorsal view (A), × 9.2; in frontal view (B) showing frontal and left antero−lateral borders and eye elevation, × 8.3; lateral view (G), × 9.5. E. Cephalon with incomplete left cheek, UM2−RF 171, dorsal view, latex cast of external mould, × 8.1. H. Cephalon with incomplete left cheek, UM2−RF 172, dorsal view, external mould, × 11.1. C, D, F, I, J. Palpebralia brecciae Richter and Richter, 1927. C, F. Cranidium from section "2", upper trilobite association, UM2−RF 179, external mould, in dorsal view (C), × 10; in lateral view (F), × 9.6. D. Librigena +

Fig. 1. A in Trilobites from the latest Frasnian Kellwasser Crisis in North Africa (Mrirt, central Moroccan Meseta)

Fig. 1. A. Devonian outcrops in Morocco with location of the Mrirt area in the central Meseta east of Rabat. B. Measured section "1" showing the Lower (LKW) and Upper (UKW) Kellwasser horizons and the intervening limestone beds. The levels of the lower and upper trilobite associations are marked with a star. C. Location of the studied sections "1" and "2" at Bou Ounabdou, 4 km to the SE of Mrirt township (after Becker and House 1999 and Walliser et al. 1999). Section "1" is the same as Bou Ounabdou, section II of Lasreq (1992).

Fig. 3. A–I in Trilobites from the latest Frasnian Kellwasser Crisis in North Africa (Mrirt, central Moroccan Meseta)

Fig. 3. A–I. Acuticryphops acuticeps (Kayser, 1889). A, H, I. Cephalon from section "2", upper trilobite association, UM2−RF 220, partially external mould, in dorsal view (A), × 6.9; in lateral view (H), eye lobe with more than 6 lenses, × 6.5; in frontal view (I), slightly tilted backward showing vincular furrow and ventral doublure, × 7.1. B, C. Cephalon from section "1", upper trilobite association, UM2−RF 221, external mould; in lateral view (B), eye lobe with 4 lenses, × 7.8; in dorsal view (C), × 8.2. D–F. Pygidium from section "2", upper trilobite association, UM2−RF 222, external mould; lateral view (D), × 14.5; in posterior view (E), × 10.7; in dorsal view (F), × 12.2. J–K. Otarion stigmatophthalmus (Richter, 1914), cranidium from section "2", upper trilobite association, UM2−RF 248, internal mould in dorsal view (J), × 14.1; in lateral view (K), × 14.8. L–Q. Pteroparia ziegleri maroccanica subsp. nov. from section "1", lower +