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15 results for “Ocenebra”
FIG. 14. — A in Quaternary and Recent shells of Ocenebra erinaceus (Linnaeus, 1758) and O. brevirobusta Houart, 2000 (Mollusca, Muricidae, Ocenebrinae): reflections on the intra- and interspecific variations
FIG. 14. — A, the two first axes of a PCA performed on the harmonics of Fourier for the ventral view; B, the same for the apical view; C, D, location of the the populations means in the canonical space corresponding to the amplitudes of the harmonics of Fourier for the apical view; C, the two first canonical axes CA1 versus CA2; D, canonical axes CA1 versus CA3; green triangle, Moroccan Atlantic; yellow triangle, Cap Rhir; green square, Oualidia (O. brevirobusta). Red group, Mediterranean forms (Ocenebra erinaceus (Linnaeus, 1758)); blue group, North Atlantic forms (O. erinaceus); green group, Moroccan Atlantic forms (O. brevirobusta Houart, 2000), black square (Ocinebrellus inornatus (Récluz, 1851)). Abbreviations: P, Pleistocene; Pl, Pliocene.
FIG. 15. — A in Quaternary and Recent shells of Ocenebra erinaceus (Linnaeus, 1758) and O. brevirobusta Houart, 2000 (Mollusca, Muricidae, Ocenebrinae): reflections on the intra- and interspecific variations
FIG. 15. — A, average Fourier power spectrum for the apical view, 99.95% of the power is described by the first nine harmonics, represented by the arrow; B, same for the ventral view, 99.95% of the power is described by the first 12 harmonics, represented by the arrow.
FIG. 11 in Quaternary and Recent shells of Ocenebra erinaceus (Linnaeus, 1758) and O. brevirobusta Houart, 2000 (Mollusca, Muricidae, Ocenebrinae): reflections on the intra- and interspecific variations
FIG. 11. — Majority rule consensus tree obtained by the comput- er program Winclada99 (Lenght: 100, CI: 0.48, RI: 0.67). Abbreviations: H, Holocene; Md, Middle Age; P, Pleistocene; Pl, Pliocene; R, Recent; s.f., subfossil; O., Ocenebra.
FIG. 10 in Quaternary and Recent shells of Ocenebra erinaceus (Linnaeus, 1758) and O. brevirobusta Houart, 2000 (Mollusca, Muricidae, Ocenebrinae): reflections on the intra- and interspecific variations
FIG. 10. — Strict consensus tree obtained by the computer programs Hennig86 (Lenght: 96, CI: 0.38, RI: 0.50) and Winclada99 (Lenght: 96, CI: 0.38, RI: 0.49). Abbreviations: Cl. 1-Cl. 6, number of the clades; in bold, the characters and in parenthesis, the character states; H, Holocene; Md, Middle Age; P, Pleistocene; Pl, Pliocene; R, Recent; s.f., subfossil; O., Ocenebra.
FIG. 8 in Quaternary and Recent shells of Ocenebra erinaceus (Linnaeus, 1758) and O. brevirobusta Houart, 2000 (Mollusca, Muricidae, Ocenebrinae): reflections on the intra- and interspecific variations
FIG. 8. — Spiral sculpture of recent Ocenebra erinaceus (Linnaeus, 1758) and O. brevirobusta Houart, 2000 (apertural view); A, B, O. erinaceus (Malaga, Mediterranean Sea, Spain) (MNHN, domaine de collection Botanique et Zoologie); C, D, O. brevirobusta (Casablanca, Atlantic, Morocco) (MNHN R11448 et R11449; Lecointre coll.). Abbreviations: see p. 267. Scale bars: A, C, 1 mm; B, D, 5 mm.
FIG. 9 in Quaternary and Recent shells of Ocenebra erinaceus (Linnaeus, 1758) and O. brevirobusta Houart, 2000 (Mollusca, Muricidae, Ocenebrinae): reflections on the intra- and interspecific variations
FIG. 9. — Spiral sculpture of Ocenebra erinaceus (Linnaeus, 1758) (apertural view); A, specimen from Asti (Pliocene, Italy) (MNHN R11447; Vibray coll.); B, specimen from Aigues-Mortes (Recent, Mediterranean Sea, France) (MNHN R63993; Merle coll.); C, specimen from Saint-Brieuc (English Channel, France) (MNHN R11445; Lhomme coll.); D, specimen from Oléron Island (Atlantic, France) (MNHN R11446; Lacour coll.). Abbreviations: see p. 267. Scale bar: 5 mm.
FIG. 7 in Quaternary and Recent shells of Ocenebra erinaceus (Linnaeus, 1758) and O. brevirobusta Houart, 2000 (Mollusca, Muricidae, Ocenebrinae): reflections on the intra- and interspecific variations
FIG. 7. — Simplistic representation of the ontogeny of the spiral cords of Ocenebra brevirobusta Houart, 2000 (population from Casablanca, Moroccan Atlantic). Abbreviations: adis, adapical secondary cord of the siphonal canal; ADP, adapical primary cord of the siphonal canal; ads, adapical secondary cord of the sutural ramp; IP, infrasutural primary cord; P1, shoulder cord; P2-P6, primary cords of the convex part of the whorl (w.); s2, s3, s6, secondary cords of the convex part of the whorl.
FIG. 13. — A in Quaternary and Recent shells of Ocenebra erinaceus (Linnaeus, 1758) and O. brevirobusta Houart, 2000 (Mollusca, Muricidae, Ocenebrinae): reflections on the intra- and interspecific variations
FIG. 13. — A, intra- and interpopulation analysis using the Procrustes analysis for five specimens of Ocenebra erinaceus (Linnaeus, 1758) from Malaga (red), from Quiberon (blue), and for five specimen from O. brevirobusta Houart, 2000 from Moroccan Atlantic (green); B, morphological comparisons using the Procrustes analysis for the Mediterranean populations of O. erinaceus (Recent: dark red; fossils: light red), the Atlantic Ocean populations of O. erinaceus (Recent: dark blue; fossils: light blue), O. brevirobusta (Recent: dark green; fossil: light green) and for Ocinebrellus inornatus (Récluz, 1851) (black). The populations from Cap Rhir and the Étang de Thau respectively are in yellow and brown colours.
FIG. 3 in Quaternary and Recent shells of Ocenebra erinaceus (Linnaeus, 1758) and O. brevirobusta Houart, 2000 (Mollusca, Muricidae, Ocenebrinae): reflections on the intra- and interspecific variations
FIG. 3. — Location of 14 landmarks on the ventral view of the Ocenebra Gray, 1847. The correspondence between the primary cords (P1 to P4) and the landmarks is given; photo of O. erinaceus (Linnaeus, 1758), V. Berrou.
FIG. 2 in Quaternary and Recent shells of Ocenebra erinaceus (Linnaeus, 1758) and O. brevirobusta Houart, 2000 (Mollusca, Muricidae, Ocenebrinae): reflections on the intra- and interspecific variations
FIG. 2. — Linear measures used for the biometric study of Ocenebra Gray, 1847. Abbreviations: BCS, distance between the base and the old siphonal canal; H, total height; HA, height of the aperture excluding the siphonal canal; HLW, height of the last whorl; HP1, height of the P1 cord spine; HS, height of the siphonal canal; TP1, thickness of P1; WA, width of the aperture; WS, width of the shoulder; photo of O. erinaceus (Linnaeus, 1758), courtesy of R. Houart.
FIG. 1. — A in Quaternary and Recent shells of Ocenebra erinaceus (Linnaeus, 1758) and O. brevirobusta Houart, 2000 (Mollusca, Muricidae, Ocenebrinae): reflections on the intra- and interspecific variations
FIG. 1. — A, geographic range of the genus Ocenebra Gray, 1847 in Europe after Houart (2001a) modified; B, geographic location of the studied samples; photos of Ocenebra, courtesy of R. Houart.
FIG. 12 in Quaternary and Recent shells of Ocenebra erinaceus (Linnaeus, 1758) and O. brevirobusta Houart, 2000 (Mollusca, Muricidae, Ocenebrinae): reflections on the intra- and interspecific variations
FIG. 12. — Favourite phylogenetic hypothesis.
FIG. 2. — Ocenebra brevirostra n in New species of Muricidae (Gastropoda) from the northeastern Atlantic and the Mediterranean Sea
FIG. 2. — Ocenebra brevirostra n. sp., Morocco, Essaouira, paratype MNHN, 24.6 mm.
FIG. 1. — Ocenebra brevirostra n in New species of Muricidae (Gastropoda) from the northeastern Atlantic and the Mediterranean Sea
FIG. 1. — Ocenebra brevirostra n. sp., Morocco, Essaouira, holotype MNHN, 38.1 mm.
FIG. 6 in Quaternary and Recent shells of Ocenebra erinaceus (Linnaeus, 1758) and O. brevirobusta Houart, 2000 (Mollusca, Muricidae, Ocenebrinae): reflections on the intra- and interspecific variations
FIG. 6. — Simplistic representation of the ontogeny of the spiral cords of Ocenebra erinaceus (Linnaeus, 1758) (population from Malaga, Spain). Abbreviations: ABP, abapical primary cord of the siphonal canal; abs, abapical secondary cord of the sutural ramp; adis, adapical secondary cord of the siphonal canal; ADP, adapical primary cord of the siphonal canal; ads, adapical secondary cord of the sutural ramp; IP, infrasutural primary cord; MP, median primary cords of the siphonal canal; ms, median secondary cord of the siphonal canal; P1, shoulder cord; P2-P6, primary cords of the convex part of the whorl (w.); s1-s6, secondary cords of the convex part of the whorl.
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