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63 results for “Ophioderma”
Fig. 12 in Delimitation of Ophioderma teres (Lyman, 1860) and Ophioderma unicolor H.L. Clark, 1940 stat. nov. (Echinodermata: Ophiuroidea), including the description of two new species
Fig. 12. Photographs of the species in situ. A. Ophioderma teres (Lyman, 1860) (Bajo Rojo, Costa Rica) (photograph: Steven Lara-Angulo). B. Ophioderma aija sp. nov. (Estacahuite, Mexico) (photograph: Francisco Benítez-Villalobos). C. Ophioderma bichi sp. nov. (Puerto Peñasco, Mexico) (photograph: Paloma Valdivia).
FIGURE 3 in A new, first fossil species of Ophioderma MHller and Troschel, 1842 (Echinodermata: Ophiuroidea) (Late Miocene, Argentina)
FIGURE 3. Present and Miocene geographic distribution of Ophioderma in the Americas. According to Martínez and del Río (2002) in the Miocene the influence of the proto Brazilian Current (Br) reached the present Península Valdés area, where now the Malvinas (Falkland Current) is operating..
FIGURE 2 in A new, first fossil species of Ophioderma MHller and Troschel, 1842 (Echinodermata: Ophiuroidea) (Late Miocene, Argentina)
FIGURE 2. Stratigraphic section at Estancia San Lorenzo. Location of the specimens of Ophioderma bonaudoae n.sp. indicated by the star.
FIGURE 1 in A new, first fossil species of Ophioderma MHller and Troschel, 1842 (Echinodermata: Ophiuroidea) (Late Miocene, Argentina)
FIGURE 1. Geographic location (star) where the specimens of Ophioderma bonaudoae n.sp. were collected.
Figure 5 in Overlooked for over a century: Ophioderma occultum sp. nov. (Echinodermata), a new species of brittle star from the Eastern Pacific
Figure 5. Maximum likelihood tree of the species analysed in this study. (a) COI; (b) 16S. Values at branches indicate bootstrap values (maximum likelihood/neighbour-joining); asterisks indicate specimens of Ophioderma occultum sp. nov. previously identified as Ophioderma panamense. Sequences obtained in this study are indicated in bold. See the Supplemental material for more information.
Figure 4 in Overlooked for over a century: Ophioderma occultum sp. nov. (Echinodermata), a new species of brittle star from the Eastern Pacific
Figure 4. Some morphological characters of Eastern Pacific Ophioderma that differ from those of Ophioderma occultum sp. nov. Ophioderma hendleri (holotype: ICML-UNAM 18315, DD = 14.8 mm): (a) close-up of a jaw; (b) dorsal arm. Ophioderma panamense (holotype: NHMD-107679, DD = 21.9 mm): (c) portion of dorsal disc and arm. Ophioderma pentacanthum (paratype: MCZ OPH-4519,
Figure 3 in Overlooked for over a century: Ophioderma occultum sp. nov. (Echinodermata), a new species of brittle star from the Eastern Pacific
Figure 3. Morphological variations recorded in Ophioderma occultum sp. nov. (a) Disc with partially uncovered radial shields (arrowheads; CE-UAM 390, DD = 15.4 mm); (b) white-spotted oral shields (paratype: ICML-EMU 12868, DD = 19.9 mm); (c) white oral shields (CE-UAM 214, DD = 7.3 mm); (d) granules on the proximalmost DAPs (ICML-UNAM 11593, DD = 26.7 mm); (e) arm segment with three tentacle scales (arrowhead; paratype: ICML-UNAM 18430, DD = 17.2 mm); (f) abnormal arm spines (arrowheads; CE-UAM 679, DD = 16.3 mm); (g) brown-coloured specimen (CE-UAM 673, DD = 23.5 mm); (h–i) in vivo colouration (Photographs: M.A. Medina-López).
Figure 2 in Overlooked for over a century: Ophioderma occultum sp. nov. (Echinodermata), a new species of brittle star from the Eastern Pacific
Figure 2. Ophioderma occultum sp. nov., paratype (ICML-UNAM 18430, DD = 3.7 mm). (a) Dorsal disc; (b) ventral disc (insert: jaw with the partially uncovered oral shield); (c) close-up of a jaw; (d–f) dorsal arm (proximalmost, median, distalmost); (g–i) ventral arm (proximalmost, median, distalmost); (j) lateral arm plates and arm spines; (k) dorsal view. 2°AdShSp, secondary adoral shield spine; AdShSp, adoral shield spine; IPa, infradental papilla; LOPas, lateral oral papillae; LyOs, Lyman's ossicle; TPa, tooth papilla; vT, ventralmost tooth.
Figure 1 in Overlooked for over a century: Ophioderma occultum sp. nov. (Echinodermata), a new species of brittle star from the Eastern Pacific
Figure 1. Ophioderma occultum sp. nov., holotype (ICML-UNAM 18429, DD = 15.9 mm). (a) Dorsal disc; (b) ventral disc; (c) close-up of a jaw; (d–f) dorsal arm (proximalmost, median, distalmost); (g–i) ventral arm (proximalmost, median, distalmost); (j) lateral arm plates and arm spines; (k) dorsal view. 2° AdShSp, secondary adoral shield spine; AdShSp, adoral shield spine; IPa, infradental papilla; LOPas, lateral oral papillae; LyOs, Lyman's ossicle; TPa, tooth papilla; vT, ventralmost tooth.
Data from: Influence of the larval phase on connectivity: strong differences in the genetic structure of brooders and broadcasters in the Ophioderma longicauda species complex
Closely related species with divergent life-history traits are excellent models to infer the role of such traits in genetic diversity and connectivity. Ophioderma longicauda is a brittle star species complex composed of different genetic clusters, including brooders and broadcasters. These species diverged very recently and some of them are sympatric and ecologically syntopic, making them particularly suitable to study the consequences of their trait differences. At the scale of the geographic distribution of the broadcasters (Mediterranean Sea and north-eastern Atlantic), we sequenced the mitochondrial marker COI and genotyped an intron (i51) for 788 individuals. In addition, we sequenced 10 nuclear loci newly developed from transcriptome sequences, for six sympatric populations of brooders and broadcasters from Greece. At the large scale we found a high genetic structure within the brooders (COI: 0.07
FIGURE 5 in Potential cryptic speciation in Mediterranean populations of Ophioderma (Echinodermata: Ophiuroidea)
FIGURE 5. Colour variability in Mediterranean Ophioderma longicauda. A–C, dorsal, ventral and ovaries of a dark brown spm from Banyuls sur Mer (SMNH-102630), the oocytes are ochre with a green tinge; D, E, dark brown spm from Marseille (SMNH-38756), dorsal and ventral aspect, traces of red on the ventral side are no longer present after several years in ethanol; F, G, brown spm from Cyprus (SMNH-99790); H, I, vividly green spm from Lebanon (SMNH-99766); J, K, olive green and brown spm from Cyprus (SMNH-99790); L, M, brooding spm from Cyprus (SMNH-80284) with brown dorsal side and green and brown ventral side; N–P, brooder (SMNH-80284) with brown and olive dorsal pattern and green and brown ventral side; N, opened ventral interradius filled with juveniles; P, dorsal disk removed, showing the ovaries filled with juveniles (in total 1,048). SMNH, Swedish Museum of Natural History catalogue numbers; spm, specimen.
FIGURE 2 in Potential cryptic speciation in Mediterranean populations of Ophioderma (Echinodermata: Ophiuroidea)
FIGURE 2. Examples of morphological variation in Ophioderma longicauda at a size of 15 mm disk diameter. Note differences in the shape (width:length) of oral shields and in the number of arm spines and oral papillae. Ventral disk aspect: (A) brown spm from Marseille; (B) red-brown spm from Cyprus; (C) green male spm from Cyprus; (D) brooding spm from Cyprus, arrow points to juvenile in bursal slit. Arm dorsally: (E) brown spm from Marseille; (F) red-brown spm from Cyprus; (G) green male from Cyprus; (H) brooding female from Cyprus. Arm laterally: (I) brown spm from Marseille; (J) red-brown spm from Cyprus; (K) green male from Cyprus; (L) brooder from Cyprus. SEM images. AS, adoral shield, ASp, arm spine; DAP, dorsal arm plate; LAP, lateral arm plate; OP, oral plate; spm, specimen; TS, tentacle scale; VAP, ventral arm plate. Scale bars 1 mm.
FIGURE 1 in Potential cryptic speciation in Mediterranean populations of Ophioderma (Echinodermata: Ophiuroidea)
FIGURE 1. Map of the Mediterranean Sea with sampling localities of Ophioderma longicauda. Brooding specimens were found in the south-eastern Mediterranean Sea, off Tunisia, Lebanon and Cyprus (grey dots). In the northwestern parts and the northern Aegean, as well as Malta, only non-brooding O. longicauda were found (black dots). BAN, Banyuls-sur-Mer; Cr, Crete; CYP, Cyprus; GRE, Greece; Is, Israel; MAR, Marseille; LEB, Lebanon; Rh, Rhodes; Tu, Tunisia.
FIGURE 4 in Potential cryptic speciation in Mediterranean populations of Ophioderma (Echinodermata: Ophiuroidea)
FIGURE 4. Ratio of oral shield width:length (OSL:W) plotted against disk diameter (DD) in Mediterranean Ophioderma longicauda, based on locality and reproduction mode.
FIGURE 7 in Potential cryptic speciation in Mediterranean populations of Ophioderma (Echinodermata: Ophiuroidea)
FIGURE 7. Reconstruction of the COI phylogenetic relationships between haplotypes of Ophioderma longicauda using the Neighbour Joining (NJ) and maximum likelihood (ML) methods. Numbers near nodes are bootstrap values (from the NJ tree/from the ML reconstruction). Bold, underlayed haplotypes mark the green specimens and arrows indicate brooding specimens. All specimens from Cyprus are brooding females (SMNH-80284), GRE 1, 2, 5 (SMNH-80283) are of indeterminate sex, GRE 3, 4 (SMNH-80283) are females, LEB 4, 5 (SMNH-47650, 47647) are females, LEB 7 is indeterminate (SMNH-47647), LEB A, B (SMNH-70956), A is brooding, B is a male; other specimens were not sexed. Marseille specimens were from lot SMNH-102357 and Madeiran ones from SMNH-35615. CYP, Cyprus; GCA, Gran Canaria; GRE, Greece; LEB, Lebanon; MAD, Madeira; MAR, Marseille; PAL, La Palma; SMNH, Swedish Museum of Natural History.
FIGURE 6 in Potential cryptic speciation in Mediterranean populations of Ophioderma (Echinodermata: Ophiuroidea)
FIGURE 6. Brooding female of Ophioderma longicauda and SEM images of juveniles. Ventral disk aspect with juveniles visible in proximal bursal slits (A), close-up of juvenile escaping from bursal slit (B), SEM image of juvenile in bursal slit (C), dorsal aspect of juvenile (D), ventral aspect of juvenile (E), lateral arm of juvenile (F), ventral interradius of juvenile (G). AS, adoral shield; Asp, arm spine; ASS, adoral shield spine; LAP, lateral arm plate; TP, terminal plate. Arrows indicate juveniles in bursal slits. Scale bars (A, B), 1 mm, (C–G), 100 µm.
FIGURE 1 in Morphological distinction of the Ophioderma Müller & Troschel, 1840 species (Echinodermata: Ophiuroidea: Ophiacanthida: Ophiodermatidae) from the Algerian west coast
FIGURE 1. Geographical location of the sampling stations of the Ophioderma species. (Salamndre ●, Stidia-East □ and StidiaWest +).
FIGURE 2 in Morphological distinction of the Ophioderma Müller & Troschel, 1840 species (Echinodermata: Ophiuroidea: Ophiacanthida: Ophiodermatidae) from the Algerian west coast
FIGURE 2. Measurements taken from dorsal (A) and ventral (B) side of Ophioderma species. IW: Interraduis Width. AW: Arm Width. d1 and d2: large and small disc diameters. M: Madreporite. W: Width and L: Length of oral shield and madreporite. OS: Oral Shied. AdShL: Adoral Shield Length. GS: Genital Slit. VAP: Ventral Arm Plates. Small black narrow: white spots on VAP. Scale bare = 5 mm
FIGURE 7 in Morphological distinction of the Ophioderma Müller & Troschel, 1840 species (Echinodermata: Ophiuroidea: Ophiacanthida: Ophiodermatidae) from the Algerian west coast
FIGURE 7. Photomicrograph of Ophioderma female gonads. A: overview of brooding gonads. B: Embryo at the gastrula stage. C: ovary at mature stage. D: partially spawned stage. E: post-spawned stage. F: recovery stage. E: Embryo, IO: Immature Oocyte, MO: Mature Oocyte, OS: Outer Sac, IS: Inner Sac, L: Luman, R: Relic, SOv: Spent Ovary, NC: Nutritional Cells. Scale bar = 100 µm.
FIGURE 6 in Morphological distinction of the Ophioderma Müller & Troschel, 1840 species (Echinodermata: Ophiuroidea: Ophiacanthida: Ophiodermatidae) from the Algerian west coast
FIGURE 6. Covered (a), naked (b) and mixed (c) radial shield. CRS: Covered Radial Shield. NRS: Naked Radial Shield. Scale bare = 0.5 mm.
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