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17 results for “Holopodidae”
FIGURE 2 in A new species of the sessile crinoid Holopus d'Orbigny from the tropical western Atlantic, with comments on holopodid ecology (Echinodermata: Crinoidea: Holopodidae)
FIGURE 2. Holopus mikihe new species, holotype, USNM E41507. A, B, crown, about 33 mm high. A, note the 'mailed fist' appearance produced by the tuberculate, near-spinose proximal secundibrachials. B, reverse side of crown with C ray arm removed. C–F, C ray arm. C, F, lateral views; note pinnulation and profiles of large, aboral tubercles of proximal secundibrachs. D, aboral view. E, adoral view. Note that the specimen had an arm removed after it was examined by S.K.D. in 1989 (see Figure 1).
FIGURE 1 in A new species of the sessile crinoid Holopus d'Orbigny from the tropical western Atlantic, with comments on holopodid ecology (Echinodermata: Crinoidea: Holopodidae)
FIGURE 1. Holopus mikihe new species, holotype, USNM E41507, A-ray central (after Donovan, 1992, figure 1.2). Crown about 33 mm high.
FIGURE 3 in A new species of the sessile crinoid Holopus d'Orbigny from the tropical western Atlantic, with comments on holopodid ecology (Echinodermata: Crinoidea: Holopodidae)
FIGURE 3. Holopus from the tropical western Atlantic Ocean, Bahamas, in life position. A–D, F, Holopus rangii d'Orbigny, 1837. A, Johnson-Sea-Link I Dive 2276, 369m. Attached to overhang with arms opened for feeding, near-straight to curved. B, Johnson-Sea- Link I Dive 2051, 654–488m. Arms closed. C, Johnson-Sea-Link I Dive 2260, 619m. Arms open and forming an open 'cage'. D, Johnson-Sea-Link II Dive 1497, 591m. Arms widely open, with tips of some arms recurved. F, Johnson-Sea-Link I Dive 2276, 396 m. Oblique view into a feeding 'cage'. Note that some arms appear to be in contact with the substrate. E, Holopus mikihe new species, holotype, USNM E41507. Johnson-Sea-Link II Dive 1501, 758 m. Arms closed.
FIGURE 14 in New Eocene species of the crinoid genera Holopus and Cyathidium (Cyrtocrinida: Holopodidae) from north-eastern Italy
FIGURE 14. Lectotype of Holopus spileccense (modified from Schlüter 1878, pl. 3, figs. 11–12). A: adoral face, B: side view. Scale bars: 1 mm.
FIGURE 10 in New Eocene species of the crinoid genera Holopus and Cyathidium (Cyrtocrinida: Holopodidae) from north-eastern Italy
FIGURE 10. Variation in primibrachial ornamentation in Holopus fabianii sp. nov. from Chiampo (MGP-PD 33235). A–G, J: small specimens, A: paratype 8, B: paratype 9, C: paratype 10, D: paratype 11, E: paratype 12, F: paratype 13, G: paratype 14, J: paratype 15, H, I, K, L: large specimens, H: paratype 16, I: paratype 17, K: paratype 18, L: paratype 19. Scale bars: 1 mm.
FIGURE 9 in New Eocene species of the crinoid genera Holopus and Cyathidium (Cyrtocrinida: Holopodidae) from north-eastern Italy
FIGURE 9. Main quantitative characters of Holopodidae from the Eocene of north-eastern Italy. Cy: Cyathidium, Ho: Holopus, Ho.a.: juvenile of H. alidis (MNHN-IE-2014-2185). Straight lines: values of H/D and H/Wd. Other values in mm.
FIGURE 8. Holopodid aboral cups from Chiampo. A–C in New Eocene species of the crinoid genera Holopus and Cyathidium (Cyrtocrinida: Holopodidae) from north-eastern Italy
FIGURE 8. Holopodid aboral cups from Chiampo. A–C: Cyathidium chiampoensis sp. nov., A–B: holotype (MGP-PD 33229), A: oblique lateral view, B: opposite side, C: paratype 1 oblique lateral view (MGP-PD 33230), D–E: Cyathidium sp., D: lateral view MGP-PD 31469, E: lateral view MGP-PD 31471; F–G: holotype of Cyathidium gastaldii (MNHN-F-R68284), F: lateral adoral view, G: close-up of one arm articulation; H–J: aboral cups of Holopus fabianii sp. nov., H–I: holotype (MGP-PD 33232), H: oblique lateral view, I: opposite side; J: lateral aboral view of juvenile paratype 1 (MGP-PD 33233); p: interradial process, r: radial ridge. Scale bars: 1 mm.
FIGURE 5 in New Eocene species of the crinoid genera Holopus and Cyathidium (Cyrtocrinida: Holopodidae) from north-eastern Italy
FIGURE 5. Holopus alidis (MNHN-IE-2013-10012). A: distal view of IBrax; B: adoral distal view of IIBr1; C–H: keystone plate (IIBr4) ending proximal brachial series (e.g., see arrow head in Fig. 4D), C: outer proximal side view (proximal muscular synarthial articulation to IIBr3 at left), D: close-up of lateral crenulation, E: proximal muscular synarthry, F: proximal adoral view, G: oblique distal lateral view, H: distal muscular synarthry (articulation to distal brachial series) at opposite side of external surface; arrow: adoral process, arrow heads: location of external triangular surface shown in C; d: distal tip of the keystone plate; *: pinnule insertion. Scale bars: 0.5 mm in D, 1.0 mm in all others.
FIGURE 2 in New Eocene species of the crinoid genera Holopus and Cyathidium (Cyrtocrinida: Holopodidae) from north-eastern Italy
FIGURE 2. Simplified geologic map of the study area showing the Spilecco Hill site (1), close to Bolca (Verona province), and (2) Cengio dell'Orbo quarry (known also as "Boschetto di Chiampo" quarry), close to Chiampo (Vicenza province), Lessini Mountains of Veneto region, north-eastern Italy (modified from Mattioli et al. 2016).
FIGURE 4. Holopus alidis. A in New Eocene species of the crinoid genera Holopus and Cyathidium (Cyrtocrinida: Holopodidae) from north-eastern Italy
FIGURE 4. Holopus alidis. A: lateral distal view of paratype 4 without its arms (MNHN-IE-2013-10012); B: lateral distal view of a juvenile specimen with closed crown (MNHN-IE-2014-2185), C: close-up of IBrax of B; D: lateral oblique view of rolled arm attached to IBrax (arrow heads: keystone plates (IIBr4) of the two arms of the same ray) (MNHN-IE-2013-10012), E: pinnule socket on IIBr1 of Fig. 5B (adoral part at bottom with two small muscular pits); p: interradial process, r: thin radial ridge. Scale bars: 0.5 mm in E, 1.0 mm in all others.
FIGURE 13 in New Eocene species of the crinoid genera Holopus and Cyathidium (Cyrtocrinida: Holopodidae) from north-eastern Italy
FIGURE 13. Holopus spileccense, Spilecco, IBrax, variation in external ornamentation (MGP-PD 33244). A–B: small specimens, A: Br12, B: Br9, C–E: medium-sized specimens, C: Br14, D: Br13, E: largest specimen, Br1, F: Br16. Scale bars: 1 mm.
FIGURE 3 in New Eocene species of the crinoid genera Holopus and Cyathidium (Cyrtocrinida: Holopodidae) from north-eastern Italy
FIGURE 3. Simplified stratigraphic log of the Spilecco succession, Bolca (modified and redrawn from Medizza, 1980 and Papazzoni et al. 2014) and stratigraphic log of the Cengio dell'Orbo quarry, near Chiampo, Lessini Mountains of Veneto region, north-eastern Italy (modified and redrawn from Beccaro et al., 2001 and Beccaro, 2003). A) Chronostratigraphy, B) Calcareous nannofossil zones of Martini (1971). Legend. 1) pelagic limestones (Scaglia Rossa); 2) limestones, marly limestones and calcareous marls; 3) bedded volcaniclastic rocks; 4) clayey marls and volcanic clays; 5) hyaloclastites and volcanic rocks; 6) fossiliferous packstones/grainstones with planar stratification; 7) fossiliferous ruditic tuffites and hyaloclastites ("Lophoranina tuff" Auct.); 8) arenaceous limestones; 9) fossiliferous subnodular packstones/grainstones; 10) sponges; 11) crabs; 12) bivalves; 13) gastropods; 14) cephalopods; 15) crinoids; 16) echinoids; 17) brachiopods; 18) corals; 19) bryozoans; 20) shark teeth; 21) larger foraminifera; 22) calcareous algae; 23) bioturbations; 24) hardgrounds. Cret.=Cretaceous; Sant.=Santonian; Maast.=Maastrichtian; Thanet.=Thanetian.
FIGURE 12. Holopus spileccense, Spilecco. A–B in New Eocene species of the crinoid genera Holopus and Cyathidium (Cyrtocrinida: Holopodidae) from north-eastern Italy
FIGURE 12. Holopus spileccense, Spilecco. A–B: secundibrachials, A: external surface (MGP-PD 33247 Br8), B: distal facet (MGP-PD 33247 Br4), C: non-axillary IBr, external surface (MGP-PD 33245 Br7), D–G: aboral cups (MGP-PD 33242), D: adoral face (A7), E–F: A6, E: oblique lateral adoral view, F: oblique aboral view, G: lateral view, A2. Scale bars: 1 mm.
FIGURE 1 in New Eocene species of the crinoid genera Holopus and Cyathidium (Cyrtocrinida: Holopodidae) from north-eastern Italy
FIGURE 1. Characters measured in ossicles of fossil Holopodidae. A. Aboral cup, D: adoral diameter, Db: attachment disk diameter, Dcs: minimum diameter (constriction), H: maximum height, h: minimum height, ht: maximum height of adoral part, r: radial ridge, Wr: width of the radial articulation. B. Axillary primibrachial (IBrax), H: maximum height, Wd: maximum (distal) width, Wm: width of distal synarthry, Wp: minimum (proximal) width. C. Secundibrachial (IIBr) of proximal series, H: maximum lateral height, h: minimum lateral height, Wd: distal width, Wp: proximal width.
FIGURE 11 in New Eocene species of the crinoid genera Holopus and Cyathidium (Cyrtocrinida: Holopodidae) from north-eastern Italy
FIGURE 11. Secundibrachials of Holopus fabianii sp. nov. from Chiampo belonging to proximal series (MGP-PD 33236); A–E: IIBr from proximal part of proximal series, A: symmetrical muscular synarthry from a small specimen (paratype 20), B: asymmetrical muscular synarthry (paratype 21), C–D: proximal-most IIBr of a large specimen (paratype 22), C: oblique distal view, D: external face, E: IIBr of a bivium (paratype 23), F–H: keystone plate, distalmost IIBr of proximal series (paratype 24), F: oblique view of distal muscular synarthry, G: oblique view showing triangular external face and proximal muscular synarthry at left, H: proximal muscular synarthry. Scale bars: 1 mm.
FIGURE 7 in New Eocene species of the crinoid genera Holopus and Cyathidium (Cyrtocrinida: Holopodidae) from north-eastern Italy
FIGURE 7. Main quantitative characters of aboral cup and IBrax in fossil Holopodidae. S: Cyathidium holopus from Seymour Island. Straight lines: values of H/D and H/Wd. Other values in mm.
FIGURE 6 in New Eocene species of the crinoid genera Holopus and Cyathidium (Cyrtocrinida: Holopodidae) from north-eastern Italy
FIGURE 6. Holopus rangii (MNHN-IE-2013-11946). A–C: IBrax, A: oblique view of distal muscular synarthries, B: adoral view, C: close-up of fulcral ridge and outer ligament area (la) of proximal muscular synarthry, D–E: IIBr1, D: oblique distal view, E: close-up of pinnule socket, F: oblique aboral view of IIBr2 with proximal synarthrial facet; arrow: adoral interradial process, arrow head: pinnule socket. Scale bars: 1 mm.
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