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367 results for “crinoid”
FIGURE 2 in Zevinaella — a new barnacle genus (Scalpellomorpha: Arcoscalpellinae) associated with crinoids (Echinodermata) from the Caribbean
FIGURE 2. Zevinaella volentis gen. et sp. nov. Holotype: a—right lateral view, b—left lateral view, c—rostral view, dcarinal view. Scale bar 10 mm.
FIGURE 5 in Zevinaella — a new barnacle genus (Scalpellomorpha: Arcoscalpellinae) associated with crinoids (Echinodermata) from the Caribbean
FIGURE 5. Zevinaella volentis gen. et sp. nov. Holotype, mouth parts and appendages: a—labrum, b—labrum palp, cmandible, d—maxilla I, e—maxilla II, f—cirrus I, g—median article of cirrus VI. Scale bars: a, b, d, e, f—0.3 mm; c—0.2 mm, g—0.1 mm.
FIGURE 9 in Zevinaella — a new barnacle genus (Scalpellomorpha: Arcoscalpellinae) associated with crinoids (Echinodermata) from the Caribbean
FIGURE 9. Changing of capitular armament in scalpellomorph species from Calantica spinosa to Zevinaella sp. a—Calantica spinosa (from Foster, 1978): i—form with spicular lateral plates, ii - with triangular lateral plates; b—Calantica studeri (from Foster, 1978); c—Calantica siemensi (from Young (2003), modified); d—Trianguloscalpellum balanoides (Hoek, 1883); e— Trianguloscalpellum pentacrinarum, L2 reduced; f—Zevinaella sp., L2 lost.
FIGURE 7 in Zevinaella — a new barnacle genus (Scalpellomorpha: Arcoscalpellinae) associated with crinoids (Echinodermata) from the Caribbean
FIGURE 7. Trianguloscalpellum pentacrinarum (Pilsbry, 1907). Holotype: a—right lateral view, b—left lateral view, cpeduncule attached to a cirrus of Neocrinus decorus (Thomson, 1864). Scale bar 5 mm. L2 = lower latus, inframedian latus or second latus.
FIGURE 4 in Zevinaella — a new barnacle genus (Scalpellomorpha: Arcoscalpellinae) associated with crinoids (Echinodermata) from the Caribbean
FIGURE 4. Zevinaella volentis gen. et sp. nov. Supplementary material, MCZ USA CRI 301: a—right lateral view, b—left lateral view, c—carinal view. Scale bar 5 mm. Supplementary material, MCZ USA CRI 303: d—showing position on a cirrus of S. spinifera. Note that the scalpellids settled above the bearing spines distal part of a crinoid cirrus. Scale bar 10 mm.
FIGURE 1 in Zevinaella — a new barnacle genus (Scalpellomorpha: Arcoscalpellinae) associated with crinoids (Echinodermata) from the Caribbean
FIGURE 1. Zevinaella rodstromi (Boon, 1927). Holotype: a—right lateral view, b—left lateral view, c—rostral view, dcarinal view; e—fragment of Stylometra spinifera (Carpenter, 1881). Scale bar 5 mm. C = carina; CL = carinolatus; L1 = latus, upper latus or first latus; R = rostrum; RL = rostrolatus; S = scutum & T = tergum; P = peduncle.
FIGURE 8 in Zevinaella — a new barnacle genus (Scalpellomorpha: Arcoscalpellinae) associated with crinoids (Echinodermata) from the Caribbean
FIGURE 8. Trianguloscalpellum pentacrinarum (Pilsbry, 1907). Supplementary material, NHM UK 1884.6.20.5, dissected to reveal the inside surface of plates: a—right lateral view, b—left lateral view, c—rostral view, d—carinal view. Zevinaella volentis gen. et sp. nov. Holotype: e—the inside surface of the capitulum, soft body parts removed. Scale bar 5 mm. R = rostrum.
FIGURE 3 in Zevinaella — a new barnacle genus (Scalpellomorpha: Arcoscalpellinae) associated with crinoids (Echinodermata) from the Caribbean
FIGURE 3. Zevinaella volentis gen. et sp. nov. Paratype: a—right lateral view, b—left lateral view, c—rostral view, dcarinal view. Scale bar 10 mm.
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 3. Metacrimenes fenestra n. gen., n in A new genus and new species of palaemonid shrimp (Decapoda: Caridea), associated with the deep-sea crinoid Metacrinus rotundus (Echinodermata: Isocrinidae), from Suruga Bay, Japan
FIGURE 3. Metacrimenes fenestra n. gen., n. sp., holotype, ovigerous female (cl 3.2 mm), CBM-ZC 17530; A, anterior part of carapace and cephalic appendages, lateral view; B, same, dorsal view [marginal setae omitted on right side]; C, telson, dorsal view; D, close up of posterior part of telson, dorsal view; E, lateral flagellum of left antennule, dorsolateral view; F, left antenna, ventral view (setae omitted); G, left uropod, dorsal view (marginal setae omitted).
FIGURE 7. Host crinoid Metacrinus rotundus Carpenter, 1885 in A new genus and new species of palaemonid shrimp (Decapoda: Caridea), associated with the deep-sea crinoid Metacrinus rotundus (Echinodermata: Isocrinidae), from Suruga Bay, Japan
FIGURE 7. Host crinoid Metacrinus rotundus Carpenter, 1885 in situ. A, entire animal on the muddy bottom; B, holotype of Metacrimenes fenestra n. gen., n. sp. clinging to the arm of M. rotundus (blue arrow).
FIGURE 2. Metacrimenes fenestra n. gen., n in A new genus and new species of palaemonid shrimp (Decapoda: Caridea), associated with the deep-sea crinoid Metacrinus rotundus (Echinodermata: Isocrinidae), from Suruga Bay, Japan
FIGURE 2. Metacrimenes fenestra n. gen., n. sp., holotype, ovigerous female (cl 3.2 mm), CBM-ZC 17530; A, carapace and cephalic appendages, lateral view; B, pleon, telson and pleonal appendages, lateral view.
FIGURE 1. Metacrimenes fenestra n. gen., n in A new genus and new species of palaemonid shrimp (Decapoda: Caridea), associated with the deep-sea crinoid Metacrinus rotundus (Echinodermata: Isocrinidae), from Suruga Bay, Japan
FIGURE 1. Metacrimenes fenestra n. gen., n. sp., holotype, ovigerous female (cl 3.2 mm), CBM-ZC 17530, photographed shortly after capture in small aquarium, showing living colouration; A, habitus, lateral view; B, habitus, dorsal view.
FIGURE 6. Metacrimenes fenestra n. gen., n in A new genus and new species of palaemonid shrimp (Decapoda: Caridea), associated with the deep-sea crinoid Metacrinus rotundus (Echinodermata: Isocrinidae), from Suruga Bay, Japan
FIGURE 6. Metacrimenes fenestra n. gen., n. sp., holotype, ovigerous female (cl 3.2 mm), CBM-ZC 17530; A, chela of left first pereopod, extensor view; B, chela and carpus of left first pereopod, mesial view; C, chela of left second pereopod, extensor view; D, dactylus and distal part of third pereopod, lateral view; E, dactylus and distal part of fifth pereopod, mesial view.
FIGURE 8 in A new genus and new species of palaemonid shrimp (Decapoda: Caridea), associated with the deep-sea crinoid Metacrinus rotundus (Echinodermata: Isocrinidae), from Suruga Bay, Japan
FIGURE 8. Maximum-likelihood (ML) tree constructed from concatenated data sets of the mitochondrial COI and 16S rRNA genes of Metacrimenes fenestra n. gen., n. sp. and closely allied palaemonid taxa (log likelihood -10197.759547). Numbers at nodes are bootstrap values; only values>80% are shown. The outgroup (Brachycarpus biunguiculatus) is omitted.
FIGURE 5. Metacrimenes fenestra n. gen., n in A new genus and new species of palaemonid shrimp (Decapoda: Caridea), associated with the deep-sea crinoid Metacrinus rotundus (Echinodermata: Isocrinidae), from Suruga Bay, Japan
FIGURE 5. Metacrimenes fenestra n. gen., n. sp., holotype, ovigerous female (cl 3.2 mm), CBM-ZC 17530; pereopods, lateral view. A, first pereopod; B, left second pereopod, C, right second pereopod; D, left third pereopod; E, left fourth pereopod; F, left fifth pereopod.
FIGURE 4. Metacrimenes fenestra n. gen., n in A new genus and new species of palaemonid shrimp (Decapoda: Caridea), associated with the deep-sea crinoid Metacrinus rotundus (Echinodermata: Isocrinidae), from Suruga Bay, Japan
FIGURE 4. Metacrimenes fenestra n. gen., n. sp., holotype, ovigerous female (cl 3.2 mm), CBM-ZC 17530; A, mandible, inner view; B, maxillule, outer view; C, maxilla, outer view; D, first maxilliped, outer view (endites broken during dissection); E, second maxilliped, outer view; F, third maxilliped, lateral view; G, same, coxa and antepenultimate article, ventral view.
Silurian crinoid fossil (Periechocrinus)
This is a limestone slab with beautifully preserved crinoid fossils (*Periechocrinus costatus*; BU2470, BIRUG 4899) on display in the Evolution of Life gallery of the Lapworth Museum of Geology. The crinoids come from the 428 million-year-old Much Wenlock Limestone Formation of Dudley, West Midlands, UK. In the Silurian the West Midlands was covered by warm shallow tropical seas, and a diverse ecosystem lived on and around coral and sponge reefs on the sea floor. Digitised using an Artec Spider 3D scanner by University of Birmingham Palaeobiology & Palaeoenvironments undergraduate student Luke Meade. Source: Objaverse 1.0 / Sketchfab
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