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576 results for “Asteroideae”
Fig. 5 in Three New Species of Dendrogaster (Crustacea: Ascothoracida) Infecting Goniasterid Sea-Stars (Echinodermata: Asteroidea) from Japan
Fig. 5. Dendrogaster tobasuii sp. nov., allotype male, total length ca. 6 mm, NSMT-Cr 26861, removed from the main branch of holotype female. A, right lateral view (arrowhead indicating point of breakage of isolated left posterior process); B, isolated left posterior process; C, main body, left lateral view (long setae of thoracic limbs and furca omitted); D, right antennule, medial view; E, left first thoracic limb (thoracopod 2), lateral view. Abbreviations: ab, abdominal segments; bs, basis; cg, claw guard; cl, terminal claw; cx, coxa; en, endopod; ex, exopod; fr, furcal rami; fs, fusion seam; I–IV, segment numbers; mx, second maxillae; sp, rudimentary proximal sensory process; th, thoracomeres.
Fig. 7 in Three New Species of Dendrogaster (Crustacea: Ascothoracida) Infecting Goniasterid Sea-Stars (Echinodermata: Asteroidea) from Japan
Fig. 7. Dendrogaster nagasakimaruae sp. nov., A–D, holotype female, mantle size 22.0 mm, NSMT-Cr 26878, removed from coelomic cavity of Nymphaster euryplax (R 60.0 mm, r 14.6 mm), East China Sea southeast of Danjo Islands, Nagasaki Prefecture (31°51.73′N, 128°29.13′E), 247–257 m depth. A, whole animal, dorsal view; B, linear scheme to indicate a pattern of mantle branching; C, left antennule, medial view; D, second maxillae, posterior view. E–F, allotype male, total length 4.5 mm, NSMT-Cr 26879, removed from the main branch of holotype female. E, whole animal, right lateral view; F, abdomen. Abbreviations: b1a, anterior primary branches; b2a, anterior secondary branches; b3a, anterior tertiary branches; b1p, posterior primary branches; b2p, posterior secondary branches; bl, basal lobe; cg, claw guard; cl, terminal claw; fr, furcal rami; fs, fusion seam; I–IV, segment numbers; mb, main branches; mp, middle piece; pp, posterior processes; sp, rudimentary proximal sensory process.
Fig. 4 in Three New Species of Dendrogaster (Crustacea: Ascothoracida) Infecting Goniasterid Sea-Stars (Echinodermata: Asteroidea) from Japan
Fig. 4. Dendrogaster tobasuii sp. nov., holotype female, mantle size 59.9 mm, NSMT-Cr 26860, removed from coelomic cavity of Mediaster arcuatus (unmeasured), Kumano-nada Sea off Owase, Mie Prefecture, Pacific coast of central Japan, about 300 m depth. A, whole animal, dorsal view; B, linear scheme to indicate a pattern of mantle branching; C, left antennule, medial view; D, fourth segment of right antennule, lateral view; E, second maxillae. Abbreviations: b1a, anterior primary branches; b2a, anterior secondary branches; b3a, anterior tertiary branches; b1p, posterior primary branches; cg, claw guard; cl, terminal claw; fs, fusion seam; I–IV, segment numbers; mb, main branches; mp, middle piece; sp, rudimentary proximal sensory process.
Fig. 3 in Three New Species of Dendrogaster (Crustacea: Ascothoracida) Infecting Goniasterid Sea-Stars (Echinodermata: Asteroidea) from Japan
Fig. 3. Dendrogaster komatsuae sp. nov., nauplius, carapace length 0.87 mm, from holotype female. A, whole animal, ventral view; B, left portion of body, ventral view. Abbreviations: a1, antennule; a2, antenna; md, mandible. Scale bar=0.3 mm.
Fig. 2 in Three New Species of Dendrogaster (Crustacea: Ascothoracida) Infecting Goniasterid Sea-Stars (Echinodermata: Asteroidea) from Japan
Fig. 2. Dendrogaster komatsuae sp. nov., holotype female, mantle size 46.3 mm, NSMT-Cr 26858, removed from coelomic cavity of Lithosoma japonica (R 50.0 mm, r 25.3 mm), TAMBL-EC10, Kumano-nada Sea off Owase, Mie Prefecture, Pacific coast of central Japan, about 300 m depth. A, whole animal, dorsal view; B, linear scheme to indicate a pattern of mantle branching; C, left anterior branches, unfurled; D, left antennule, medial view; E, third and fourth segments of right antennule (terminal claw missing), lateral view; F, second maxillae. Abbreviations: b1a, anterior primary branches; b2a, anterior secondary branches; bp, posterior branches; b1p, posterior primary branches; cg, claw guard; cl, terminal claw; eb, extra branch; fs, fusion seam; I–IV, segment numbers; mb, main branches; mp, middle piece; sp, rudimentary proximal sensory process; tb, terminal branch.
Fig. 7 in New articulated asteroids (Echinodermata, Asteroidea) and ophiuroids (Echinodermata, Ophiuroidea) from the Late Jurassic (Volgian / Tithonian) of central Spitsbergen
Fig. 7. Ophioculina hoybergia Rousseau & Thuy gen. et sp. nov., paratypes. A–B. Paratype PMO 218.001c. A. Nearly complete specimen (outlined) preserving five arms and the ventral side of the disc, on a concretion slab with an accumulation of specimens. B. Detail view of arm section. C. Paratype PMO 218.048. Articulated ventral disc preserving good details of the oral plates, the second oral tentacle pores and the rows of papillae bordering the genital slit. D–E. Paratype PMO 218.010b. D. Articulated specimen preserving the basal portion of five arms and showing details of the dorsal disc. E. Detail view of arm section. Abbreviations: aos = adoral shield; lap = lateral arm plate; os = oral shield; rs = radial shield; sart = spine articulation; tp = tentacle pore; vap = ventral arm plate; 2otp = second oral tentacle pore.
Fig. 4 in New articulated asteroids (Echinodermata, Asteroidea) and ophiuroids (Echinodermata, Ophiuroidea) from the Late Jurassic (Volgian / Tithonian) of central Spitsbergen
Fig. 4. Ophiogaleus sp. PMO 217.899a. A. Specimen preserving the ventral side of the disc area, two nearly complete arms and proximal area of a third arm. B. Detail view of the disc area. C. Drawing detail of the area shown in B. D. Detail view of a proximal section of arm. Abbreviations: abgp = abradial genital plate; adgp = adradial genital plate; ds = disc spine; lopa = lateral oral papillae; op = oral plate; sart = spine articulation; v = vertebra.
Fig. 6 in New articulated asteroids (Echinodermata, Asteroidea) and ophiuroids (Echinodermata, Ophiuroidea) from the Late Jurassic (Volgian / Tithonian) of central Spitsbergen
Fig. 6. Ophioculina hoybergia Rousseau & Thuy gen. et sp. nov., holotype PMO 217.930. A. Specimen preserving the ventral side of about half of the disc area and the proximal section of three arms. B. Drawing detail of the oral region, from D. C. Detail view of the base of an arm showing the arm comb. D. Detail view of the oral region. Abbreviations: abgp = abradial genital plate; adgp = adradial genital plate; aopa = apical oral papilla; as = arm spine; gpa = genital papilla; lap = lateral arm plate; lopa = lateral oral papilla; op = oral plate; os = oral shield; v = vertebra; 2opa = papilla of the second oral tentacle pore.
Fig. 2 in New articulated asteroids (Echinodermata, Asteroidea) and ophiuroids (Echinodermata, Ophiuroidea) from the Late Jurassic (Volgian / Tithonian) of central Spitsbergen
Fig. 2. Polarasterias janusensis Rousseau & Gale gen. et sp. nov. A–C. Holotype PMO 218.011a. A. Nearly complete specimen preserved in a cut-through fashion. B. Drawing detail from ambulacral groove showing ambulacrals, adambulacrals, adambulacral spines and scattered valves of forcipulate pedicellariae. C. Portion of arm illustrated in B, basal pieces of straight pedicellariae visible in cross section. D. Paratype PMO 217.982, oral region in actinal view. E. Paratype PMO 217.936, Arm tip showing terminal ossicle. F–G. Paratype PMO 218.069. F. Obliquely compressed radius showing adambulacrals, marginals, and columns of abactinal ossicles. G. Drawing detail from F. Abbreviations: abact = abactinal ossicle; adamb sp = adambulacral spine; adamb = adambulacral; amb = ambulacral; im = inferomarginal; ped bp = basal piece of pedicellariae; sm = superomarginal; sp = spine.
Fig. 5 in New articulated asteroids (Echinodermata, Asteroidea) and ophiuroids (Echinodermata, Ophiuroidea) from the Late Jurassic (Volgian / Tithonian) of central Spitsbergen
Fig. 5. Ophiogaleus sp. A–E. PMO 218.060, specimen preserving the ventral side of the disc area and the base of all five arms. The specimen has been split through a horizontal plane and is visible as part (A) and counterpart (B). Photographs in A and B by H.A. Nakrem. C. Drawing detail of the oral and interradial area. D. Detail view of proximal arm segments with articulated spines. E. Detail view of distal arm segment. F. PMO 218.053a, partly disarticulated arm portion composed of three median segments showing details of the ventral side of the arms. Abbreviations: abgp = abradial genital plate; adgp = adradial genital plate; as = arm spine; cs = arm in cross section; dp = dental plate; ds = disc spine; lap = lateral arm plate; op = oral plate; rs = radial shield; vap = ventral arm plate.
Fig. 1. A in New articulated asteroids (Echinodermata, Asteroidea) and ophiuroids (Echinodermata, Ophiuroidea) from the Late Jurassic (Volgian / Tithonian) of central Spitsbergen
Fig. 1. A. Simplified geological map of the study area in Sassenfjorden, central Spitsbergen, with location of the Janusfjellet (1), Konusdalen (2) and Knorringfjellet (3) collection sites. Redrawn and adapted from Dallmann et al. (2001) by H.A. Nakrem, used with permission. B. Chrono- and lithostratigraphic correlation for the Late Jurassic-Earliest Cretaceous interval of central Spistbergen. The Slottsmøya Member is indicated by a star. Modified with permission from Dalseg et al. (2016). C. Janusfjellet locality, 78°20′35.4″ N, 15°49′85.2″ E, surface outcrop. D. Konusdalen locality, 78°19′97.1″ N, 15°52′15.5″ E, in situ layer. E. Knorringfjellet locality, N 78° 18' 04.4" E 16° 16' 02.0", surface outcrop.
FIGURE 4 in A new viviparous species of asterinid (Echinodermata, Asteroidea, Asterinidae) and a new genus to accommodate the species of pantropical exiguoid sea stars
FIGURE 4. Aboral view of the gonads of C. hystera n. sp. filled with late stage juveniles just prior to leaving the parent, Juveniles about 500 µ m.
FIGURE 3. a in A new viviparous species of asterinid (Echinodermata, Asteroidea, Asterinidae) and a new genus to accommodate the species of pantropical exiguoid sea stars
FIGURE 3. a) Colour in life Cryptasterina hystera n. sp. (at left) and Cryptasterina pentagona (at right) Photograph. M Byrne. b) Statue Bay, central Queensland. Boulder and cobble beach. Type locality for C. hystera n. sp. Photograph. S McKillup.
FIGURE 2 in A new viviparous species of asterinid (Echinodermata, Asteroidea, Asterinidae) and a new genus to accommodate the species of pantropical exiguoid sea stars
FIGURE 2. Abactinal surface of holotype of Cryptasterina hystera sp. nov. (R = 10.2 mm) Emergent young visible in the interradius to left of image.
Figure 3 in New asterinid species from Africa and Australia (Echinodermata: Asteroidea: Asterinidae)
Figure 3. Asterina hoensonae sp. nov. (photos a, c by L. Altoff and A. Falconer; b, d by C. Rowley). Holotype, NHM 1975.10.29.47 (R = 12 mm). a, abactinal surface with section of abactinal plates removed. b, abactinal subdigitiform to subgranuliform spinelets. c, abactinal view (plates cleared, section of plates removed), showing doubly papulate carinal series of plates (left arrows) and absence of superambulacral plates (right arrow). d, oral, suboral, furrow, subambulacral and proximal actinal spines.
Figure 5 in New asterinid species from Africa and Australia (Echinodermata: Asteroidea: Asterinidae)
Figure 5. Tegulaster leptalacantha (H.L. Clark, 1916) (photos by C. Rowley). a, c, e, Disasterina leptalacantha var africana Mortensen, 1933, syntype, S.A.M. A22559 (R = 16 mm). a, abactinal surface (not cleared). c, tufts of acicular inferomarginal spinelets. e, oral, suboral, furrow, subambulacral and proximal actinal spines. Tegulaster leptalacantha, b, d, f, Sodwana Bay specimens. b, disc and proximal abactinal surface (not cleared; MRAC 1746; R = 17 mm). d, tufts of acicular inferomarginal spinelets (MRAC 1744; R = 18 mm). f, oral, suboral, furrow, subambulacral and proximal actinal spines (MRAC 1746; R = 17 mm)
Figure 2. Asterina gracilispina H.L. Clark, 1923 in New asterinid species from Africa and Australia (Echinodermata: Asteroidea: Asterinidae)
Figure 2. Asterina gracilispina H.L. Clark, 1923 (photos by C. Rowley). Holotype, S.A.M. A22559 (R = 6 mm). a, abactinal surface, insert showing spinelets. b, carinal series of doubly papulate plates and spinelets. c, actinal surface with actinal plates in longitudinal series. d, oral, suboral, furrow, subambualcral and proximal actinal spines.
Figure 4 in New asterinid species from Africa and Australia (Echinodermata: Asteroidea: Asterinidae)
Figure 4. Callopatiria cabrinovici sp. nov. (photos by L. Altoff and A. Falconer). Holotype, NHM 1965.6.1.743 (R = 27–35 mm). a, abactinal view, insert showing spinelets. b, cleared proximal upper ray showing "field" of irregular singly papulate primary and few secondary plates. c, lateral view of cleared ray showing longitudinal series of plates, and superomarginal and inferomarginal series of plates. d, cleared ray with section of abactinal plates removed, showing superactinal plates (upper right arrow), superambulacral plates (lower right arrow) and ambulacral plates (left arrow). e, actinal surface showing longitudinal series of actinal plates. f, oral, suboral, furrow, subambulacral and proximal actinal spines.
Figure 17. a–d in A molecular and morphological revision of genera of Asterinidae (Echinodermata: Asteroidea)
Figure 17. a–d, Stegnaster inflatus (cleared, R = 45 mm, NMV F95675): a, abactinal globose spinelets and granules; b, internal adradial interradius, showing absence of superambulacral plates (left) and presence of superactinal plates (right); c, actinal furrow spines, and granule-covered integument; d, actinal glassy thorn-tipped spines. e–f, Tremaster mirabilis (R = 60 mm, NMV F67741): e, arched body, with abactinal brood chamber pore (arrow); f, ambulacrum showing vertical series of furrow spines.
Figure 15. a–b in A molecular and morphological revision of genera of Asterinidae (Echinodermata: Asteroidea)
Figure 15. a–b, Paranepanthia platydisca (R = 55 mm, holotype, USNM 32644): a, cleared abactinal ray from upper ray to margin; b, ambulacrum with adambulacral and actinal plates and spines. c, Paranepanthia grandis (R = 50 mm, NMV F73976): section of ray showing superactinal plates supporting margin, and absence of superambulacral plates. d, Patiria miniata (R = 65 mm, NMV F97444): cleared abactinal surface with subpaxilliform clusters of granuliform spinelets. e–f, Patiria pectinifera (R = 40 mm, NMV F95672): e, cleared abactinal surface, with subpaxilliform globose spinelets; f, cleared abactinal surface, with papular spaces, secondary plates and papulae.
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