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397 results for “Echinoidea”
FIGURE 4 in The test architecture of Clypeaster (Echinoidea, Clypeasteroida) and its phylogenetic significance
FIGURE 4. Test profile outlines showing position of measurements taken. A. Clypeaster ravenelii, B. Clypeaster australasiae, C. Clypeaster fervens, D. Clypeaster subdepressus, E. Clypeaster humilis, F. Clypeaster rangianus, G. Clypeaster rarispinus, H. Clypeaster japonicus, I. Clypeaster reticulatus, J. Clypeaster rosaceus, K. Clypeaster annandalei, L. Clypeaster telurus.
FIGURE 5 in The test architecture of Clypeaster (Echinoidea, Clypeasteroida) and its phylogenetic significance
FIGURE 5. Histograms of continuously variable characters with break points used for defining character states marked. Circle = mean; diamonds = minimum and maximum.
FIGURE 3. A, B, NHM 1968.12.6.69 in The test architecture of Clypeaster (Echinoidea, Clypeasteroida) and its phylogenetic significance
FIGURE 3. A, B, NHM 1968.12.6.69, Clypeaster rarispinus de Meijere, 1902, Eritrea coast; A, oral, B, apical. C, D, NHM EE14008, Arachnoides placenta Linnaeus 1758, Cairns, Australia; C, oral, D, apical. E, F, NHM 1939.6.15.44, Ammotrophus cyclius Clark, 1938, Encounter Bay, Australia; E, apical, F, oral. G, H, NHM 57883, Sismondia occitana (Defrance, 1827), Eocene (Priabonian) of St Colombe, Manche, France; G, apical, H, oral. I, NHM 1953.1.24.34, Clypeaster telurus Clark, 1914, Monte Bello Island, Australia; oral side. J, NHM EE14010, Clypeaster subdepressus (Gray, 1825), Carrie Bow Cay, Belize; apical. Scale bar = 10 mm.
FIGURE 7 in The test architecture of Clypeaster (Echinoidea, Clypeasteroida) and its phylogenetic significance
FIGURE 7. Camera lucida drawings of petal plating on the aboral side showing the correlation between number of occluded plates (grey) and degree of closure of petals. A. Clypeaster annandalei Koehler, 1922; NHM 1948.12.9.122; open petals. B. Clypeaster ravenelii (Agassiz, 1869); NHM 1937.5.9.18; closed petals. Scale bar 5 mm; apical plates at top.
FIGURE 7 in Rediscovery and redescription of Cassidulus infidus (Echinoidea: Cassidulidae) from Northeastern Brazil
FIGURE 7. SEM of external appendages of Cassidulus infidus UFBA-314: (A) complete ophicephalous pedicellaria from the edge of the test, (B) single valve of ophicephalous pedicellaria depicted in (A), (C) external and (D) internal view of tridentate pedicellaria from periproctal plate; and (E) SEM of primary tubercle from the oral side of the test. Scale bars for A-D are 10 µm and for (E) is 100 µm long.
FIGURE 6 in Rediscovery and redescription of Cassidulus infidus (Echinoidea: Cassidulidae) from Northeastern Brazil
FIGURE 6. Drawings of Cassidulus infidus UFBA-314 showing: miliary spines from (A) aboral and (B) oral surface; and primary spines from (C) aboral surface, (D) bourrelets, (E) oral surface, and (F) just under hood, near periproct. Scale bars are in µm.
FIGURE 5 in Rediscovery and redescription of Cassidulus infidus (Echinoidea: Cassidulidae) from Northeastern Brazil
FIGURE 5. Drawings of Cassidulus infidus UFBA-314 showing: (A) internal view of periproct from specimen 9.46 mm long; and (B) periproctal plate pattern showing primary tubercles represented by two concentric circles and miliary tubercles represented by small black circles from specimen 12.86 mm long. Scale bars are 0.5 mm long.
FIGURE 4 in Rediscovery and redescription of Cassidulus infidus (Echinoidea: Cassidulidae) from Northeastern Brazil
FIGURE 4. Drawings of Cassidulus infidus UFBA-314 showing: (A) floscele with peristome aperture in light solid gray, bourrelets shaded, naked zone pits in dark solid gray, sphaeridial pits in solid black, phyllopores and primary tubercles represented by small open circles and three concentric circles, respectively, and (B) basicoronal plates around peristome aperture in light gray, from specimen 12.86 mm long; (C) internal oral surface of phyllode IV (phyllopores in solid black) from specimen 9.46 mm long; and (D) SEM of sphaeridium from pit in interambulacrum 5. Scale bars for A-C are 1 mm and for D is 10 µm long.
FIGURE 2 in Rediscovery and redescription of Cassidulus infidus (Echinoidea: Cassidulidae) from Northeastern Brazil
FIGURE 2. Cassidulus infidus SMNH-Type-4859 (holotype): (A) aboral and (B) oral surface; UFBA-314: (C) aboral, (D) oral and (E) periproctal surface of largest specimen; UFBA-757: (F) side view of test; and UFBA-314: (G) oral surface of smallest specimen. Scale bars are 2 mm long.
FIGURE 3 in Rediscovery and redescription of Cassidulus infidus (Echinoidea: Cassidulidae) from Northeastern Brazil
FIGURE 3. Drawings of Cassidulus infidus UFBA-314 showing: (A) apical disc with four genital pores in dark gray, five ocular plates in light gray enclosing ocular pores, and hydropores represented by small open circles; and (B) poriferous and interporiferous zones of ambulacrum II, pore pairs in dark gray, miliary tubercles represented by small open circles and primary by two concentric circles. Scale bars are 0.5 and 0.1 mm long, respectively.
FIGURE 1 in Rediscovery and redescription of Cassidulus infidus (Echinoidea: Cassidulidae) from Northeastern Brazil
FIGURE 1. Drawings of Cassidulus infidus UFBA-314 showing: shape of test in (A) aboral, (B) oral, (C) side and (D) posterior views. Scale bar is 2 mm long.
FIGURE 3. A–B in Description of two new fossil echinoids (Echinodermata: Echinoidea) from the Early Hauterivian (Early Cretaceous) of the Paris Basin (France)
FIGURE 3. A–B, drawings of plate pattern in Salvaster roberti gen. et sp. nov., holotype, UBGD 277467; apical system (A) and plastron (B).
FIGURE 2. A-E in Description of two new fossil echinoids (Echinodermata: Echinoidea) from the Early Hauterivian (Early Cretaceous) of the Paris Basin (France)
FIGURE 2. A-E, Salvaster roberti gen. et sp. nov., holotype, UBGD 277467, Calcaires à Spatangues Fm, Saint-Sauveur; apical (A), lateral (B), oral (C), frontal (D) and posterior (E) views of test, x2.2. Scale bar: 10 mm.
FIGURE 6. A–C in Description of two new fossil echinoids (Echinodermata: Echinoidea) from the Early Hauterivian (Early Cretaceous) of the Paris Basin (France)
FIGURE 6. A–C, Stomechinus fallax (Agassiz, 1840), UBGD 277468, Auxerre, apical (A), oral (B) and lateral (C) views. D–F, Nucleolites salviensis (Cotteau, 1851), UBGD 277469, L'Orme du Pont, apical (D), oral (E) and lateral (F) views. G–I, Disaster subelongatus (d'Orbigny, 1853), UBGD 277470, Venoy, apical (G), oral (H) and lateral (I) views; x2. Scale bars: 10 mm.
FIGURE 1 in Description of two new fossil echinoids (Echinodermata: Echinoidea) from the Early Hauterivian (Early Cretaceous) of the Paris Basin (France)
FIGURE 1. Map showing the area of the Paris Basin (France) where the Calcaires à Spatangues Fm crops out, along with the limit of the Hauterivian transgression and main fault systems (modified after Courtinat et al. 2006). Distribution of main lithofacies as defined by Rat et al. (1987). Black stars show type localities where new taxa, Salvaster roberti gen. et sp. nov. (Les Rèbles) and Pygolampas edita gen. et sp. nov. (Narcy) were collected.
FIGURE 5. A–B in Description of two new fossil echinoids (Echinodermata: Echinoidea) from the Early Hauterivian (Early Cretaceous) of the Paris Basin (France)
FIGURE 5. A–B, drawings of apical plate pattern (A) and phyllopores of ambulacrum IV (B) in Pygolampas edita gen. et sp. nov., holotype, GR-PC.1709.
FIGURE 4. A–E in Description of two new fossil echinoids (Echinodermata: Echinoidea) from the Early Hauterivian (Early Cretaceous) of the Paris Basin (France)
FIGURE 4. A–E, Pygolampas edita gen. et sp. nov., holotype, GR-PC.1709, Calcaires à Spatangues Fm, Narcy; apical (A), lateral (B), oral (C), anterior (D) and posterior (E) views of test, x1.2; F, detail of apical system and petals in apical view, x1.7. Scale bars: 10 mm.
FIGURE 3. A in Arbacia ballenensis sp. nov. (Echinoidea, Arbacioida): A new species reveals diversification of the genus in Central America
FIGURE 3. A. ballenensis sp. nov. A–B, paratypes in CASG 91189, specimen 21; A, aboral view; B, oral view; C, CASG 91189, specimen 20 in aboral view; D, paratype CASG 91189, specimen 24 in aboral view; E–F, CASG 91189, specimen 04; E, oral view; F, apical system; G, CASG 91189, specimen 03, perignathic girdle showing auricles. Scale bars equal 10 mm.
FIGURE 1 in Arbacia ballenensis sp. nov. (Echinoidea, Arbacioida): A new species reveals diversification of the genus in Central America
FIGURE 1. Type locality, area and stratigraphy of Arbacia ballenensis sp. nov. A, locations of fossiliferous exposures Angel de la Guarda (AG), Carmen (CA), Cerralvo (CE). B, fossiliferous localities along Bahía San Rafael with location (star) of type locality for Arbacia ballenensis sp. nov. C, stratigraphic column representing seaward-dipping beds of late Pliocene—Early Pleistocene Punta Ballena fan deposits (modified from Johnson et al. 2017) with position of Arbacia ballenensis sp. nov. indicated by image of holotype.
FIGURE 4 in Arbacia ballenensis sp. nov. (Echinoidea, Arbacioida): A new species reveals diversification of the genus in Central America
FIGURE 4. Spines attributed to A. ballenensis sp. nov. A–B, CASG 59779; C, spine found inside the peristome of CASG 91189, specimen 08. A–B, scale bars equal 2 mm. C, scale bar equals 1 cm.
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International Brain Laboratory public data
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OpenNeuro
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