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397 results for “Echinoidea”
Figure 4 in First record of the heart urchin Plagiobrissus grandis (Gmelin, 1791) (Echinodermata: Echinoidea) in the coastal region of Paraná, southern Brazil
Figure 4. Fixed specimen Plagiobrissus grandis (ECH 033) – captured at approximately 10 m depth near Parque Nacional Marinho das Ilhas dos Currais (Paraná State). Oral view, detail of peristome (A), subanal fasciole (B) and anal fasciole and periproct (C). Photo: Maristela Bueno.
FIGURE 74 in Illustrated guide to the echinoid (Echinodermata: Echinoidea) fauna of South Africa
FIGURE 74. Brisaster capensis (SAMC-A22295). A. Map showing distribution. B. Aboral view of preserved specimen. C. Oral view of preserved specimen. D. Side view of preserved specimen.
FIGURE 20. Sperosoma biseriatum A. Map showing distribution. B in Illustrated guide to the echinoid (Echinodermata: Echinoidea) fauna of South Africa
FIGURE 20. Sperosoma biseriatum A. Map showing distribution. B. Aboral view of preserved specimen (Schultz, 2010). C. Oral view of preserved specimen (Schultz, 2010).
FIGURE 1 in Late Cretaceous species of Vologesia (Echinoidea, Cassiduloida) from northern Spain
FIGURE 1. Simplified map of the vicinity of the village of Langre, showing the origins of Vologesia toucasi (Lambert, 1911) (A) and Vologesia rollingstones sp. nov. (B).
FIGURE 17 in Taxonomic guide and historical review of echinoids (Echinodermata: Echinoidea) from northeastern Brazil
FIGURE 17. Morphological characters of Plagiobrissus grandis (UFBA00522). (A) Aboral view; (B) Oral view; (C) Lateral view; (D) Skeletal rod; (E) Detail of the skeletal rod; (F) Ophicephalous pedicellariae; (G) Triphyllous pedicellariae; (H) Head of triphyllous pedicellariae; (I) Head of ophicephalous pedicellariae; (J) Valve of tridentate pedicellaria; (K) specialized tube foot from the peristomial region.
FIGURE 9 in Taxonomic guide and historical review of echinoids (Echinodermata: Echinoidea) from northeastern Brazil
FIGURE 9. Morphological characters of Echinoneus cyclostomus (UFPB/ECH.1973) (A–D) and Schizaster floridiensis (UFRJ, without voucher) (E–L). (A) Aboral view; (B) Apical system; (C) Oral view; (D) Lateral view; (E) Aboral view; (F) Oral view; (G) Lateral view; (H–L) Illustrations of pedicellariae of S. floridiensis provided by Chesher (1966); (H) Rostrate pedicellariae; (I) Valve of tridentate pedicellariae; (J) Valve of globiferous pedicellariae; (K) Globiferous pedicellariae.
FIGURE 4 in A new species of Fibularia from Japanese waters with a redescription of F. japonica and F. ovulum (Echinodermata: Echinoidea: Clypeasteroida)
FIGURE 4. Increase of pore number in petal III through growth in F. coffea, F. japonica, and F. ovulum. White circles indicate the specimens collected newly from Japanese waters in this study. Grey circles indicate type specimens (F. japonica) and specimens collected from Maldives (F. ovulum). Grey stars indicate holotype (F. coffea and F. japonica). X-mark in F. japonica indicates the paratype of F. japonica re-identified as F. coffea (UMUTZ-Ecn-SG10-17T No. 7).
FIGURE 2 in A new species of Fibularia from Japanese waters with a redescription of F. japonica and F. ovulum (Echinodermata: Echinoidea: Clypeasteroida)
FIGURE 2. Dimensions and pore arrangements of Fibularia species. A, aboral view; B, oral view; C, left lateral view; D, enlarged view of the apical system; E, enlarged view of the petaloid region. Abbreviations are as follows. Dimensions: AL = length of periproct, A-Tp = distance between periproct and posterior edge of test, AW = width of periproct, GD = diameter of gonopore 2 sensu Lovén's system (Lovén 1874), PL = length of petaloid region, PW = width of petaloid region, S-A = distance between peristome and periproct, SL = length of peristome, SW = width of peristome, TH = test height, TL = test length, TW = test width. Morphological terms: g = genital pore, hg = groove in hydropore, o = ocular pore, p = pore pair, ppr = periproct, pst = peristome, ab = aboral; ant = anterior; or = oral; post = posterior.
FIGURE 6 in A new species of Fibularia from Japanese waters with a redescription of F. japonica and F. ovulum (Echinodermata: Echinoidea: Clypeasteroida)
FIGURE 6. Increase of gonopore diameter (GD) through growth in F. coffea, F. japonica, and F. ovulum. White circles indicate the specimens collected newly from Japanese waters in this study. Grey circles indicate type specimens (F. japonica) and specimens collected from Maldives (F. ovulum). Grey stars indicate holotype (F. coffea and F. japonica).
FIGURE 14. Fibularia ovulum Lamarck, 1816 in A new species of Fibularia from Japanese waters with a redescription of F. japonica and F. ovulum (Echinodermata: Echinoidea: Clypeasteroida)
FIGURE 14. Fibularia ovulum Lamarck, 1816 (NSMT E-10392, Vavvaru Island, Maldives). A–C, SEM images of the test; A, aboral view; B, oral view; C, left lateral view; D–F, plate patterns of the test; D, aboral; E, oral; F, left lateral. Pores of each pore pair linked by fine dotted lines. Interambulacra shaded. Abbreviations as in Fig. 2.
FIGURE 11 in A new species of Fibularia from Japanese waters with a redescription of F. japonica and F. ovulum (Echinodermata: Echinoidea: Clypeasteroida)
FIGURE 11. SEM images of Fibularia japonica Shigei, 1982 (NSMT E-10390, Sagami Bay). A, primary spine from marginal of test (i, whole; ii, distal end; iii, proximal end); B, primary spine around peristome (i, whole viewed from peristomial side ii, whole viewed from towards peristome); C, miliary spine from marginal of test (i, whole; ii, distal end; iii, proximal end); D, ophicephalous pedicellariae (i, head; ii, stem); E, tridentate pedicellariae (i, head; ii–iv, internal view of valve).
FIGURE 37 in Taxonomy and distribution of irregular echinoids (Echinoidea: Irregularia) from Sri Lanka
FIGURE 37. Jacksonaster sp. 1 (WUSL/EI/26), oral and aboral tuberculation: A, aboral side; B, oral side.
FIGURE 53 in Taxonomy and distribution of irregular echinoids (Echinoidea: Irregularia) from Sri Lanka
FIGURE 53. Adoral plate pattern of interambulacrum 5 in Echinodiscus bisperforatus: A, WUSL/EI/68; B, WUSL/EI/69; C, WUSL/EI/66; D, WUSL/EI/65.
FIGURE 52 in Taxonomy and distribution of irregular echinoids (Echinoidea: Irregularia) from Sri Lanka
FIGURE 52. Basicoronal and corresponding postbasicoronal interambulacral plates in Echinodiscus bisperforatus: A, interambulacra 2, 3 in contact and 1, 4, 5 disjunct (WUSL/EI/65); B, interambulacra 1, 2, 3, 4, 5 disjunct (WUSL/EI/66); C, interambulacra 1, 2, 3, 4, 5 disjunct (WUSL/EI/69); D, interambulacra 2 in contact and 1, 3, 4, 5 disjunct (WUSL/EI/139).
FIGURE 48 in Taxonomy and distribution of irregular echinoids (Echinoidea: Irregularia) from Sri Lanka
FIGURE 48. Variation of test shape of Peronella oblonga: A, B, WUSL/EI/50; C, D, WUSL/EI/51; E, F, WUSL/EI/53.
FIGURE 55 in Taxonomy and distribution of irregular echinoids (Echinoidea: Irregularia) from Sri Lanka
FIGURE 55. Echinodiscus cf. truncatus: A, aboral view with spines (WUSL/EI/63); B, oral view with spines (WUSL/EI/63); C, aboral view without spines (WUSL/EI/60); D, oral view without spines (WUSL/EI/60); E, lateral view (WUSL/EI/60).
Fig. 3 in Comparative morphology and phylogenetic significance of Gregory's diverticulum in sand dollars (Echinoidea: Clypeasteroida)
Fig. 3 Absence of Gregory's diverticulum in the Rolutidae (a–e) as well as presence and shape of the organ in the Taiwanasteridae (f–j) and Echinarachniidae (k–t). The figure shows selected X-ray images. a, b Heliophora orbicularis (15, 46 mm test length); c–e Rotula deciesdigitatus (17, 22, 50 mm); f–j Sinaechinocyamus mai (1.5, 3.5, 6, 6.5, 7.5 mm); k–o
Fig. 7 in Comparative morphology and phylogenetic significance of Gregory's diverticulum in sand dollars (Echinoidea: Clypeasteroida)
Fig. 7 Presence and shape of Gregory's diverticulum in the Mellitidae (Mellita). The figure shows selected X-ray images. a–e Mellita grantii (23, 26, 29, 30, 37 mm test length); f–j Mellita isometra (6, 10, 12, 21, 26 mm); k–n Mellita longifissa (16, 20, 29, 48 mm); o Mellita tenuis
Fig. 5 in Rediscovery of an internal organ in heart urchins (Echinoidea: Spatangoida): morphology and evolution of the intestinal caecum
Fig. 5 Occurrence of the intestinal caecum in heart urchins (Echinoidea: Spatangoida). a An intestinal caecum is found only in the Schizasteridae (Spatangoida: Paleopneustina). b Distribution of the intestinal caecum among schizasterids. Both phylogenetic trees show the results of an analysis based on morphological characters (Stockley et al. 2005). The three genera mentioned as incertae sedis were not part of the cited phylogenetic study. Black-framed box genus analyzed in the present study, black square hypothetical evolutionary event, black star intestinal caecum present in all species analyzed, black-framed star intestinal caecum present only in some of the analyzed species, cross fossil taxon, R! loss of structure
Fig. 2 in Rediscovery of an internal organ in heart urchins (Echinoidea: Spatangoida): morphology and evolution of the intestinal caecum
Fig. 2 Gross morphology and histology of the digestive tract of Brisaster. a Schematic frontodorsal view of the digestive tract of B. latifrons, modified after De Ridder et al. (1985). b Oral view of the digestive tract of B. antarcticus. Part of the stomach removed (stippled line) to expose the intestinal caecum. Ambulacrum III facing upwards. c–h Histological sections through the posterior digestive tract of B. latifrons, their approximate locations indicated in (b). c Intestine. d Intestinal caecum. e Vacuoles inside the simple columnar epithelium of the intestinal caecum. f Part of the canal connecting intestinal caecum and intestine. g Mesenterial suspension of the intestinal caecum. h Rectum. Table 2 provides additional specimen information. ae anterior esophagus, bc buccal cavity, ca canal, ct connective tissue, ep epithelium, gc gastric caecum, ic intestinal caecum, in intestine, lu lumen of the digestive tract, me mesentery, nu nucleus, pe posterior esophagus, re rectum, si primary siphon, so somatocoel, va vacuole
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