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14 results for “Echinocyamus”
FIGURE 31. Echinocyamus grandiporus Mortensen, 1907 in The Echinoderm Fauna of the Azores (NE Atlantic Ocean)
FIGURE 31. Echinocyamus grandiporus Mortensen, 1907 (EMEPC–LUSO L09D22S2: A–C; EMEPC–LUSO L09D17B68R: D–F; EMEPC–LUSO L09D25B14: G; EMEPC–LUSO L09D25ARB43: H–I). Apical view (A, D, G, H); oral view (B, E, I); lateral view (C, F).
Fig. 11 in Symmetry disorders of the test of the Miocene echinoid Echinocyamus from Poland
Fig. 11. Example of "second type" deformity formed on the pentamerous system (Echinocyamus apicatus Mortensen, 1948, MWG/E/13) from Korytnica, Badenian. A. Aboral side. B. Oral side. C. Close−up of apical system. A1, B1, C1, photos of the specimen; A2, B2, C2, explanatory drawings of the same. I–V, growth zone; O, ocular pore; G, gonopore (genital pore); H, hydropore.
Fig. 10 in Symmetry disorders of the test of the Miocene echinoid Echinocyamus from Poland
Fig. 10. Models of apical systems. A. Primordial (normal) symmetry. B. Lovén symmetry. C–G. Primordial (changed) symmetry. A, B adopted from Saucéde et al. (2003). Abbreviations: L, axis−Lovén's axis; vU, axis−von Ubisch axis; PK, periproct; I–V, growth zone; G1–G5, genital areas.
Fig. 9 in Symmetry disorders of the test of the Miocene echinoid Echinocyamus from Poland
Fig. 9. Deformed test of Echinocyamus pusillus Müller, 1776 (MWG/E/2P) from Korytnica, Badenian. L+R− anomaly (5−ray changed symmetry). A. Aboral side. B. Oral side. C. Close−up of apical system. A1, B1, C1, photos of the specimen; A2, B2, C2, explanatory drawings of the same. I–V, growth zone; O, ocular pore; G, gonopore (genital pore); H, hydropore.
Fig. 8 in Symmetry disorders of the test of the Miocene echinoid Echinocyamus from Poland
Fig. 8. Deformed test of Echinocyamus apicatus Mortensen, 1948 (MWG/E/12) from Korytnica, Badenian. L+R− anomaly (5−ray changed symmetry). A. Aboral side. B. Oral side. C. Close−up of apical system. A1, B1, C1, photos of the specimen; A2, B2, C2, explanatory drawings of the same. I–V growth zone; O, ocular pore; G, gonopore (genital pore); H, hydropore.
Fig. 7 in Symmetry disorders of the test of the Miocene echinoid Echinocyamus from Poland
Fig. 7. Deformed test of Echinocyamus apicatus Mortensen, 1948 (MWG/E/11) from Korytnica, Badenian. L−R+ anomaly (5−ray changed symmetry). A. Aboral side. B. Oral side. C. Close−up of apical system. A1, B1, C1, photos of the specimen, A2, B2, C2, explanatory drawings of the same. I–IV, growth zone; O, ocular pore; G, gonopore (genital pore); H, hydropore.
Fig. 6 in Symmetry disorders of the test of the Miocene echinoid Echinocyamus from Poland
Fig. 6. Deformed test of Echinocyamus apicatus Mortensen, 1948 from Korytnica, Badenian, illustrating the changing position of the periproct in R− anomaly (4−ray symmetry). A. MWG/E/8; aboral side (A1), oral side (A2). B. MWG/E/9; aboral side (B1), oral side (B2). C. MWG/E/10; aboral side (C1), oral side (C2). Scale bars 0.5 mm.
Fig. 5 in Symmetry disorders of the test of the Miocene echinoid Echinocyamus from Poland
Fig. 5. Deformed test of Echinocyamus apicatus Mortensen, 1948 (MWG/E/7) from Korytnica, Badenian. R− anomaly (4−ray symmetry). A. Aboral side. B. Oral side. C. Close−up of apical system. A1, B1, C1, photos of the specimen; A2, B2, C2, explanatory drawings of the same. I–V, growth zone; O, ocular pore; G, gonopore (genital pore); H, hydropore.
Fig. 3 in Symmetry disorders of the test of the Miocene echinoid Echinocyamus from Poland
Fig. 3. Deformed test of Echinocyamus apicatus Mortensen, 1948 (MWG/E/3) from Korytnica, Badenian. L− anomaly (4−ray symmetry). A. Aboral side. B. Oral side. C. Close−up of apical system. A1, B1, C1, photos of the specimen, A2, B2, C2, explanatory drawings of the same. I–V growth zone; O, ocular pore; G, gonopore (genital pore); H, hydropore.
Fig. 2 in Symmetry disorders of the test of the Miocene echinoid Echinocyamus from Poland
Fig. 2. Deformed test of Echinocyamus apicatus Mortensen, 1948 (MWG/E/1) from Korytnica, Badenian. L+ anomaly (6−ray symmetry). A. Aboral side. B. Oral side. C. Close−up of apical system. A1, B1, C1, photos of the specimen; A2, B2, C2, explanatory drawings of the same. I–V growth zone; O, ocular pore; G, gonopore (genital pore); H, hydropore.
Fig. 1 in Symmetry disorders of the test of the Miocene echinoid Echinocyamus from Poland
Fig. 1. Correctly developed test of fibulariid echinoid Echinocyamus apicatus Mortensen, 1948 (MWG/E/0) from Korytnica, Badenian. A. Aboral side. B. Oral side. C. Close−up of apical system. A1, B1, C1, photos of the specimen; A2, B2, C2, explanatory drawings of the same. I–V, growth zone; O, ocular pore; G, gonopore (genital pore); H, hydropore.
Fig. 4 in Symmetry disorders of the test of the Miocene echinoid Echinocyamus from Poland
Fig. 4. Deformed test of Echinocyamus calariensis (Lambert, 1907) (MWG/E/1P) from Korytnica, Badenian. L− anomaly (4−ray symmetry). A. Aboral side. B. Oral side. C. Close−up of apical system. A1, B1, C1, photos of the specimen; A2, B2, C2, explanatory drawings of the same. I–V growth zone; O, ocular pore; H, hydropore.
Data from: Structural design of the minute clypeasteroid echinoid Echinocyamus pusillus
The clypeasteroid echinoid skeleton is a multi-plated, light-weight shell construction produced by biomineralization processes. In shell constructions, joints between individual elements are considered as weak points, yet, these echinoid skeleton shows an extensive preservation potential in both Recent and fossil environments. The remarkable strength of the test is achieved by skeletal reinforcement structures and their constructional layouts. Micro-computed tomography and scanning electron microscopy are used for micro-structural and volumetric analyses of the echinoid's skeleton. It is shown, that strengthening mechanisms act on different hierarchical levels from the overall shape of the skeleton to micro-skeletal interlocking. The tight-fitting and interlocking plate joints lead to a shell considered to behave as a monolithic structure. The plate's architecture features distinct regions interpreted as a significant load transferring system. The internal support system follows the segmentation of the remaining skeleton, where sutural layout and stereom distribution are designed for effective load transfer. The structural analysis of the multi-plated, yet monolithic skeleton of Echinocyamus pusillus reveals new aspects of the micro-morphology and its structural relevance for the load-bearing behaviour. The analysed structural principles allow E. pusillus to be considered as a role model for the development of multi-element, light-weight shell constructions.
Data from: Structural design of the minute clypeasteroid echinoid Echinocyamus pusillus
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