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5 results for “Mellitidae”
FIGURE 5 in A new genus of mellitid sand dollar (Echinoidea: Mellitidae) from the eastern Pacific coast of the Americas
FIGURE 5. Growth series or size dependent grade in structures of bidentate pedicellariae in M. notabilis.
FIGURE 4 in A new genus of mellitid sand dollar (Echinoidea: Mellitidae) from the eastern Pacific coast of the Americas
FIGURE 4. Bidentate pedicellariae (A–F, i jaw-set, ii internal view of valve, iii side view of valve), biphyllous pedicellariae (G–H, i jaw-set, ii internal view of valve, iii side view of valve) and spines (I–O, i aboral club-shaped spine front view, ii side view, iii interambulacral margin spine, iii front view, iv side view) from: A, G & I, M. quinquiesperforata; B & J, M. tenuis; C & K, M. notabilis (high wave-energy ecophenotype); D & L, M. notabilis (low wave-energy ecophenotype); E, H & M, L. longifissa; N, L. grantii (high wave-energy ecophenotype), F & O, L. grantii (low wave-energy ecophenotype).
FIGURE 3 in A new genus of mellitid sand dollar (Echinoidea: Mellitidae) from the eastern Pacific coast of the Americas
FIGURE 3. Denuded tests (i aboral, ii oral, iii lateral-view, anterior to right) of: A, M. quinquiesperforata (San Blas, Panama); B, M. tenuis (Florida, USA); C, M. notabilis (Michoacan, Mexico, high wave-energy ecophenotype); D, M. notabilis (Las Lajas, Panama, low wave-energy ecophenotype); E, L. longifissa (Bahia Magdalena, Mexico, high wave-energy ecophenotype); F, L. longifissa (Punta Chame, Panama, low wave-energy ecophenotype); G, L. grantii (Malcomb, Mexico, high wave-energy ecophenotype), H, L. grantii (Bahia de Kino, Mexico, low wave-energy ecophenotype).
FIGURE 2 in A new genus of mellitid sand dollar (Echinoidea: Mellitidae) from the eastern Pacific coast of the Americas
FIGURE 2. Entire, live-caught specimens (i aboral, ii oral, iii lateral-view, anterior to right) of: A, M. quinquiesperforata (San Blas, Panama); B, M. tenuis (Florida, USA); C, M. notabilis (Michoacan, Mexico, high wave-energy ecophenotype); D, M. notabilis (Las Lajas, Panama, low wave-energy ecophenotype); E, L. longifissa (Mazatlan, Mexico); F, L. grantii (Malcomb, Mexico, high wave-energy ecophenotype); G, L. grantii (Bahia de Kino, Mexico, low wave-energy ecophenotype).
FIGURE 1 in A new genus of mellitid sand dollar (Echinoidea: Mellitidae) from the eastern Pacific coast of the Americas
FIGURE 1. Timing of cladogenesis based on concatenated COI, 16S, and 28S data, as derived from analysis on BEAST calibrated using the fossil record and the final closure of the Panama Isthmus (adapted from Coppard et al. 2013). Ages of stages and epoch series are based on International Commission on Stratigraphy stratigraphic chart (Cohen et al. 2012). Error bars estimated by BEAST are shown in light blue. Colours of clades indicate geographic range (red = Atlantic and Caribbean, blue = eastern Pacific, green = Gulf of California).
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