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821 results for “Molecular Systematics”
FIGURE 50 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 50. Elysia pratensis, SEM of the radula and penis (CPIC 00068). A, Complete radula. B, Leading tooth. C, Ascus. D, Penis.
FIGURE 48 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 48. Elysia pratensis, external morphology and egg masses. A, Specimens from Bahamas in July 2004, feeding on Rhipocephalus brevicaulus. Note how longitudinal white stripes render slugs cryptic against green algal blades with white tips from emptied algal filaments. Field of view = 4 cm wide. B, Mating specimens showing reciprocal insemination. The long, flexible penis of each slug contacts the partner between the right anterior parapodial edge and the pericardium. Field of view = 15 mm. C, Egg mass spiral showing orange ECY ribbon winding around capsules containing early-stage embryos. Field of view = 2.5 mm. D, Egg mass with larvae undergoing encapsulated metamorphosis in the inner whorl (lower left), and darker, post-metamorphic juvenile siblings in the outer whorl (top and right). Note depletion of orange ECY, compared to earlier in development (C). Field of view = 4 mm.
FIGURE 49 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 49. Elysia pratensis, drawing of renopericardial complex and dorsal vessel network from two preserved specimens (left: LACM 178654, 3 mm wide; right: LACM 178655, 6 mm long × 4 mm across at widest point).
FIGURE 60. Elysia pawliki n in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 60. Elysia pawliki n. sp., SEM of the radula and penis. A, Radula (isolate Epaw_07Swe01). B, Leading tooth (isolate Epaw_07Swe01). C, Penis (isolate Epaw_07Swe01). D, Detail of the penis tip (isolate Epaw_07Swe01). E, Leading tooth (LACM 3304). F, Ascus (LACM 3304).
FIGURE 64. Elysia christinae n in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 64. Elysia christinae n. sp., external morphology and egg mass. A–B, Live specimens resting on host alga Rhipilia tomentosa, showing characteristic flattening of parapodia. Images taken within 2 weeks of field collection. Length of slugs = 11 mm (A), 8 mm (B). C, Crawling specimen showing tendency of posterior parapodia to bell out and remain flattened, giving the body a pear-shaped appearance. Length = 10 mm. D, Crawling specimen with body fully elongated and parapodia folded over dorsum; length = 9 mm. E–F, Relaxed specimens showing elongated renopericardial extension and dorsal vessel network. Images taken after specimens were held in aquaria for three months, at which point algal food was depleted and color faded to brownish-yellow. Length = 6 mm (E), 10 mm (F). G, Egg mass showing orange ECY ribbon and gastrula-stage embryos. Actual diameter = 2 mm.
FIGURE 71. Elysia taino n in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 71. Elysia taino n. sp., renopericardial complex and dorsal vessel networks traced from digital photographs of live specimens from Jamaica; actual lengths: 16 mm (A–B), 18 mm (C). Gray areas represent sperm-storage vesicles. Extended penis shown for all specimens.
FIGURE 66. Elysia christinae n in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 66. Elysia christinae n. sp., SEM of the radula and penis (LACM 3309). A, Complete radula. B, Leading tooth. C, Penis.
FIGURE 47 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 47. Elysia cornigera, SEM of the radula and penis. A, Radula, without ascus (CPIC 00078). B, Leading tooth, showing denticulate keel and smooth lateral edge (CPIC 00078). C, Leading tooth, showing serrated keel and denticulate lateral edge (CPIC 00081). D, Penis (LACM 173227).
FIGURE 46 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 46. Elysia cornigera, drawing of renopericardial complex and dorsal vessel network from photograph of live specimen (isolate Ecor_06Jam01, 3 mm long).
FIGURE 45 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 45. Elysia cornigera, external morphology and egg masses. A, Side view of live specimen from Geiger Beach, Key West, Florida (isolate Ecor_07Gei01; 4 mm long); note elongated, tapering rhinophores with knobby appearance, and orange vesicles in the epidermis. B–C, Specimen from Discovery Bay, Jamaica (isolate Ecor_06Jam01; 3 mm long). Side view showing larger anterior and smaller posterior wing-flap extensions to the parapodium, and large brown epithelial granules (B); dorsal view showing renopericardium (C). D–F, Specimen from Geiger Beach, Key West, Florida (isolate Ecor_07Gei01; 6 mm), showing red and orange spots on white parapodial flanks (D), larger brown granules embedded in anterior edge of parapodium (E), and, moustache of black spots on the oral lobes (F). G–H, Egg masses laid by two Florida specimens, showing semi-transparent (G) or pale yellow (H) ribbon of ECY and early-stage embryos; scale bars = 130 µm.
FIGURE 44 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 44. Elysia patina, SEM of the radula and penis. A, Complete radula (LACM 178652). B, Leading tooth (LACM 178649). C, Leading tooth (LACM 178652). D, Penis (LACM 178652), E, Loose teeth, showing triangular-shaped depressions.
FIGURE 42 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 42. Elysia patina, external morphology and egg mass; all specimens 6–8 mm in length from Sweetings Cay, Grand Bahamas Island, Bahamas. A–D, Views of four different live specimens showing brown transverse bands on rhinophores, and color variation from white to tan to brown-green, with white papillae. E, Relaxed specimen (8 mm) showing elongated renopericardial complex, dorsal vessel network, and opaque white gametic vesicles. F, Live specimen (6 mm) with parapodia held open showing dorsal vessels lined in iridescent blue, and gametic vesicles in a semi-transparent state. G, Egg mass spiral showing flat orange ECY ribbon above uncleaved ova. Actual diameter = 2 mm.
FIGURE 41 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 41. Elysia nisbeti, external morphology, dorsal vessels and radula. A, Photograph of holotype (BMNH 19774.W), showing dorsal vessels on right inner parapodial surface; holotype lacking head. B, Renopericardium and dorsal vessel network drawn from right side of holotype. C, Drawings of live animal (fig. 25b, c) and radula (fig. 26d) reproduced from Thompson (1977). D, Live specimen tentatively identified as E. nisbeti by external morphology, including the distinctive "Y"-shaped marking on head; photographed by J. Hamann in Bermuda.
FIGURE 34 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 34. Elysia serca, dorsal vessels drawn of a preserved specimen collected on Lee Stocking Island, Bahamas (LACM 172293; 2.5 mm long × 1.2 mm wide).
FIGURE 43 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 43. Elysia patina, drawing of renopericardial complex and dorsal vessel network traced from photographs of live specimens collected from Sweetings Cay, Bahamas in 2007: left, isolate Epat_07Swe01; right, isolate Epat_07Swe02. Grey areas represent sperm-storage vesicles.
FIGURE 31 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 31. Elysia canguzua, drawings of renopericardium and dorsal vessel network from a preserved specimen (LACM 178643; 5.5 mm long × 5 mm wide).
FIGURE 27 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 27. Elysia velutinus, external morphology and egg mass. Specimens photographed following field collection from Bocas del Toro, Panama (A–C, G; Dec 2004); Sweetings Cay, Bahamas (D–E; Jul 2007); or San Salvador, Bahamas (F; Jul 2007). All measurements give body length of specimens. A–B, Specimen (11 mm) with light green ground color and scattered tan spots. C, Darker green specimen, top view only (14 mm). D–E, Specimen (7 mm) showing characteristic white patch on head, and large white patches across parapodia. F, Specimen (9 mm) with sparse white patches along parapodial margin. G, Specimen (10 mm) with parapodia open, showing renopericardial complex and dorsal vessel network. H, Close-up of egg mass laid by specimen from San Salvador, Bahamas, showing orange ECY ribbon folding back and forth between capsules, each containing one lecithotrophic veliger larva. Scale bar = 200 µm.
FIGURE 26 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 26. Elysia subornata, SEM of the radula and penis. A, Complete radula (CPIC 00077). B, Leading tooth (CPIC 00077). C, Ascus (CPIC 00077). D, Penis (CPIC 00076). E, Complete radula (LACM 172297). F, Leading tooth (LACM 172297).
FIGURE 20 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 20. Elysia papillosa, SEM of the radula and penis. A, Radula minus a jumbled ascus (LACM 178613). B, Leading tooth (LACM 178613). C, Leading tooth, (LACM 178600). D, Penis, with stylet (LACM 178600). E, Penial stylet, dorsal and ventral views (LACM 178618).
FIGURE 17 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 17. Elysia chlorotica, SEM of the radula (LACM 178597). A, Radula, without ascus. B, Leading tooth. C, Close-up of cusp showing denticles.
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