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166 results for “Sacoglossa”
FIGURE 67. Elysia hamanni n in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 67. Elysia hamanni n. sp., external morphology and egg mass. Characteristic round feeding scars on host alga Caulerpa prolifera visible in all panels. A–B Live specimens from Grenada. C, Egg mass showing orange ECY ribbon.
FIGURE 72. Elysia taino n in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 72. Elysia taino n. sp., SEM of the radula and penis. A, Radula minus a jumbled ascus (LACM 3313). B, Leading tooth (LACM 3313). C, Penis (LACM 3312). D, Penial stylet, dorsal and ventral views (LACM 178605).
FIGURE 63. Elysia zemi n in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 63. Elysia zemi n. sp., SEM of the radula and penis. A, Complete radula (LACM 178666). B, Leading tooth (LACM 178666). C, Ascus (LACM 178666). D–E, Penis and detail of penis tip showing stylet (LACM 178666). F, Radula (LACM 3306). G, Leading tooth (LACM 3306). H, Ascus (LACM 3306).
FIGURE 62. Elysia zemi n in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 62. Elysia zemi n. sp., dorsal vessel network drawn from preserved specimen (LACM 3307; dimensions 16 mm long × 14 mm wide). Shaded areas represent the external surface of the animal.
FIGURE 61. Elysia zemi n in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 61. Elysia zemi n. sp., external morphology of specimens from Martinique. A–B, Dorsal view of specimens with parapodia held open. C, Crawling specimen photographed underwater. D, Dorsal view of live specimen with parapodia partly closed, showing elongated marginal papillae. E, Side view of live specimen photographed underwater. F, Dorsal view of damaged specimen (LACM 3307) showing network of dark dorsal vessels. All photographs courtesy of Yan Buske.
FIGURE 58. Elysia pawliki n in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 58. Elysia pawliki n. sp., external morphology and egg mass of specimens from Sweetings Cay, Bahamas. A, Live specimen with six siphonal openings formed by parapodial flaps (LACM 3303; length = 35 mm). B–E, Live specimen viewed from above (B), right side (C), underneath (D), or with parapodia spread open (E) to show renopericardial complex and dorsal vessels (isolate Epaw_07Swe01; length = 25 mm). Purple egg masses of parasitic copepod visible. F, Egg mass (deposited by specimen LACM 3303), showing orange ECY ribbon and early-stage embryos. Field of view = 3 mm.
FIGURE 57 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 57. Elysia ellenae SEM of the radula and penis (LACM 178663). A, Complete radula. B, Leading tooth. C, Penis.
FIGURE 56 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 56. Penial morphology of some species examined. A, Elysia buonoi n. sp. (LACM 178675) B, Elysia orientalis (CPIC 00842). C, Elysia ellenae (LACM 178663). D, Elysia pawliki n. sp. (LACM 3303). E, Elysia christinae n. sp. (LACM 3309). F, Elysia zemi n. sp. (LACM 3307). G, Elysia taino n. sp. (LACM 178607). H, Elysia hamanni n. sp. (LACM 178667). Abbreviations: dd, deferent duct; pe, penis; s, stylet.
FIGURE 55 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 55. Elysia ellenae, drawing of the pericardium and dorsal vessels of a preserved specimen (LACM 178663; 3.5 mm long).
FIGURE 54 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 54. Elysia ellenae, external morphology of live specimen from New Providence, Bahamas (A–D, Eell_10NPr01) and additional specimens from the Cayman Islands (E–G, images courtesy of Everett Turner). A, Live specimen immediately following collection, showing characteristic red and blue patches above eye, three siphonal openings formed by the parapodia, and the red and blue bands along the parapodial margin. Length of slug = 5 mm. B, Side view showing dark green digestive diverticula penetrating the distal (bottom) half of the right parapodium. C, View of dorsum showing rounded pericardium, from which red-speckled dorsal vessels extend out to the parapodial margin. D, Pedal view, showing digestive and blue iridescent spots on the pointed foot. E–G, Three different specimens photographed underwater in the Cayman Islands, showing individual variation in the degree to which parapodia are papillate, pigmented, and penetrated by digestive diverticula.
FIGURE 59. Elysia pawliki n in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 59. Elysia pawliki n. sp., drawing of the renopericardial complex and dorsal vessel network traced from a photograph of a live animal (isolate Epaw_07Swe01; 2.5 cm long). Grey shapes are egg masses of parasitic copepod.
FIGURE 53 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 53. Elysia zuleicae, SEM of the radula and penis (CPIC 00089). A, Complete radula including ascus. B, Leading tooth. C, Penis. D, Close-up view of penial stylet.
FIGURE 51 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 51. Elysia zuleicae, external morphology and egg masses from Discovery Bay, Jamaica (A; March 2006); Little San Salvador, Bahamas (B–D, F, H; July 2007); or Bocas del Toro, Panama (E, G; December 2004). All measurements give body length of specimens. A, Specimen (8 mm) with light-colored rhinophores, parapodial margin and tail. B, Side view of specimen (12 mm) with dark maroon rhinophores, marginal bands of purple and brown on dark green parapodia, and thin, dark-colored tail. C, Top view of same specimen, showing parapodial margin, short renopericardial extension, and head. D, Ventral view of foot. E, Dorsal view with parapodia open, showing renopericardial complex, dorsal vessel network, and white gametic vesicles. F, Light-colored specimen (8 mm) with black speckling inside parapodia and on dorsal vessels. G, Light-colored juvenile (3 mm) with parapodia held flat against the substrate. H, Dark-colored juvenile (3 mm) with black marginal line. I, Planktotrophic egg mass laid by specimen from Jamaica, showing white ECY ribbon intercalated among early-stage embryos. Field of view = 2.1 mm. J, Lecithotrophic egg mass laid by specimen from Plana Cays, Bahamas, showing thick white ECY ribbon on upper inside face of egg mass, and encapsulated veliger larvae. Field of view = 6.8 mm. K, Lecithotrophic egg mass laid by specimen from Sweetings Cay, Bahamas, showing remnants of white ECY ribbon intercalated among encapsulated late-stage veliger larvae, close to the point of hatching. Field of view = 2.1 mm.
FIGURE 52 in Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region
FIGURE 52. Elysia zuleicae, schematic drawing of renopericardial complex and dorsal vessel network traced from photographs of three live specimens from Jamaica. Gray areas represent sperm-storage vesicles.
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.
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