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FIGURE 6 in Two new sacoglossan sea slug species (Opisthobranchia, Gastropoda): Ercolania annelyleorum sp. nov. (Limapontioidea) and Elysia asbecki sp. nov. (Plakobranchoidea), with notes on anatomy, histology and biology

FIGURE 6. Phylogeny of the Limapontiidae. ML analysis was performed on concatenated partial gene sequences of the nuclear 28S rDNA, the mitochondrial 16S rDNA, and the mitochondrial CO1 (first and second position only) loci. Support values are given. Numbers behind names indicate number of individuals included.

FIGURE 9 in Two new sacoglossan sea slug species (Opisthobranchia, Gastropoda): Ercolania annelyleorum sp. nov. (Limapontioidea) and Elysia asbecki sp. nov. (Plakobranchoidea), with notes on anatomy, histology and biology

FIGURE 9. Elysia asbecki sp. nov.: scanning electron microscopy and differential interference contrast microscopy of radula: (A) complete radula with leading tooth to the right. Ascus (lower limb, white arrow) lost during preparation. (B) – (D) different views of leading tooth; note the denticles. (E) Radula of same specimen. Note the small teeth and preradula teeth (black arrow) in ascus.

FIGURE 3 in Two new sacoglossan sea slug species (Opisthobranchia, Gastropoda): Ercolania annelyleorum sp. nov. (Limapontioidea) and Elysia asbecki sp. nov. (Plakobranchoidea), with notes on anatomy, histology and biology

FIGURE 3. Ercolania annelyleorum sp. nov.: scanning electron microscopy and differential interference contrast microscopy of radula: (A) complete radula of specimen 76 with leading tooth to the right. Ascus (white arrow) covered by thin cuticle. (B) – (D) different views of leading tooth. (E) Radula of specimen 71. Note the small teeth and pre-radula teeth (black arrow) in ascus.

FIGURE 5 in Two new sacoglossan sea slug species (Opisthobranchia, Gastropoda): Ercolania annelyleorum sp. nov. (Limapontioidea) and Elysia asbecki sp. nov. (Plakobranchoidea), with notes on anatomy, histology and biology

FIGURE 5. NeighborNet analysis of Limapontiidae based on mitochondrial CO1 sequences only without application of evolutionary models, performed with SplitsTree. Note the two distinct branches of Ercolania annelyleorum sp. nov.

FIGURE 2 in Two new sacoglossan sea slug species (Opisthobranchia, Gastropoda): Ercolania annelyleorum sp. nov. (Limapontioidea) and Elysia asbecki sp. nov. (Plakobranchoidea), with notes on anatomy, histology and biology

FIGURE 2. Ercolania annelyleorum sp. nov.: histology; (A) cross section in head area. Note the eyes laterally from the pharynx. (B) Cross section behind the head region. Note the large glandular structure below the ascus being part of the elaborate oral glands (arrow). (C) Longitudinal section of ceras with folded digestive gland. Note the dark dots representing chloroplasts in the epithelium of digestive gland. Large subepithelial glandular cells present, filled with acid mucopolysaccharides (arrows). (D) Detail of right lateral side with two cerata and one with an unidentified structure containing sperm (arrow). (E) Longitudinal section through penial sheath with muscular penis and ciliated vas deferens. Note insertion of hollow cuticular spine projecting into penial sheath (arrow). (F) Cross section in posterior half of body. Note the special glandular cells beneath the epidermis (arrows). Abbreviations: agl albumen gland, am ampulla, as ascus, bc bursa copulatrix, ca capsule gland, ce ceras, dgl digestive gland, fo foot, ga ganglion, go gonad, ki kidney, pe penis, pes penial sheath, ph pharynx, vd vas deferens.

FIGURE 4 in Two new sacoglossan sea slug species (Opisthobranchia, Gastropoda): Ercolania annelyleorum sp. nov. (Limapontioidea) and Elysia asbecki sp. nov. (Plakobranchoidea), with notes on anatomy, histology and biology

FIGURE 4. Ercolania annelyleorum sp. nov.: schematic outline of genital system, reconstructed from three different specimens. Agl albumen gland, am ampulla, bc bursa copulatrix, cgl capsule gland, mgl mucus gland, p penis, pr prostate gland, rs receptaculum seminis.

FIGURE 1 in Two new sacoglossan sea slug species (Opisthobranchia, Gastropoda): Ercolania annelyleorum sp. nov. (Limapontioidea) and Elysia asbecki sp. nov. (Plakobranchoidea), with notes on anatomy, histology and biology

FIGURE 1. Ercolania annelyleorum sp. nov.: living animals from Lizard Island; (A) Animal freshly isolated from food algae; length about 5 mm. (B) Animal after 1 day starvation. Note the characteristic dorsal red mark in the posterior third; length about 5 mm. Egg clutch visible on right side. (C) Juvenile starved for four days and now back on Boodlea; length about 2 mm. (D) One adult and two juveniles feeding on Boodlea. Note the egg clutch (arrow). (E) Two animals feeding on Boodlea.

Figure 6 in Sea slug night fever: 39 new records of elusive heterobranchs in the western Mediterranean (Mollusca: Gastropoda)

Figure 6. Photographs of live Sacoglossa species: (a) Hermaea bifida and close-up on its egg mass at the base of an alga. (b) Hermaea cantabra. (c) Hermaea paucicirra. (d) Limapontia capitata on Ulva lactuca. (e) Placida tardyi. (f) Placida viridis. (g) Elysia flava. Siphonariidae: (h) Williamia gussoni.

Figure 4 in Sea slug night fever: 39 new records of elusive heterobranchs in the western Mediterranean (Mollusca: Gastropoda)

Figure 4. Photographs of live Nudibranchia species: (a) The pelagic Phylliroe cf. bucephala. (b) Amphorina andra surrounded by hydrozoans of the genus Sertularella. (c) Eubranchus prietoi on the hydrozoan Kirchenpaueria halecioides. (d) The alien Godiva quadricolor. (e) Three specimens of Piseinotecus soussi and their egg masses. (f) Piseinotecus sphaeriferus on top of the hydrozoan Obelia sp. (g) Tenellia adspersa. (h) Trinchesia cuanensis on top of the hydrozoan Sertularella sp.

Figure 3 in Sea slug night fever: 39 new records of elusive heterobranchs in the western Mediterranean (Mollusca: Gastropoda)

Figure 3. Photographs of live Nudibranchia species: (a) Palio nothus and its egg mass. (b) The alien Polycera hedgpethi. (c) Polycerella emertoni and egg mass on Amathia verticillata. (d) Thecacera pennigera on top of the bryozoan Bugula sp. (e) Two specimens of Anteaeolidiella lurana and their egg masses. (f) Doto cervicenigra. (g) Doto fragilis (photo credit: Oriol Planas). (h) Doto pygmaea.

Figure 2 in Sea slug night fever: 39 new records of elusive heterobranchs in the western Mediterranean (Mollusca: Gastropoda)

Figure 2. Photographs of live Cephalaspidea species: (a) The alien Haloa japonica. (b) Haminoea orteai. (c) Egg mass of Haminoea orteai. (d) Philine catena. The Nudibranchia species: (e) Aegires palensis. (f) White morphotype of Aegires sublaevis. (g) Aldisa smaragdina on top of the sponge Phorbas topsenti. (h) Okenia longiductis on the bryozoan Amathia verticillata.

Figure 5 in Sea slug night fever: 39 new records of elusive heterobranchs in the western Mediterranean (Mollusca: Gastropoda)

Figure 5. Photographs of live Pteropoda species: (a) Creseis virgula. (b) Hyalocylis striata. (c) Peracle reticulata. (d) Pneumodermopsis canephora. Runcinida: (e) Runcina ornata. Sacoglossa: (f) Aplysiopsis elegans. (g) Caliphylla mediterránea. (h) Cyerce graeca.

Figure 1 in Sea slug night fever: 39 new records of elusive heterobranchs in the western Mediterranean (Mollusca: Gastropoda)

Figure 1. Distribution map of the western Mediterranean coast showing the main sampling stations. There should be only one image, currently there is a duplicate

Figure 19 in A cryptic radiation of Caribbean sea slugs revealed by integrative analysis: Cyerce 'antillensis' (Sacoglossa: Caliphyllidae) is six distinct species

Figure 19. Cyerce browneveorum, radular scanning electron micrographs of isolate 10Gei01; length of living animal, 5 mm. A, complete radula, with ascus. B, leading tooth. C, close-up view of discarded teeth in ascus.

Figure 18 in A cryptic radiation of Caribbean sea slugs revealed by integrative analysis: Cyerce 'antillensis' (Sacoglossa: Caliphyllidae) is six distinct species

Figure 18. Cyerce browneveorum, living specimen from Geiger Beach, Florida Keys (isolate 10Gei01); actual length, 5 mm.

Figure 16 in A cryptic radiation of Caribbean sea slugs revealed by integrative analysis: Cyerce 'antillensis' (Sacoglossa: Caliphyllidae) is six distinct species

Figure 16. Cyerce ellingsonorum, radular scanning electron micrographs of LACM 3841 (isolate 06JAM09). A, complete radula with ascus. B, close-up view of tissue-free teeth from ascending limb, showing rectangular denticles. C, close-up view of ascus.

Figure 15 in A cryptic radiation of Caribbean sea slugs revealed by integrative analysis: Cyerce 'antillensis' (Sacoglossa: Caliphyllidae) is six distinct species

Figure 15. Cyerce piercei, radular scanning electron micrographs of LACM 3843 (isolate 07Stir02). A, complete radula, with ascus attached to descending limb. B, leading tooth. C, close-up view of ascus, slightly damaged.

Figure 14. Cyerce piercei, live specimens. A, B in A cryptic radiation of Caribbean sea slugs revealed by integrative analysis: Cyerce 'antillensis' (Sacoglossa: Caliphyllidae) is six distinct species

Figure 14. Cyerce piercei, live specimens. A, B, dorsal views of specimen collected on Penicillus lamourouxii in Tarpon Springs, FL, USA; actual size, 9 mm. A, photographed with lighting from above. B, photographed with oblique lighting. C, D, dorsal view of specimen collected on Udotea looensis at 15 m depth from Mary's Ledge reef, offshore of St. Petersburg, FL, USA; actual size, 7 mm. C, photographed with lighting from above. D, photographed with oblique lighting.

Figure 12 in A cryptic radiation of Caribbean sea slugs revealed by integrative analysis: Cyerce 'antillensis' (Sacoglossa: Caliphyllidae) is six distinct species

Figure 12. Live specimens of Cyerce nicholasi. A, specimen from Penicillus dumetosus in Sweetings Cay, Bahamas (isolate 07Swe01); actual body length, 4 mm. B, specimen from Rhipocephalus phoenix in Bimini, Bahamas (isolate 10Bim02); actual body length, 3 mm preserved. C, specimen from Pe. dumetosus in Bocas del Toro, Panama (isolate 15Pan02); actual body length, 5 mm. D, alternative view of specimen 15Pan02, showing brown lines along ceratal margin.

Figure 10. Cyerce antillensis, radular scanning electron micrographs for isolates 10Bim01 in A cryptic radiation of Caribbean sea slugs revealed by integrative analysis: Cyerce 'antillensis' (Sacoglossa: Caliphyllidae) is six distinct species

Figure 10. Cyerce antillensis, radular scanning electron micrographs for isolates 10Bim01 (A–C) and MM109A (LACM 2004-04-9A; D, E). A, complete radula, including ascus, from isolate 10Bim01. B, leading tooth. C, close-up of ascus. D, complete radula from isolate MM109A; ascus not present. E, close-up of inset box, showing teeth on ascending limb.