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939 results for “Nudibranchia”
Figure 39. Paradoris indecora. A in A taxonomic revision of Paradoris sea slugs (Mollusca, Gastropoda, Nudibranchia, Doridina)
Figure 39. Paradoris indecora. A, remaining pieces of the reproductive system, holotype of ceneris, scale = 2.3 mm. B, prostate, holotype of ceneris, scale = 1.6 mm. C, nervous system, dorsal view, holotype of inversa, scale = 1.4 mm. D, remaining pieces of the reproductive system, holotype of inversa, scale = 2.4 mm.
Figure 28. Paradoris erythraeensis, CASIZ 109846. A in A taxonomic revision of Paradoris sea slugs (Mollusca, Gastropoda, Nudibranchia, Doridina)
Figure 28. Paradoris erythraeensis, CASIZ 109846. A, dorsal notum, scale = 100 µm. B, dorsal notum, scale = 20 µm. C, wide hole, scale = 10 µm. D, median jaw, scale = 100 µm. E, jaw rodlets, scale = 10 µm. F, jaw rodlets, scale = 20 µm.
Figure 2 in A taxonomic revision of Paradoris sea slugs (Mollusca, Gastropoda, Nudibranchia, Doridina)
Figure 2. Strict consensus tree of 1733 equally parsimonious trees of 22 steps. Outgroups (other discodorids, Geitodoris) are indicated in smaller font than Paradoris species and specimens. Numbers indicate the Bremer support values.
Figure 32 in A taxonomic revision of Paradoris sea slugs (Mollusca, Gastropoda, Nudibranchia, Doridina)
Figure 32. Paradoris erythraeensis, reproductive system, CASIZ 109846. A, general view (rs moved), scale = 1 mm. B, general view, scale = 1 mm.
Figure 25. Paradoris erythraeensis. A in A taxonomic revision of Paradoris sea slugs (Mollusca, Gastropoda, Nudibranchia, Doridina)
Figure 25. Paradoris erythraeensis. A, left, outermost teeth, MNHN-Amer #2, scale = 20 µm. B, right rows, CASIZ 099390, scale = 20 µm. C, left, outermost teeth, CASIZ 099390, scale = 10 µm. D, right, outermost teeth, CASIZ 099390, scale = 20 µm. E, right, innermost teeth, CASIZ 157029, scale = 10 µm. F, right rows, CASIZ 157029, scale = 30 µm.
Figure 38. Paradoris indecora, reproductive system. A in A taxonomic revision of Paradoris sea slugs (Mollusca, Gastropoda, Nudibranchia, Doridina)
Figure 38. Paradoris indecora, reproductive system. A, remaining pieces of the distal part, with two accessory glands and three stylet sacs (only two sacs visible on this side), syntype #5 of granulata, scale = 0.85 mm. B, remaining pieces of the distal part, with two accessory glands and three stylet sacs (only two sacs visible on this side), syntype #5 of granulata, scale = 0.85 mm. C, remaining pieces of the distal part, with one accessory gland and three stylet sacs, syntype #6 of granulata, scale = 0.6 mm. D, remaining pieces of the distal part, with one accessory gland and three stylet sacs (only two sacs visible on this side), syntype #6 of granulata, scale = 0.6 mm.
Figure 35. Paradoris indecora, dorsal notum. A in A taxonomic revision of Paradoris sea slugs (Mollusca, Gastropoda, Nudibranchia, Doridina)
Figure 35. Paradoris indecora, dorsal notum. A, syntype #3 of granulata, scale = 300 µm. B, syntype #3 of granulata, scale = 30 µm. C, holotype of ceneris, scale = 20 µm. D, holotype of ceneris, scale = 10 µm. E, holotype of inversa, scale = 100 µm. F, holotype of inversa, scale = 10 µm.
Figure 24. Paradoris erythraeensis. A in A taxonomic revision of Paradoris sea slugs (Mollusca, Gastropoda, Nudibranchia, Doridina)
Figure 24. Paradoris erythraeensis. A, radular rows, CASIZ 074477 #1, scale = 100 µm. B, innermost radular teeth, CASIZ 074477 #1, scale = 30 µm. C, radular rows, CASIZ 074477 #2, scale = 20 µm. D, right, outermost teeth, CASIZ 074477 #2, scale = 20 µm. E, left, outermost teeth, CASIZ 074477 #2, scale = 10 µm. F, left, lateral teeth, CASIZ 074477 #2, scale = 10 µm.
Figure 42. Paradoris indecora, jaw rodlets. A in A taxonomic revision of Paradoris sea slugs (Mollusca, Gastropoda, Nudibranchia, Doridina)
Figure 42. Paradoris indecora, jaw rodlets. A, ZMUC #1, scale = 30 µm. B, ZMUC #1, scale = 10 µm. C, MNCN, scale = 10 µm. D, ZMUC #2, scale = 10 µm.
Figure 34. Paradoris indecora. A in A taxonomic revision of Paradoris sea slugs (Mollusca, Gastropoda, Nudibranchia, Doridina)
Figure 34. Paradoris indecora. A, granulation on the dorsal notum, with pigments, syntype #4 of granulata, scale = 1.8 mm. B, grooved oral tentacle, holotype of indecora, scale = 0.5 mm. C, granulation on the dorsal notum, holotype of indecora, scale = 1.3 mm. D, nervous system, dorsal view, syntype #5 of granulata, scale = 1.8 mm.
Figure 27. Paradoris erythraeensis, reproductive system. A in A taxonomic revision of Paradoris sea slugs (Mollusca, Gastropoda, Nudibranchia, Doridina)
Figure 27. Paradoris erythraeensis, reproductive system. A, general view, CASIZ 099390, scale = 1 mm. B, distal part with two accessory glands and two stylet sacs, CASIZ 099390, scale = 0.45 mm. C, spermatic pouches and ducts, CASIZ 099390, scale = 0.9 mm. D, distal part with two possible stylet sacs (only one sac visible on this side), CASIZ 074477 #2, scale = 0.6 mm. E, distal part with two possible stylet sacs, CASIZ 074477 #2, scale = 0.6 mm. F, general view (only one stylet sac visible), CASIZ 074477 #1, scale = 1.5 mm. G, distal part with two accessory glands and two stylet sacs, CASIZ 074477 #1, scale = 0.9 mm.
Figure 46. Paradoris liturata, dorsal notum. A, CASIZ 097595 in A taxonomic revision of Paradoris sea slugs (Mollusca, Gastropoda, Nudibranchia, Doridina)
Figure 46. Paradoris liturata, dorsal notum. A, CASIZ 097595 #1, scale = 200 µm. B, CASIZ 097595 #1, scale = 20 µm.
Figure 20. Paradoris erythraeensis. A in A taxonomic revision of Paradoris sea slugs (Mollusca, Gastropoda, Nudibranchia, Doridina)
Figure 20. Paradoris erythraeensis. A, dorsal notum, SAM A32370, scale = 100 µm. B, dorsal notum, CASIZ 074477 #1, scale = 100 µm. C, dorsal notum, CASIZ 157029, scale = 100 µm. D, dorsal notum, CASIZ 099390, scale = 100 µm. E, dorsal notum, CASIZ 099390, scale = 20 µm. F, surface of a branchial plume, CASIZ 099390, scale = 20 µm. G, copulatory organ, CASIZ 099390, scale = 20 µm.
Figure 17 in A phylogenetic analysis and systematic revision of the cryptobranch dorids (Mollusca, Nudibranchia, Anthobranchia)
Figure 17. Discodoris zibethina (ZMUC GAS-2112). dorsal view of the preserved holotype.
Multiple Doris kerguelenensis (Nudibranchia) species span the Antarctic polar front
<p>Despite strong historical biogeographical links between benthic faunal assemblages of the Magellan region of South America and the Antarctic Peninsula, very few studies have documented contemporary movement and gene flow in or out of the Southern Ocean, especially across the Antarctic Polar Front (APF). In fact, oceanographic barriers such as the APF and Antarctica's long geologic isolation have substantially separated the continents and facilitated the evolution of endemic marine taxa found within the Antarctic region. The Southern Ocean benthic sea slug complex, Doris 'kerguelenensis', are a group of direct-developing, simultaneous hermaphrodites that lack a dispersive larval stage. To date, there are 59 highly divergent species known within this complex. Here we provide evidence to show intraspecific genetic connectivity occurs across the Antarctic Polar Front for multiple species within the Doris 'kerguelenensis' nudibranch species complex. We addressed questions of genetic connectivity by examining the phylogeographic structure of the three best-sampled Doris 'kerguelenensis' species and another three trans-Antarctic Polar Front species using the protein coding mtDNA gene, Cytochrome Oxidase I. We also highlight alternative refugia uses among species with the same life history traits (i.e., benthic, direct developers) and for some species, extremely large distributions are established (e.g., circumpolarity). By improving our sampling of these nudibranchs, we gain better insight into the population structure and connectivity of the Antarctic region. This work also demonstrates how difficult it is to make generalisations across Antarctic marine species, even among ecologically-similar, closely-related species.</p>
Fig. 8 in Revealing morphological characteristics of Goniodorididae genera (Mollusca: Nudibranchia)
Fig. 8 Dichotomous key of Goniodorididae genera
Figure. Armina maculata: dorsal and ventral views of the specimen. in Armina maculata Rafinesque, 1814 (Nudibranchia: Arminidae): a new record for the Turkish mollusc fauna
Figure. Armina maculata: dorsal and ventral views of the specimen.
FIG. 6 in On the phanerobranch dorids of Angola (Mollusca, Nudibranchia): a crossroads of temperate and tropical species
FIG. 6. — Polycera hedgpethi (MNHN), dorsal view of the living animal. Scale bar: 1 mm.
FIG. 2 in On the phanerobranch dorids of Angola (Mollusca, Nudibranchia): a crossroads of temperate and tropical species
FIG. 2. — Okenia digitata (MNHN), dorsal view of the living animal. Scale bar: 1 mm.
FIG. 1 in On the phanerobranch dorids of Angola (Mollusca, Nudibranchia): a crossroads of temperate and tropical species
FIG. 1. — Okenia cf. amoenula (MNHN), dorsal view of the living animal. Scale bar: 1 mm.
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International Brain Laboratory public data
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OpenNeuro
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