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197 results for “Neogastropoda”
Fig. 5 in Taxonomic status of genera of Buccininae (Neogastropoda, Buccinidae) updated based on molecular data with description of new species and corrections of nomenclature of Buccinum
Fig. 5. Buccinum bizikovi sp. nov. A–B. Holotype (ZIN 62781), SL 20.0 mm. C. Paratype (ZIN 62782), SL 20.0 mm, lateral view to show the penis. D. South-eastern Sakhalin, depth 78 m, SL 21.5 mm, ZIN 62783. E–F. Buccinum ovulum Dall, 1895 (ZIN 48103), Kurile Is, Iturup I., depth 605–620 m, SL 16.9 mm. G. Holotype (USNM 106997), Aleutian Is, Andreanof Is, Amukta Pass, depth 454 m, SL 25.6 mm. Photo G: courtesy of USNM.
Fig. 6 in Taxonomic status of genera of Buccininae (Neogastropoda, Buccinidae) updated based on molecular data with description of new species and corrections of nomenclature of Buccinum
Fig. 6. Buccinum hasegawai sp. nov. (A–C) and Buccinum bizikovi sp. nov. (D–F). A–B. Paratype (ZIN 62777), SL 16.5 mm. A. Radula. B. Operculum. C. Paratype (ZIN 62782), penis. D. Paratype (ZIN 62782), SL 16.5 mm, radula. E. Paratype (ZIN 62782), SL 19.1 mm, operculum. F. Paratype (ZIN 62782), SL 16.5 mm, penis. Scale bars: C, F = 1 mm.
Fig. 1 in Taxonomic status of genera of Buccininae (Neogastropoda, Buccinidae) updated based on molecular data with description of new species and corrections of nomenclature of Buccinum
Fig. 1. Part of the Bayesian phylogenetic tree of Buccinoidea Rafinesque, 1815 obtained with the cox- 1, 16S and 28S concatenated dataset representing family Buccinidae Rafinesque, 1815. The full tree is available as supplementary material (Supplementary file 1). Subfamily Siphonaliinae Finlay, 1928 is collapsed. Vertical numbered lines on the right mark the subfamilies of Buccinidae: 1 = Beringiinae Golikov & Starobogatov, 1975; 2 = Neptuneinae Stimpson, 1865; 3 = Volutopsinae Habe & Sato, 1973; 4 = Parancistrolepidinae Habe, 1972. Posterior probabilities and bootstrap values are shown for each medium supported node. Highly supported nodes are marked with black dots. The colors of the text refer to valid genus (orange = Volutharpa P. Fischer, 1856) and species referred to or morphologically attributable to formerly recognized (sub)genera of Buccininae: red = Thysanobuccinum Golikov & Gulbin in Golikov, 1980; blue = Ovulatibuccinum Golikov & Sirenko, 1988; green = Bathybuccinum Golikov & Sirenko, 1988.
Fig. 4 in Taxonomic status of genera of Buccininae (Neogastropoda, Buccinidae) updated based on molecular data with description of new species and corrections of nomenclature of Buccinum
Fig. 4. Buccinum hasegawai sp. nov. A–B. Holotype (ZIN 62775 (Buc274)), SL 18.5 mm. C. Paratype 1 (ZIN 62902 (Buc276)) from the type locality, SL 14.8 mm. D. Paratype 2 (MIMB 42300 (Buc273)), Urup I., 450–460 m, SL 14.7 mm. E. Paratype (ZIN 26228), Iturup I., 414 m, SL 16.1 mm. F. Paratype (ZIN 26228), Iturup I., 414 m, SL 16.2 mm, lateral view to show the penis. G. Buccinum bombycinum Dall, 1907 (ZIN 48100) Iturup I., 910–920 m, SL 15.3 mm. H–I. Syntype (USNM 1105311), Japan, Honshu I., Suruga Bay, 536 m, SL 23.9 mm. I = enlarged upper part of the shell to show the sculpture. Scale bars: A–H = same scale; I = 5 mm. Photos H–I: courtesy of USNM.
Fig. 2 in Taxonomic status of genera of Buccininae (Neogastropoda, Buccinidae) updated based on molecular data with description of new species and corrections of nomenclature of Buccinum
Fig. 2. Sequenced species of Buccinum Linnaeus, 1758 previously attributed to Thysanobuccinum Golikov & Gulbin in Golikov, 1980, Bathybuccinum Golikov & Sirenko, 1988 and Ovulatibuccinum Golikov & Sirenko, 1988. A–B. Buccinum tunicatum Golikov & Gulbin, 1977 (Buc265), Okhotsk Sea, off Urup I., depth 142 m, R/V Akademik Oparin, 56 cr., sta 7, SL 20.4 mm. C. Buccinum sp. 2 (Buc175), off Onagawa, Miyagi, Honshu I., Japan, depth 3302–3311 m, SL 20.3 mm. D–D'. Buccinum cf. tunicatum (Buc269), Okhotsk Sea coast of Urup I., 2 m, R/V Akademik Oparin, 56 cr., sta 26, SL 8.7 mm. D = at the same scale as others; D' = enlarged. E–E'. Buccinum bicordatum (Golikov & Sirenko, 1988) (Buc188), off Onagawa, Miyagi, Honshu I., Japan, depth 342–343 m, SL 8.4 mm. E = at the same scale as others; E' = enlarged. F. Buccinum unicordatum (Golikov & Sirenko, 1988) (Buc266), Kurile Is, Iturup I., Prostor Bay, depth 264–270 m, SL 15.9 mm. G. Buccinum chinoi nom. nov. (Buc190), off Onagawa, Miyagi, Honshu I., Japan, depth 342–343 m, SL 9.0 mm. H. Buccinum fimbriatum (Golikov & Sirenko, 1988) (Buc275), Kurile Is, Simushir I., depth 436 m, R/V Akademik Oparin, 56 cr., stn 19, SL 16.6 mm. I. Buccinum sp. 1 (Buc189), off Onagawa, Miyagi, Honshu I., Japan, depth 342–343 m, SL 22.4 mm. All shells (except D', E') at the same scale.
Fig. 3 in Taxonomic status of genera of Buccininae (Neogastropoda, Buccinidae) updated based on molecular data with description of new species and corrections of nomenclature of Buccinum
Fig. 3. Sequenced species of Buccinum Linnaeus, 1758, Volutharpa P. Fischer, 1856, and Plicibuccinum Golikov & Gulbin, 1977. A. Buccinum tenuisulcatum Golikov & Gulbin, 1977 (Buc264), Okhotsk Sea, Kurile Is, Onekotan I., depth 571–580 m, R/V Akademik Oparin, 56 cr., stn 68, SL 29.4 mm. B. Buccinum cyaneum Bruguière, 1789 (Buc281), Barents Sea, Teriberka Inlet, depth 10–17 m, SL 18.1 mm. C–D. Volutharpa ampullacea (Middendorff, 1848) (Buc277), Kurile Is, off Chirpoi I., depth 148–147 m, SL 14.1 mm. E. Buccinum nipponense Dall, 1907 (Buc187), off Otsuchi, Iwate, Honshu I., Japan, depth 479–484 m, SL 40.8 mm. F. Buccinum percrassum Dall, 1883 (Buc283), Kurile Is, Simushir I., 1–6 m, SL 33.5 mm. G–H. Buccinum cf. kobjakovae Golikov & Gulbin, 1977 (Buc278), Kurile Is, Simushir I., R/V Akademik Oparin, 56 cr., stn 19, 46°40.6′ N, 151°58.4′ E, depth 436 m, SL 12.1 mm. I. Plicibuccinum declivis (Habe & Ito, 1976) (Buc289), Japan Sea, Primorje, R/V Akademik Oparin, 64 cr., stn 73, 43°43.5′ N, 135°22.9′ E, depth 45–49 m, SL 36.2 mm. Shells not to scale.
Figs 29–33 in Review of Pugilina from the Atlantic, with description of a new species from Brazil (Neogastropoda, Melongenidae)
Figs 29–33. Pugilina tupiniquim: (29) pallial oviduct, ventral view, transversely sectioned; (30–31) pallial oviduct, ventral view, transversal cut; (32–33) nerve ring, ventral and dorsal view respectively. Scale bars = 2 mm.
Figs 4–5 in Review of Pugilina from the Atlantic, with description of a new species from Brazil (Neogastropoda, Melongenidae)
Figs 4–5. Pugilina morio: shell. (4) MNHN (a) dorsal, (b) apertural, and (c) apical view (L= 160 mm), scale bar = 9 mm; (5). MNHNP, (a) apertural, (b) dorsal and (c) apical view (L= 80 mm), scale bar = 5 mm.
Figs 1–3 in Review of Pugilina from the Atlantic, with description of a new species from Brazil (Neogastropoda, Melongenidae)
Figs 1–3. Pugilina tupiniquim: shell.(1) Holotype MZSP:73487, (a) apertural and (b) dorsal views (L= 120 mm); protoconch, (c) apical view, scale bar = 2 mm; (2) Paratype MZSP: 116299, (a) apertural, (b) dorsal and (c) apical view (L 80 mm), scale bar = 9 mm; (3) Paratype (a) dorsal, (b) apertural and (c) apical view (L = 110 mm), scale bar = 7 mm.
Figs 11–16 in Review of Pugilina from the Atlantic, with description of a new species from Brazil (Neogastropoda, Melongenidae)
Figs 11–16. Pugilina tupiniquim: (11) complete specimen extracted from shell, anterior-right view; (12) renopericardial region, ventral view, some adjacent structures also shown; (13) foot of female, sectioned longitudinally; (14) anterior foregut, ventral view; (15) pallial cavity hoof, ventral view; (16) pallial cavity roof, transverse section at middle level of osphradium. Scale bars = 2 mm.
Figs 23–28 in Review of Pugilina from the Atlantic, with description of a new species from Brazil (Neogastropoda, Melongenidae)
Figs 23–28. Pugilina tupiniquim: (23–24) odontophore, ventral view; (25) odontophore ventral view, left structures, partiallY deflected right; (26) detail from the right region of pallial cavity, male; (27) penis ventral view; (28) odontophore cartilage ventral view. Scale bars = 2 mm.
Figs 17–22 in Review of Pugilina from the Atlantic, with description of a new species from Brazil (Neogastropoda, Melongenidae)
Figs 17–22. Pugilina tupiniquim: (17) head and haemocoel, ventral view, foot and columellar muscle removed; (18) proboscis, medium and posterior oesophagus, ventral view; (19) visceral mass; (20) detail of medium oesophagus; (21) stomach longitudinal section; (22) stomach and associated structures, digestive gland removed. Scale bars = 2 mm.
Figs 6–10 in Review of Pugilina from the Atlantic, with description of a new species from Brazil (Neogastropoda, Melongenidae)
Figs 6–10. Pugilina tupiniquim and Pugilina morio radula, operculum and spawning: (6) P. tupiniquim MZSP: 91653, radula: (a) panoramic, (b) central and (c) lateral view, scale bars: (6a = 100 µm, 6b, c = 50 µm); (7) P. morio, MNHNP, radula, (a) panoramic, (b) central and (c) lateral view, scale bars: (7a = 100 µm, 7b, c = 30 µm); (8) P. tupiniquim, operculum (a) inner and (b) outer views, scale bar = 5 mm; (9) P. morio, operculum (a) inner and (b) outer views, scale bar = 5 mm; (10) Pugilina tupiniquim, spawning, scale bar = 5 mm.
Figs 34–38 in Review of Pugilina from the Atlantic, with description of a new species from Brazil (Neogastropoda, Melongenidae)
Figs 34–38. Pugilina tupiniquim and Pugilina morio: (34a) P. morio; (34b): P. tupiniquim, head, details of tentacles positions; (35a) P. morio; (35b) P. tupiniquim, mouth papilla; (36) P. morio, reno-pericardial region, ventral view, some adjacent structures also shown; (37) P. morio, anterior foregut ventral view; (38) P. tupiniquim, anterior foregut ventral view. Scale bars = 2 mm.
Figs 39–44 in Review of Pugilina from the Atlantic, with description of a new species from Brazil (Neogastropoda, Melongenidae)
Figs 39–44. Pugilina morio: (39) pallial oviduct, ventral view, transversal cut; (40) head and haemocoel, ventral view, foot and columellar muscle removed; (41) pallial cavity hoof, ventral view; (42) odontophore cartilage, ventral view, fused region detail, m4, m5 and m6 maintained; (43) pallial cavity roof, transverse section at middle level of osphradium; (44) penis ventral view. Scale bars = 2 mm.
Data from: Diversity and preserved shell coloration patterns of Miocene Conidae (Neogastropoda) from an exposure of the Gatun Formation, Colon Province, Panama
Extant members of the neogastropod family Conidae (cone snails) are renowned for their often dazzling shell coloration patterns and venomous feeding habits. Many cone snail species have also been described from the fossil record, but to date have been little used to understand the evolutionary history of extant clades. The cone snail fauna of the Miocene Gatun Formation of Colón Province, Panama is especially important for understanding the temporal and biogeographic history of tropical American Conidae. Intensive, focused collecting from an exposure of the lower Gatun Formation (deposited ca. 11-10 Ma) resulted in the discovery of nearly 900 specimens of Conidae. Remarkably, many of these well-preserved specimens exhibit revealed coloration patterns when exposed to ultraviolet light. The fluorescing coloration patterns were used in conjunction with other features of shell morphology to differentiate species and, in most cases, evaluate their potential relationships to members of the extant tropical American fauna. Nine species are fully described from this locality, one of which is recognized as new: Conus (Stephanoconus) woodringi n. sp. At least one, and perhaps more, Conidae species are also present at the study locality. The diversity of this Conidae fauna is considered moderate relative to other recently analyzed tropical American fossil assemblages. The phylogenetic diversity of the assemblage, however, is noteworthy: six of the ten species can be confidently assigned to six different clades of extant Conidae, providing potentially useful calibration points for future phylogenetic studies.
Data from: phylogenomics of the Neogastropoda: the backbone hidden in the bush
<p>The molluscan order Neogastropoda encompasses over 15,000 almost exclusively marine species playing important roles in benthic communities and in the economics of coastal countries. Neogastropoda underwent intensive cladogenesis in early stages of diversification, generating a 'bush' at the base of their evolutionary tree, that has been hard to resolve even with high throughput molecular data. In the present study we analyze a comprehensive exon capture dataset of 1,817 loci (79.6% data occupancy), comprising 112 taxa of 48 (out of 60) recent Neogastropoda families with a variety of phylogenetic inference methods to resolve their relationships. Our results show consistent topologies and high support in all analyses at (super)family level, supporting monophyly of Muricoidea, Mitroidea, Conoidea, and, with some reservations, Olivoidea and Buccinoidea. Volutoidea and Turbinelloidea as currently circumscribed are clearly paraphyletic. Despite our analyses consistently resolve most backbone nodes, three prove problematic. First, uncertain placement of Cancellariidae, as a sister group of either a Ficoidea-Tonnoidea clade, or of the rest of Neogastropoda, leaves monophyly of Neogastropoda unresolved. Second, relationships are contradictory at the base of the major grouping the 'core Neogastropoda'. Third, coalescence-based analyses reject monophyly of the Buccinoidea in relation to Vasidae. We analysed loci phylogenetic signal in relation with potential biases, and propose most probable resolutions in the two latter recalcitrant nodes. The uncertain placement of Cancellariidae may be explained by orthology violations due to the differential paralog loss short after the whole genome duplication, and should be resolved with a curated set of longer loci.</p>
Supplements for: Review and revision of the Olivoidea (Neogastropoda) from the Paleocene and Eocene of the U.S. Gulf Coastal Plain
<p>Numerous species of "oliviform" gastropods have been recognized in the Paleogene of the U.S. Gulf Coastal Plain, many of which have previously been allied to the "Bullia group" in the family Nassariidae, and placed in a variety of poorly-defined genera. We review these species, revise their generic and familial placement, and present a phylogenetic analysis. Of 19 species considered valid, all are assigned to Olivoidea, six to Olividae -- one to Oliva, five to Agaronia -- and the rest to Ancillariidae. The highly variable species Ancillaria altile Conrad, 1832 is referred in the genus Ancillopsis and appears to have evolved anagenetically over an interval of more than 15 million years. Ancillaria tenera Conrad, 1834a and Ancillaria scamba Conrad, 1832 are placed in the new genus Palmoliva. Monoptygma Lea, 1833 is demonstrated to belong to Ancillariidae, and to contain only a single species. Some specimens assigned to Lisbonia expansa Palmer, 1937 are split into adults assigned to Ancillopsis altilis and juveniles (together with several other species) in Anbullina elliptica (Whitfield, 1865). Coastal Plain ancillariids may have evolved from one or more species of the Cretaceous-Paleocene genus Eoancilla. We agree with previous authors who have suggested that the late Eocene species Oliva mississippiensis Conrad, 1848 is the earliest known representative of this genus and the subfamily Oliviinae, perhaps derived from a species of Agaronia. The oldest Agaronia is Lower Eocene (Ypresian).</p>
Figure 3. Cochlespira elegans syntype USNM 87397 in Two new species of deep water south Brazilian turriforms (Neogastropoda, Conoidea, Turridae and Cochlespiridae)
Figure 3. Cochlespira elegans syntype USNM 87397 (L 23 mm); (A) frontal view; (B) left view; (C) dorsal view.
Figure 1. Polystira tupan Holotype MZSP 156575 in Two new species of deep water south Brazilian turriforms (Neogastropoda, Conoidea, Turridae and Cochlespiridae)
Figure 1. Polystira tupan Holotype MZSP 156575 (L 76.1 mm): (A) apertural view; (B) right view; (C) dorsal view; (D) digital reconstitution of peristome based on growth lines, right view; (E) detail of sculpture of antepenultimate and penultimate whorls, scale = 5 mm.
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