Find research datasets worth reusing

Figure 7 in A new fossil Euspira? (Mollusca: Gastropoda: Naticidae) from the Gubik Formation on the North Slope of Arctic Alaska

Figure 7. Depth data for selected species, showing the majority of recovered species co-occur between 20 and 50 m with a few taxa occurring shallower and some occurring deeper.

Figure 6 in A new fossil Euspira? (Mollusca: Gastropoda: Naticidae) from the Gubik Formation on the North Slope of Arctic Alaska

Figure 6. Map showing generalized occurrences of Euspira? louiemarincovichi along the northern coastal plain of Alaska. These occurrences are concentrated in three areas: adjacent to the Colville River (southern eastern occurrences), near and along the Kogru River/Teshekpuk Lake (northern eastern occurrences), and along Skull Cliff (occurrences southwest of Barrow to the west). Not all collections are represented in this figure, just enough to determine the general geographic areas where this new species occurs. Some addition geographic names are mentioned to help interpret the geographic ranges of some gastropods.

Figures 1–4 in A new fossil Euspira? (Mollusca: Gastropoda: Naticidae) from the Gubik Formation on the North Slope of Arctic Alaska

Figures 1–4. Euspira? louiemarincovichi n. sp. UCMP holotype 123663, UCMP locality IP23235 (USGS M7346). Bar = 1 cm. 1. Aperical view, 2. Apical view, 3. Umbilical view, 4. Inclined side view. Photographs by Dave Strauss, UCMP.

Figure 5 in A new fossil Euspira? (Mollusca: Gastropoda: Naticidae) from the Gubik Formation on the North Slope of Arctic Alaska

Figure 5. Close–up of spiral and radial sculpture on the body whorl of the holotype specimen. Field of view approximately 0.5 cm. Blue arrow indicates radial sculpture, red arrow indicates spiral sculpture. angle of the aperture is acute and points towards the apex. A deep, partially open umbilicus is present, but is obscured in part by the umbilical callus making it tear– drop shaped.

Table 1 in A new fossil Euspira? (Mollusca: Gastropoda: Naticidae) from the Gubik Formation on the North Slope of Arctic Alaska

Table 1. Correction of Pliocene and Pleistocene marine transgressions of western and northern Alaska (after Marincovich and Powell, 1991).<table><tbody><tr><th>Age (Hopkins 1965, 1967, Carter et al. 1986)</th><th>Bering Sea (Kaufman et al. 1989, Hopkins, written common., 1990 in Marincovich and Powell 1991)</th><th>Western and northern Alaska (Brouwers et al. 1984)</th><th>Skull Cliff (northwest Alaskan coast) (Brigham 1985, these units are all informal)</th><th>Arctic Coastal Plain (Carter et al. 1986)</th></tr></tbody><tbody><tr><th><4 ka</th><td>Krusensternian</td><td>Flandrian</td><td>—</td><td>Flandrian</td></tr><tr><th>circa. 25 ka</th><td>—</td><td>—</td><td>—</td><td>Middle Wisconsin</td></tr><tr><th>90–105 ka</th><td>—</td><td>Flaxsman Fm.</td><td>—</td><td>Simpsonian</td></tr><tr><th>120–130 ka</th><td>Pelukian</td><td>Pelukian</td><td>Walakpa beds</td><td>Pelukian</td></tr><tr><th>circa. 500 ka</th><td>Anvilian</td><td>Kotzebuan</td><td>Karmuk beds</td><td>Wainwrightian</td></tr><tr><th>>1.5 Ma, <2.4 Ma</th><td>Beringian III</td><td>Fishcreekian</td><td>Tuapaktushak beds</td><td>Fishcreekian</td></tr><tr><th>>2.4 Ma</th><td>Beringian II</td><td>Anvilian</td><td>Killi Creek beds</td><td>Bigbendian</td></tr><tr><th><3.5 Ma</th><td>Beringian I</td><td>Beringian</td><td>Nulavik beds</td><td>Colvillian</td></tr></tbody></table>

FIG. 12 in Taxonomic study on the molluscs collected during the Marion-Dufresne expedition (MD55) off SE Brazil: the Naticidae (Mollusca: Caenogastropoda)

FIG. 12. — Cladogram of Simone (2011) with insertion of the three species of Microlinices n. gen., studied anatomically herein. Below the summary cladogram of that paper, with each node named and numbered. Upper panel shows a detail of the portion of the cladogram focusing the species studied here, with nodes sequentially numbered (in parenthesis the original node in Simone 2011: fig. 20).

FIG. 10 in Taxonomic study on the molluscs collected during the Marion-Dufresne expedition (MD55) off SE Brazil: the Naticidae (Mollusca: Caenogastropoda)

FIG. 10. — Shells and operculum of MD55 naticid species; A, B, Natica juani Costa & Pastorino, 2012, shell MNNH (sta. DC82): A, dorsal view; B, apertural view; C, D, collected isolated operculum of a Natica ss; C, outer view; D, inner view; E-K, Eunaticina abyssalis n. sp. holotype: E, frontal view; F, dorsal view; G, apical view; H, umbilical view; I, detail of apex; J, protoconch, apical view; K, detail of superficial sculpture in middle level of body whorl. Measurements: A, B, W 3.0 mm; C, D, 14.4 × 8.3 mm; E-H, W 26.6 mm; I, K, 1.0 mm; J, 1.6 mm.

FIG. 8 in Taxonomic study on the molluscs collected during the Marion-Dufresne expedition (MD55) off SE Brazil: the Naticidae (Mollusca: Caenogastropoda)

FIG. 8. — Shells of MD55 naticid species: A-B, Microlinices ombratus n. gen., n. sp. shell of holotype: A, frontal view; B, dorsal view; C-G, Microlinices apiculus n. gen., n. sp.: C-F, holotype: C, apertural view; D, dorsal view; E, right view; F, apical view; G, paratype MZSP 105146; H-K, Microlinices gaiophanis n. gen., n. sp., holotype MNHN: H, apertural view; I, dorsal view; J, right view; K, apical view. Measurements: A, B, W 3.2 mm; C-F, W 5.3 mm; G, W 4.4 mm; H-K, W 5.2 mm.

FIG. 11 in Taxonomic study on the molluscs collected during the Marion-Dufresne expedition (MD55) off SE Brazil: the Naticidae (Mollusca: Caenogastropoda)

FIG. 11. — Radulae in SEM: A, B, Microlinices benthovus n. gen., n. sp.; C, radula of other specimen; D, M. latiusculus n. gen., n. sp.; E, same of other specimen; F, G, Microlinices ibitingus n. gen., n. sp. Scale bars: A, C, D, F, G, 20 µm; B, 50 µm; E, 10 µm.

FIG. 7. — Microlinices benthovus n. gen., n in Taxonomic study on the molluscs collected during the Marion-Dufresne expedition (MD55) off SE Brazil: the Naticidae (Mollusca: Caenogastropoda)

FIG. 7. — Microlinices benthovus n. gen., n. sp., anatomy:A, B, head-foot, frontal view:A, female; B, male; C, pallial cavity hoof, female, transverse section in middle level of osphradium; D, penis, ventral view, some adjacent structures also shown; E, pallial cavity roof and visceral mass, ventral view, digestive gland portion ventral to stomach and ventral region of pericardium removed; F, foregut, left view; G, odontophore, dorsal view, superficial layer of muscles and membranes removed, both odontophore cartilages deflected, radular sac only partially shown; H, nerve ring, ventral view. Abbreviations: see Material and methods. Scale bars: 0.5 mm.

FIG. 3. — Microlinices latiusculus n. gen., n in Taxonomic study on the molluscs collected during the Marion-Dufresne expedition (MD55) off SE Brazil: the Naticidae (Mollusca: Caenogastropoda)

FIG. 3. — Microlinices latiusculus n. gen., n. sp. anatomy: A-C, odontophore: A, dorsal view, oral tube and some superficial muscles removed; B, ventral view; C, dorsal view, superficial layer of muscles and membranes removed, both odontophore cartilages deflected; D, head, male, ventral view, foot removed; E, nerve ring, ventral view. Abbreviations: see Material and methods. Scale bars: 0.5 mm.

FIG. 2. — Microlinices latiusculus n. gen., n in Taxonomic study on the molluscs collected during the Marion-Dufresne expedition (MD55) off SE Brazil: the Naticidae (Mollusca: Caenogastropoda)

FIG. 2. — Microlinices latiusculus n. gen., n. sp. anatomy; A-C, head-foot, male: A, frontal view; B, dorso-posterior view; C, ventral view (foot sole); D, pallial cavity roof and last whorl of visceral mass, ventral view, digestive gland portion ventral to stomach and ventral region of pericardium removed; E, foregut, left view, transverse section of indicated region of esophageal gland shown; F, head and haemocoel, ventral view, foot removed; G, H, buccal mass, right view, odontophore partially deflected. Abbreviations: see Material and methods. Scale bars: 0.5 mm.

FIG. 4. — Microlinices ibitingus n. gen., n in Taxonomic study on the molluscs collected during the Marion-Dufresne expedition (MD55) off SE Brazil: the Naticidae (Mollusca: Caenogastropoda)

FIG. 4. — Microlinices ibitingus n. gen., n. sp., shell holotype: A, frontal view; B, right view; C, dorsal view; D, umbilical-slightly apertural view; E, apical view; F, detail of apex; G, operculum of specimen (sta. CB93), outer view. Measurements: A-F, W 10.1 mm; G, L 2.9 mm.

FIG. 6. — Microlinices benthovus n. gen., n in Taxonomic study on the molluscs collected during the Marion-Dufresne expedition (MD55) off SE Brazil: the Naticidae (Mollusca: Caenogastropoda)

FIG. 6. — Microlinices benthovus n. gen., n. sp.: A-F, holotype: A, apertural view; B, right view; C, dorsal view; D, umbilical-slightly apertural view; E, apical view; F, detail of apex; G, H, operculum of paratype MNHN, 1 ♀: G, outer view; H, inner view; I, paratype MNHN, 1 ♀, apertural view, specimen still inside; J, paratype MZSP 105270, apertural view. Measurements: A-F, W 3.8 mm; G, H, 3.2 × 2.2 mm; I, W 4.8 mm; J, W 3.4 mm.

FIG. 5. — Microlinices ibitingus n. gen., n in Taxonomic study on the molluscs collected during the Marion-Dufresne expedition (MD55) off SE Brazil: the Naticidae (Mollusca: Caenogastropoda)

FIG. 5. — Microlinices ibitingus n. gen., n. sp., anatomy: A, pallial cavity roof, ventral view; B, same structure, transverse section on middle level of osphradium; C, head and haemocoel, ventral view, foot removed; D, nerve ring, ventral view; E, foregut as in situ, right-slightly ventral view, topology of nerve ring also shown; F, same structure, most structures uncoiled, right view. Abbreviations: see Material and methods. Scale bars: 0.5 mm.

FIG. 9 in Taxonomic study on the molluscs collected during the Marion-Dufresne expedition (MD55) off SE Brazil: the Naticidae (Mollusca: Caenogastropoda)

FIG. 9. — Shells of MD55 naticid species: A-E, Natica jukyriuva n. sp., shell holotype: A, apertural view; B, right view; C, dorsal view; D, apical view; E, detail of apex; F-I, Natica pipoca n. sp., shell, holotype: F, apertural view; G, dorsal view; H, apical view; I, operculum, outer view. Measurements: A-D, W 9.2 mm; E, side, 2.5 mm; F-H, W 2.1 mm; I, 1.4 × 0.9 mm.

FIG. 1. — Microlinices latiusculus n. gen., n in Taxonomic study on the molluscs collected during the Marion-Dufresne expedition (MD55) off SE Brazil: the Naticidae (Mollusca: Caenogastropoda)

FIG. 1. — Microlinices latiusculus n. gen., n. sp.: A-D, holotype MNHN; A, apertural-slightly umbilical view; B, dorsal view; C, apical view; D, umbilical view; E, paratype MNHN (sta. 104), apertural view; F-H, another more globose specimen (sta. 104): F, apertural view; G, operculum, outer view; H, inner view; I, statocyst in SEM; J, K, radula in SEM extracted from dry specimen. Measurements: A-D, W 4.1 mm; E, W 4.3 mm; F, W 3.7 mm; G, H, W 2.5 mm; I, W 0.1 mm. Scale bars: J, 20 µm; K, 10 µm.

FIG. 13 in Taxonomic study on the molluscs collected during the Marion-Dufresne expedition (MD55) off SE Brazil: the Naticidae (Mollusca: Caenogastropoda)

FIG. 13. — Cladogram of Simone (2011) focusing on the region where the three species studied anatomically here are nested. The remaining cladogram is identical to Simone (2011: fig 20) and, therefore, it is not shown. The numbers of the nodes, characters, states and symbols are as in that paper; above numbers in symbols are characters, numbers below are states. Steps 3101, consistency index 51; retention index 94. Symbols: ¢, non-homoplastic synapomorphy; £, reversions; , convergences.