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8 results for “Bullacta”
Figure 6 in Systematics, phylogeny, and natural history of Bullacta exarata (Philippi, 1849): an endemic cephalaspidean gastropod from the China Sea
Figure 6. Central nervous system of Bullacta exarata (BMNH 20070443; shell height = 17 mm). Notes: cpg, cerebral-pleural ganglion; gg, genital ganglion; pag, parietal ganglion; peg, pedal ganglion; sbog, suboesophageal ganglion; spog, supraoesophageal ganglion; vg, visceral ganglion; scale bar, 1 mm.
Figure 8 in Systematics, phylogeny, and natural history of Bullacta exarata (Philippi, 1849): an endemic cephalaspidean gastropod from the China Sea
Figure 8. Scanning electron microscopy images of the gut content of specimens of Bullacta exarata collected from Tahé-Kiang, China. Diatoms are the only food items present. Notes: Scale bars, (A) 10 µm; (B) 20 µm.
Figure 5 in Systematics, phylogeny, and natural history of Bullacta exarata (Philippi, 1849): an endemic cephalaspidean gastropod from the China Sea
Figure 5. Gizzard plates of Bullacta exarata. (A) View of whole gizzard with plates (MNHN, Paris; shell height (H) = 18 mm); (B) top view of the central plate (MNHN, Paris; H = 18 mm); (C) lateral view of plate (MNHN, Paris; H = 17 mm); (D) detail of elements around the edge of plate ridges (MNHN, Paris; H = 17 mm). Notes: Scale bars, (A) 1 mm; (B, C) 200 µm; (D) 100 µm.
Figure 4 in Systematics, phylogeny, and natural history of Bullacta exarata (Philippi, 1849): an endemic cephalaspidean gastropod from the China Sea
Figure 4. Jaws and radula of Bullacta exarata. (A) Jaw (MNHN, Paris; height = 17 mm); (B) radula showing the long and sharp teeth (BMNH 20070443; shell height (H) = 17 mm); (C–D) radula with white arrowheads pointing to the toothless central area (C) and base of lateral teeth (D) (MNHN, Paris; H = 14 mm). Notes: Scale bars (A, C) 10 µm; (B) 100 µm; (D) 20 µm.
Figure 1 in Systematics, phylogeny, and natural history of Bullacta exarata (Philippi, 1849): an endemic cephalaspidean gastropod from the China Sea
Figure 1. Shell of Bullacta exarata. (A–B) Neotype (MNHN 4494, Paris; shell height (H) = 17 mm); (C) scanning electron microscope detail of dorsal part of shell showing spiral grooves (MNHN, Paris; H = 17 mm); (D) internal whorl showing the absence of columella; white arrowheads pointing to the folded cord of periostracum that results from the dissolution of the columella (MNHN, Paris; H = 17 mm). Note: Scale bar, (C) 200 µm.
Figure 2 in Systematics, phylogeny, and natural history of Bullacta exarata (Philippi, 1849): an endemic cephalaspidean gastropod from the China Sea
Figure 2. Male genital system of Bullacta exarata (MNHN, Paris, shell height = 17 mm). Notes: at, atrium; bc, blind caecum; ga, genital aperture; gr1, glandular region one; gr2, glandular region two; id, inwards duct; od, outwards duct; pr, prostate; ps, penial sheath; scale bar, 1 mm.
Figure 9 in Systematics, phylogeny, and natural history of Bullacta exarata (Philippi, 1849): an endemic cephalaspidean gastropod from the China Sea
Figure 9. Geographic distribution of Bullacta exarata.
Figure 3 in Systematics, phylogeny, and natural history of Bullacta exarata (Philippi, 1849): an endemic cephalaspidean gastropod from the China Sea
Figure 3. Male genital system of Bullacta exarata. (A) the muscular penis; white arrowhead pointing to apical hook (MNHN, Paris; height = 17 mm); (B) detail of apical hook (MNHN, Paris; height = 18 mm). Note: scale bars, 100 µm.
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