Payraudeautia intricata (Donovan, 1804)

Huelsken, Thomas, Marek, Carina, Schreiber, Stefan, Schmidt, Iris & Mann, Michael Holl-, 2008, The Naticidae (Mollusca: Gastropoda) of Giglio Island (Tuscany, Italy): Shell characters, live animals, and a molecular analysis of egg masses, Zootaxa 1770, pp. 1-40 : 32-34

Payraudeautia intricata (Donovan, 1804) — Fig. 10A

Nerita intricata Donovan, 1804 . The natural history of British Shells. 5 Vols. 1799–1804. Vol. 5, pl. 167.

+ Natica valenciennesi Payraudeau, 1826 . Sabelli et al. (1990), p. 171

+ Natica grisea Requien, 1848 . Tryon (1886), p. 42; Sabelli et al. (1990), p. 171

Natica intricata (Donovan, 1804) . Weinkauff (1867), p. 255; Hidalgo (1917), p. 486–487

+ Payraudeautia similis Monterosato, 1884 . Sabelli et al. (1990), p. 171

+ Natica crassatella Locard, 1886 . Settepassi (1971), p. 19

Natica (Payraudeautia) intricata (Donovan, 1804) . Tryon (1886), p. 42; Kobelt (1901), p. 102, pl. 55, fig. 9–15; Settepassi (1972), p. 16, pl. 3

+ Payraudeautia peloritana Sulliotti, 1889 . Sabelli et al. (1990), p. 171

+ Payraudeautia alleryana Sulliotti, 1889 . Sabelli et al. (1990), p. 171

Payraudeautia intricata (Donovan, 1804) . Sabelli & Spada (1977), p. 10, pl. 3, fig. 8a–b; Schiró (1978a), fig. 1 (first row); Terreni (1981), p. 31; Nordsieck (1982), p.188, pl. 57 fig. 63.40; Poppe & Goto (1991), p. 120, pl. 18, fig. 4; Demir, (2002), p. 110, Barash & Danin (1992), pp. 106–107

Description

Size: Up to 19.7 mm height (“Mediterranean“; MNHN, Paris). Specimens (n = 15) from Giglio Island: 6.9`– 11.2 mm (mean: 8.8 ± 0.4 mm) height; 6.5–11.0 mm (mean: 8.58 ± 0.35 mm) width. Ratio [h/w] = 1.03 ± 0.007. Aperture approximately 80% of shell height.

General shape: Globose, solid, four spiral whorls [teleoconch: 2.25].

Sculpture: Minute axial growth striae.

Shell color: Light brown to light ash-colored, speckled with small, irregular white dots and short steaks; six spiral bands marked by reddish or brown arrowheads, evenly distributed across body whorl; first band below suture, topped by a wider band of wavy brown lines in some specimens; base white, with brown band bordering the umbilicus in some but not all specimens.

Protoconch: Uncolored whitish; 1.75 embryonal whorls.

Aperture & outer lip: Half moon-shaped aperture, slightly oblique, rounded at top and bottom; external lip simple.

Umbilical area: Deep umbilicus, wide open to apex, showing two well-spaced funicles; distinct parietal callus, at least partly brownish in most specimens.

Operculum: Corneous, honey-colored.

Animal: Propodium and mesopodium with irregular, densely packed reddish or brownish lines and spots on a whitish background; tentacles beige, their tips ash colored or brownish; propodium half the length of the shell, mesopodium is 1.5 times shell length, both equal in width; animal covers only small parts of shell with the mesopodium.

Differential diagnosis: The existence of two distinct funicles within the umbilicus is the most obvious and fail-safe distinguishing shell character for species identification.

Geographical distribution

Giglio Island: Pt. della Secche (3), Cala dell´Allume (4) between sea weeds of Posidonia oceanica . General distribution: Locally common in the entire Mediterranean Sea including the Aegean Sea ( Settepassi 1972, Schiró 1978) and the Sea of Marmara (Demir 2002). In the Atlantic, this species is found in the Lusitanic Sea and the Azores (Kobelt 1901, Hidalgo 1917, Settepassi 1970).

Figures

FIGURE 10: A, Payraudeautia intricata (Donovan, 1804); B, Neverita josephinia (Risso, 1826). Further details as in Figure 3. Scale bars represent 0.5 cm.