Neverita duplicata ( Say, 1822 )

Hülsken, Thomas, Clemmensen, Marina & Hollmann, Michael, 2006, Neverita delessertiana (Récluz in Chenu, 1843): a naticid species (Gastropoda: Caenogastropoda) distinct from Neverita duplicata (Say, 1822) based on molecular data, morphological characters, and geographical distribution, Zootaxa 1257, pp. 1-25 : 16-17

Neverita duplicata ( Say, 1822)

Natica duplicata Say, 1822 , p. 247­248.

+ Natica campechiensis Récluz in Chenu, 1843, Natica pl. 4, figs. 2, 2a. See Fig. 1 L.

+ Natica listeri Philippi, 1850 , p. 83, pl. 12, fig. 11 [plate published in 1850, text in 1851 ( Smith & England 1937)].

See Fig. 1 O.

+ Natica campeachiensis Reeve, 1855 ex Récluz MS, pl. 1, figs. 1a, 1b (possibly emendation of Natica campechiensis Récluz in Chenu, 1843). See Fig. 1 K.

Polinices duplicatus ( Say, 1822) . Porter 1974, p. 187.

not Neverita duplicata ( Say, 1822) . Kabat et al. 1997, p. 19 [is Neverita delessertiana Récluz in Chenu, 1843].

Type localities:

Natica duplicata Say, 1822 – “Coast of the United States “ ( Say 1822: 247). Natica campechiensis Récluz in Chenu, 1843; Natica campeachiensis Reeve, 1855 ex

Récluz MS ­ Campeachy Bay, Gulf of Mexico ( Kabat et al. 1997). Natica listeri Philippi, 1850 – „e sinu Campeche – der mexikanische Meerbusen“ (Philippi

1849­53: 83).

Type material:

Natica duplicata Say, 1822 – „Cabinet of the Academy and Philadelphia Museum“ ( Say 1822: 247). According to Virginia Orr Maes, quoted in Mikkelsen & Mikkelsen (1984), Say’s collection and types, which were originally present at the ANSP, were removed in 1825 to New Harmony, Indiana, where many were later destroyed in a fire. The remainder was returned to the ANSP in 1884. However, N. duplicata could not be found at the ANSP (G. Rosenberg in litt., 03.04.1998).

Natica campechiensis Récluz in Chenu, 1843; Natica campeachiensis Reeve, 1855 ex Récluz MS – 3 syntypes, BMNH 1988039 ( Kabat et al. 1997).

Natica listeri Philippi, 1850 – Unknown. Not at ZMB ( Kabat & Kilias 1991).

Description: Shell of N. duplicata on average thicker, larger in diameter, more compact than N. delessertiana ( Figs. 4 A–C); color of shell light to dark grey with dark apex; surface of whorls sculptured with minute, closely arranged transverse growth striae; darker colored band revolves around the spire below the suture, becoming gradually fainter, broader towards aperture; aperture ovate, large, highly oblique; umbilicus large, wide open, centered by broad funicle ending in massive button­like funicular callus; umbilicus partly covered by big, well­rounded callus connecting to rather thin anterior lobe of parietal callus; color of funicular callus mostly brownish, occasionally white or pinkish, depending on diet (Turner 1958).

Figures

FIGURE 4: Typical shells of Neverita duplicata (A­C), and Neverita delessertiana (D­F). The umbilical areas are shown enlarged in C and F. The ridge (keel) within the umbilical channel (closed arrows in D and F) of N. delessertiana is present in all specimens investigated. Additionally, the shape of the umbilical callus often differs between the two species [open arrows in C and F]. The callus of N. delessertiana in most specimens is more triangular (F) while that of N. duplicata is more rounded (C).