Fasciolaria tephrina De &amp; Souza 2002, sp. nov.
Creators: name: De, Paulino J. S.
name: Souza
Publisher: name: Zenodo
Year: 2002
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Neogastropoda
Fasciolariidae
Fasciolaria
Fasciolaria tephrina

description: <i>Fasciolaria tephrina</i> sp. nov. Fig. 1­5 Type material: Holotype (fig. 1­3): MZSP 35048 (length 187.4 mm, width 73.8 mm). Type locality: North of Quita Sueño Bank, Colombia (off Nicarágua), 14 º 40 ’ N 81 º 25 ’ W, 480 m, viii. 1957 (fig. 12). Paratype (fig. 4) MNRJ 8668 (length 160.1 mm, width 70.9 mm) this shell has the protoconch missing and the siphonal canal partially broken, from type locality. Other Material: KSC (fig. 5) off Roatan Isl., Honduras, 420 m, collected in fish trap (length 155 mm, width 68. 4 mm). Diagnosis: Large bathyal species, with ashen white surface lacking spiral grooves, long siphonal canal, large deviated protoconch. Description: Shell large, fusiform, spire high. Surface somewhat glossy, ashen white in color, marked with axial growth lines, sculptured by 4 or 5 spiral grooves on concave area just anterior to suture. Protoconch (fig. 3) large (approximately 5.5 mm in height), paucispiral, deviated, rounded with 1 whorl. Teleoconch with 7 highly convex whorls, early whorls with obsolete wide ribs (10 on first whorl) and 4 spiral cords, gradually fading, disappearing at 4 th whorl; very faint spiral grooves appearing on the final third of body whorl. Aperture slightly prosocline posteriorly, otherwise orthocline, rounded, wide, internally glossy with cream colored enamel; outer wall with numerous, thin, weak lirae; outer lip unthickened with 6 weak, posteriorly set denticles. Parietal wall smooth; columella with 2 moderately strong, oblique plications, not apparent at aperture; anteriormost plication blending with the inner lip of siphonal canal. Siphonal canal very long (24.6 % of total shell length), open, slightly sinuous. Discussion: <i>Fasciolaria tephrina</i> shares many characters with its congeners, warranting its inclusion in the genus. The general shape of the shell is similar to other <i>Fasciolaria</i>. The columellar plications agree in number and position; the subsutural grooves, labial denticles, and internal lirae are present in other tropical western Atlantic species. The large deviated protoconch (i.e. the protoconch coiling axis forms roughly a right angle with that of the teleoconch) is not typical of other West Atlantic species, but this type of protoconch is also present in the African <i>F. rutila</i> (figs. 11, 12). <i>Fasciolaria rutila</i> is distinguishable from <i>F. tephrina</i> by its slender shape, spiral sculpture formed by numerous shallow grooves, short siphonal canal (approximately 16 % of total shell length), lack of denticles on the external lip, and low but distinct callus on parietal wall. <i>Fasciolaria tulipa</i> (figs. 9, 10) and <i>F. hollisteri</i> (Weisbord, 1962: pl. 31, fig. 1­2) have mottled color pattern of dark brown and cream with several dark spiral lines, their surfaces are sculptured with spiral grooves, and the subsutural grooves are much deeper and wider. The whorls of <i>F. tulipa</i> and <i>F. holisteri</i> are less convex, their apertures more elongate and their siphonal canals shorter (approximately 15 % of total shell length). The protoconch (fig. 10) of <i>F. tulipa</i> and <i>F. hollisteri</i> are mammilated and much smaller (approximately 2.5 mm in height) than that of <i>F. tephrina</i>. <i>Fasciolaria lilium lilium</i> (figs. 7, 8), <i>F. lilium hunteria</i> and <i>F. bullisi</i> are somewhat smaller (approx. 65 – 130 mm in length) and have color patterns of a few dark brown lines over a mottled background of cream and light brown (see Abbott, 1974: p. 228, fig. 2505 and plt. 10, figs. 2501, 2502), their surfaces are smooth and lack the subsutural spiral grooves but have a few obsolete spiral cords over the siphonal canal. The whorls of <i>F. lilium lilium</i>, <i>F. lilium hunteria</i> and <i>F.bullisi</i> are less convex, their apertures more elongate and their siphonal canals shorter (15 – 19 % of total shell length). Internally the apertures of <i>F. lilium lilium</i>, <i>F. lilium hunteria</i> and <i>F. bullisi</i> have a low keel at the posterior part of their parietal walls, also the columellar plications are visible at their apertures. Their protoconch (fig. 8) are smaller (approximately 3 mm in height) and mammilated. <i>Fasciolaria insularis</i> is much smaller (25 – 28 mm in length), the shell surface is tessellate with numerous raised thin spiral cords, crossed by thin ribs, the siphonal canal is much shorter, and the protoconch is much smaller and cylindrical (Fernández, 1977: 28, figs. 1­2) than that of <i>F. tephrina</i>. Etymology: This species is named for its ashen white coloration, from the Greek <b>tephrinos</b> that means ash­colored.
description: Published as part of <i>De, Paulino J. S. &amp; Souza, 2002, A new bathyal Fasciolaria (Mollusca: Caenogastropoda) from the southwestern Caribbean, pp. 1-7 in Zootaxa 49</i> on pages 2-5, DOI: 10.5281/zenodo.4620086
description: {"references": ["Weisbord, N. E. (1962) Late Cenozoic gastropods from northern Venezuela. Bulletins of American Paleontology, 42 (193), 1 - 672.", "Abbott, R. T., 1974. American Seashells 2 nd ed. Van Nostrand Reinhold Co., New York, 663 pp.", "Fernandez, D. (1977) Nueva especie de Fasciolaria de Argentina (Moll. Gastr.) Neotropica, 23, 27 - 29."]}