Takashius kantori, Harzhauser & Landau & Vermeij, 2024

Harzhauser, Mathias, Landau, Bernard M. & Vermeij, Geerat J., 2024, The Dolicholatiridae and Fasciolariidae (Gastropoda, Buccinoidea) of the Miocene Paratethys Sea, Zootaxa 5470 (1), pp. 1-92 : 63

Takashius kantori nov. sp.

Figs 27F 1 –F 2

Type material. Holotype: NHMW 1870 /0033/0102, SL: 31.1 mm, MD: 13.6 mm, Lăpugiu de Sus ( Romania), Figs 27F 1 –F 2 .

Type locality. Lăpugiu de Sus ( Romania), Făget Basin .

Type stratum. Silt and clay of the Dej Formation.

Age. Middle Miocene, early/middle Badenian (Langhian).

Etymology. In honor of Yuri I. Kantor (Russian Academy of Sciences, Moscow, Russian Federation), in recognition of his contributions to malacology.

Diagnosis. Medium-sized, slender fusiform shell with conical spire and long siphonal canal, convex whorls with very prominent, strongly raised axial ribs separated by wide interspaces, overrun by prominent spiral cords, axial ribs roughly axially aligned, columella with three weak folds abapically, outer lip strongly thickened by terminal varix, delicately lirate within.

Description. Medium-sized, slender fusiform shell of eight teleoconch whorls; apical angle 35°. Protoconch poorly preserved, conical of>2 moderately convex whorls, diameter 1100 μm. Last protoconch whorl with prominent axial riblets. Early teleoconch whorls weakly convex with periphery close above deeply incised suture. Sculpture of three prominent spiral cords overrunning prominent, widely spaced axial ribs. Later teleoconch whorls evenly convex with deeply incised, strongly undulating suture. Sculpture of about five secondary spiral cords on narrow subsutural ramp, three primary spiral cords below, two slightly more prominent secondary cords close to adapical primary cord, fourth weaker primary cord just above abapical suture; interspaces between primaries with one fine secondary cord flanked by a single tertiary thread on either side; spiral sculpture overrunning very prominent, strongly raised axial ribs, separated by wider, relatively flattened interspaces; axial ribs roughly aligned axially; six ribs on penultimate whorl; spiral cords swollen over ribs. Last whorl high, attaining 63% of total height, strongly convex with six axial ribs; base strongly constricted; base and siphonal canal with prominent primary spiral cords with 2–4 secondaries intercalated.Aperture narrowly pyriform. Columellar callus adherent. Columella excavated in upper third, with three weak columellar folds; slightly twisted at transition to siphonal canal. Anal canal indistinct. Outer lip strongly thickened by terminal varix, with ten delicate lirae close behind peristome, extending deep within aperture. Siphonal canal long, narrow, straight, slightly deflected to the left, shallowly notched.

Discussion. Takashius kantori nov. sp. is closely similar to the extant Takashius kuroseanus ( Okutani, 1975) , which has also an identical protoconch (see Kantor et al. 2018: figs 9A–G). They differ in the even slenderer profile and strongly constricted base of the Paratethyan species, its even coarser spiral cords and the slightly longer siphonal canal. Takashius vinculum nov. sp. differs from Takashius kantori in its shorter siphonal canal. Takashius kantori is reminiscent of the extant Granulifusus jeanpierrevezzaroi ( Cossignani, 2017) from Vietnam, which differs in its narrow aperture (see Kantor et al. 2018: fig 5). The axials of Takashius vinculum are stronger, more numerous (8 vs. 6), more elevated and the spirals are weaker.

Paleoenvironment. Unknown.

Distribution in Central Paratethys. Badenian (Middle Miocene): Făget Basin: Lăpugiu de Sus ( Romania) (Hoernes & Auinger 1890).

Figures

FIGURE 1. Measurements for shell morphology; AA: apical angle, SL: shell length, MD: maximum diameter, LWH: last whorl height, AH: aperture height, AL: aperture length, AW: aperture width, S: siphonal canal.

FIGURE 2. Protoconchs of Paratethyan Fasciolariidae. A. Dulaiania pleurotomoides (Hoernes & Auinger 1890), holotype, NHMW 1855/0043/0041. B. Aurantilaria tarbelliana (Grateloup, 1845), NHMW 1865/0001/0210, Lăpugiu de Sus (Romania). C. Polygona vindobonensis (Csepreghy-Meznerics, 1956), NHMW 2023/0350/0005, Bad Vöslau (Austria). D. Eurolatirus ornatus (d’Orbigny, 1852), NHMW 1846/0037/0257, Gainfarn (Austria). E. Tarantinaea hoernesii (Seguenza, 1875), NHMW 1853/0002/0052, Bad Vöslau (Austria). F. Snyderifusus prevosti (Hörnes, 1853), NHMW 1851/0006/0003, lectotype, Vienna/ Grinzing (Austria). G. Cryptoneolatirus bellardii (Hörnes, 1854), NHMW 1865/0001/0211, Lăpugiu de Sus (Romania). H. Neolatirus recticauda (Fuchs in Karrer, 1877), holotype, NHMW 1883/0002/4168, Rauchstallbrunn-Graben at Baden (Austria). I. Turrilatirus moravicus (Hoernes & Auinger, 1890), NHMW 1866/0001/0860e, paralectotype, Niederleis (Austria). J. Angustifusus hoessii (Naumann,1852), NHMW2023/0350/0006, BadVöslau (Austria).K. Angustifususvindobonensis (Hoernes & Auinger, 1890), NHMW 2023/0338/0020, Lăpugiu de Sus (Romania). L. Fraudifusinus pseudocrispoides nov. sp., NHMW 1868/0001/0462, paratype, Lăpugiu de Sus (Romania). M. Fraudifusinus crispoides (Kittl, 1887), NHMW 2023/0350/0013, Bad Vöslau (Austria). N. Pseudofusus rostratoides nov. sp., NHMW 1864/0001/0204, paratype, Gainfarn (Austria). O. Pseudofusus balteus nov. sp., NHMW 2023/0370/0001, holotype, Letkés (Hungary). P. Pseudofusus stahlschmidti nov. sp., NHMW 1846/0037/0264, holotype, Baden (Austria). Q. Pseudolatirus bilineatus (Naumann, 1852), NHMW 2023/0338/0022, Lăpugiu de Sus (Romania). R. Takashius vinculum nov. sp., NHMW 2023/0348/0008, paratype, Steinebrunn (Austria). S. Takashius boettgeri (Kovács, 2022), NHMW 2023/0338/0023, Lăpugiu de Sus (Romania).

FIGURE 27. A–D. Takashius boettgeri (Kovács, 2022). A1–A2. NHMW A1426, Lăpugiu de Sus (Romania). B1–B2. NHMW A1426, Lăpugiu de Sus (Romania). C1–C2. SMF 373160, lectotype, Lăpugiu de Sus (Romania). D1–D2. NHMWA1426, Lăpugiu de Sus (Romania). E1–E2. NHMW 1856/0043/0051, Lăpugiu de Sus (Romania). F1–F2. Takashius kantori nov. sp., NHMW 1870/0033/0102, holotype, Lăpugiu de Sus (Romania).