Pseudofusus hontensis ( Csepreghy-Meznerics, 1956 )

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 : 53

Pseudofusus hontensis ( Csepreghy-Meznerics, 1956)

Figs 19E–G

* Lathyrus (Dolicolathyrus [sic]) hontensis n. sp. — Csepreghy-Meznerics 1956: 407, pl. 8, figs 7–8.

Fusus (Aptyxis) sismondai hontensis Csepreghy-Meznerics, 1956 — Strausz 1966: 346, pl. 27, figs 3–4.

Fusinus hontensis (Csepreghy-Meznerics) — Bałuk 1995: 245, pl. 35, fig. 6.

Fusinus hontensis ( Csepreghy-Meznerics, 1956) — Bałuk 2006: 211, pl. 14, figs 4–5.

Lathyrus (Dolicolathyrus) hontensis Csepreghy-Meznerics, 1956 — Pálfy et al. 2008: 106.

Type material. Holotype, M.61.4312, SL: 45 mm, MD: 19 mm, Természettudományi Múzeum ( Hungary), Szob ( Hungary), Figs 19E 1 –E 2 .

Illustrated material. NHMW 2023/0348/0007, SL: 32.5 mm, MD: 13.7 mm, Steinebrunn ( Austria), Figs 19F 1 –F 2 . NHMW 1864/0001/0204, SL: 29.4 mm, MD: 13.8 mm, Gainfarn ( Austria), Figs 19G 1 –G 2 .

Revised description. Medium-sized, moderately slender fusiform shell of up to eight teleoconch whorls, with high spire; apical angle ~40–43°. Protoconch unknown. Early teleoconch whorls convex with broad axial ribs, separated by wider interspaces, overrun by two weak cords on subsutural ramp and three prominent, close-set spiral cords below. Later whorls with narrow subsutural collar, narrow, weakly concave subsutural ramp, rounded shoulder, strongly convex below. Suture moderately incised, shallowly undulating. Axial ribs broad, rounded, weakening adapically, overrun by about 14–15 narrow, subequal primary and secondary spiral cords on penultimate whorl. Last whorl inflated, attaining ~65 of total height, weakly shouldered, strongly convex below, with nine axial ribs most prominent at periphery, fading adapically and abapically, overrun by numerous narrow spiral cords of alternating to subequal strength; shoulder cord slightly strengthened; base strongly constricted with prominent cords of alternating strength. Aperture moderately wide, pyriform. Columellar callus forming narrow, adherent rim. Columella broadly and weakly excavated, slightly twisted at transition to siphonal canal. Anal canal distinctly incised, accentuated by small parietal denticle in fully-grown specimens. Outer lip with weak terminal varix and about 15 thin lirae extending deep within aperture. Siphonal canal moderately long, narrow, straight.

Discussion. The holotype has spiral sculpture of subequal cords separated by narrow interspaces. Specimens from the Vienna Basin and from Korytnica ( Poland) described by Bałuk (2006) display some variability with a strengthened shoulder cord and narrow cords of alternating strength. The spire whorls of these specimens are more shouldered than the holotype. Such variability is typical for many extant Pseudofusus species, such as P. patriciae (Russo & Olivieri, 2013) , P. profetai ( Nofroni, 1982) and P. rostratus ( Olivi, 1792) (see also Russo 2014).

Paleoenvironment. Coastal inner neritic, shallow marine. The occurrence at Gainfarn and Steinebrunn suggests seagrass environments ( Zuschin et al. 2007; own data, M.H.).

Distribution in Central Paratethys. Badenian (Middle Miocene): Korytnica Basin: Korytnica ( Poland) ( Bałuk 2006); Vienna Basin: Gainfarn, Steinebrunn ( Austria) (hoc opus); Pannonian Basin: Szob ( Hungary) ( Csepreghy-Meznerics 1956).

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 19. A–D. Fraudifusinus grundensis nov. sp. A1–A2. NHMW 1855/0045/0720a, paratype, Grund (Austria). B1–B2. NHMW 1855/0045/0720b, holotype, Grund (Austria). C1–C2. NHMW 1855/0045/0720c, paratype, Grund (Austria). D1–D2. NHMW 1855/0045/0720, paratype, Grund (Austria). E–G. Pseudofusus hontensis (Csepreghy-Meznerics, 1956). E1–E2. M.61.4312, holotype,Szob (Hungary).F1–F2. NHMW2023/0348/0007, Steinebrunn (Austria).G1–G2. NHMW 1864/0001/0204, Gainfarn (Austria).