Lampanella obliquistoma ( Seguenza, 1880 )

Harzhauser, Mathias, Guzhov, Aleksandr & Landau, Bernard, 2023, A revision and nomenclator of the Cainozoic mudwhelks (Mollusca: Caenogastropoda: Batillariidae, Potamididae) of the Paratethys Sea (Europe, Asia), Zootaxa 5272 (1), pp. 1-241 : 123-125

Lampanella obliquistoma ( Seguenza, 1880)

Figs 21B–F

Cerithium mayeri — Doderlein 1863: 101 [nomen nudum].

* C [erithium]. obliquistoma n. sp. — Seguenza 1880: 155, pl. 11, fig. 25.

[ Cerithium ] P [ithocerithium]. obliquistoma var. Mayeri (Dod.)— Sacco 1895: 34, pl. 2, fig. 87.

[ Cerithium ] P [ithocerithium]. obliquistoma var. subturrita Sacc. — Sacco 1895: 34, pl. 2, fig. 88.

[ Cerithium ] P [ithocerithium]. obliquistoma var. inflatovula Sacc. — Sacco 1895: 34, pl. 2, fig. 81.

Cerithium (Pithocerithium) attritum n. sp. —Boettger 1907: 140.

Pithocerithium pseudobliquistoma n. sp. — Szalai 1926: 343, text-figs 2–4.

Cerithium (Thericium) attritum (Boettger) —Zilch 1934: 221, pl. 8, fig. 30.

? Potamides schaueri Hilber — Csepreghy-Meznerics 1954: 19, pl. 1, fig. 26 [non Hilber, 1882].

Cerithium (Vulgocerithium) pseudobliquistoma Szalai — Strausz 1954: 96, pl. 3, figs 50a–d.

Cerithium (Vulgocerithium) pseudobliquistoma Szalai, 1926 — Strausz 1955a: 144.

Cerithium (Pithocerithium) obliquistoma Seguenza mayeri Doderlein — Eŗnal-Erent̂z 1958: 32, pl. 3, figs 20–23. Pithocerithium pseudobliquistoma Szalai 1926 — Boda 1964: 130.

Cerithium (Vulgocerithium) pseudobliquistoma (Szalai) — Kókay 1966: 45, pl. 4, fig. 18.

Cerithium rubiginosum pseudobliquistoma Szalai — Strausz 1966: 132 (pars), pl. 9, figs 11–18.

Cerithium (Thericium) obliquistoma Seguenza, 1880 — Robba 1968: 519, pl. 40, fig. 5.

Cerithium (Ptychocerithium) pseudobliquistoma Szalai — Csepreghy-Meznerics 1972: 21, pl. 3, fig. 24.

Cerithium (Thericium) obliquistoma attritum (Boettger) — Bałuk 1975: 149, pl. 18, figs 10–11.

Cerithium (Thericium) attritum Boettger —Kókay 1996: 456, pl. 2, fig. 9.

Cerithium obliquistoma Seguenza — Cecalupo 2004: 155, pl. 24, figs 4a, b, h.

Cerithium (Thericium) obliquistoma ( Seguenza, 1880) — Bałuk 2006: 198, pl. 8, fig. 6.

Cerithium obliquistoma (Seguenza, 1879) — Vazzana & Cecalupo 2007: 184, pl. 5, figs f–h.

Pithocerithium pseudobliquistoma Szalai, 1926 — Pálfy et al. 2008: 109.

Cerithium (Thericium) obliquistoma ( Seguenza, 1880) var.— Katona et al. 2011: 7, pl. 1, fig. 1.

Cerithium (Terichium [sic]) subpupaeformis n. sp. —Kókay in Katona et al. 2011: 4, 7, pl. 1, fig. 4.

Cerithium peyroti Dollfuss [sic], 1909— Katona et al. 2011: 8, pl. 1, fig. 3 [non Dollfus, 1909].

Cerithium (Thericium) obliquistoma Seguenza, 1880 — Caprotti 2011: 50.

Lampanella obliquistoma ( Seguenza, 1880) — D’Amico et al. 2012: 162, pl. 1, figs 8–10.

Lampanella obliquistoma ( Seguenza, 1880) —Harzhauser et al. 2013: 359, pl. 1, fig. 5.

Lampanella obliquistoma ( Seguenza, 1880) — Martín-González et al. 2018: 193, 214.

Type material. Syntype illustrated in Seguenza (1880: pl. 11, fig. 25), SL: 15.5 mm, MD: 7.5 mm. The collection of Giuseppe Seguenza (1833–1889) was destroyed during the earthquake of 28 th December 1908, which hit Messina and Reggio Calabria ( La Perna 2010). Nevertheless, 27 specimens of Cerithium obliquistoma from the Miocene of Rometta from the original Seguenza collection are now stored in the Museo di Storia Naturale, Università di Firenze ( Italy) (IGF 14648E). One of these might be a candidate for a lectotype (Stefano Dominici, pers. comm.).

Type locality. Monteleone di Calabria ( Italy) .

Stratigraphy. Late Miocene, Tortonian.

Illustrated material. NHMW 1861/0040/0264, SL: 10.5 mm, MD: 4.9 mm, Lăpugiu de Sus ( Romania), Badenian (Middle Miocene), Figs 21C 1 –C 2; NHMW 1874 /0024/0015, SL: 8.8 mm, MD: 4.9 mm, Baden ( Austria), Badenian ( Middle Miocene ), Figs 21D 1 –D 2 ; NHMW 1865 /0030/0046, SL: 11.1 mm, MD: 6.0 mm, Nagymaros ( Hungary), Badenian ( Middle Miocene ), Figs 21E 1 –E 2 ; NHMW 1877 /0020/0064, SL: 10.8 mm, MD: 5.7 mm, S. Agata ( Italy), Tortonian ( Late Miocene ), Figs 21F 1 –F 2 ; SMF 365728 (XII 2428 a), SL: 5.1 mm, MD: 2.2 mm, Senckenberg Forschungsinstitut und Naturmuseum Frankfurt a. M. ( Germany), Coşteiu de Sus ( Romania), Middle Miocene (Badenian), lectotype of Cerithium (Pithocerithium) attritum Boettger, 1907 , Figs 21B 1 –B 2 .

Revised description. Small, solid, squat ovoid shell with short, conical to weakly cyrtoconoid spire. Protoconch broad, low dome-shaped, convex of about 1–1.5 whorls. Early teleoconch slender conical (apical angle 35°); first two teleoconch whorls high, weakly convex with about five weak spiral cords (succession of appearance and exact number not visible in available material). Convexity and width of whorls distinctly increasing on third teleoconch whorl. Apical angle of adult shell ranging from 35° to 60°. Number of spiral cords increasing to about 12 cords by third teleoconch whorl, coinciding with onset of wide-spaced axial ribs bearing two spiral rows of rounded tubercles, abapical placed close below adapical suture, adapical mid-whorl; third row of weaker tubercles occasionally intercalated just above abapical suture. On penultimate whorl, spiral sculpture of flattened cords separated by narrow grooves; three broader primary cords with a variable number of secondary cords intercalated; primaries swollen over tubercles. Suture moderately incised, strongly undulating. Last whorl high, ovoid, with two rows of prominent, wide-spaced rounded nodes, further weaker rows may be present abapically; weak ventrolateral varix developed in some specimens, evenly convex, not contracted over base. Aperture wide, ovoid to subcircular, strongly oblique. Outer lip well rounded, slightly thickened, with broad, convex basal margin; anal canal narrowly incised; siphonal canal strongly deflected to the left, almost horizontal, short, moderately wide, deeply incised and deeply notched. Columella deeply excavated, smooth. Inner lip callus sharply delimited from base, moderately thickened; parietal callus often strongly thickened forming broad parietal pad.

Synonyms. Three subjective junior synonyms of Lampanella obliquistoma have been proposed for Paratethyan specimens. Already Bałuk (2006) and D’Amico et al. (2012) discussed these as synonyms of L. obliquistoma . Cerithium attritum Boettger, 1907 is based on a juvenile specimen from Coşteiu de Sus ( Romania) that lacks the prominent sculpture of adult specimens. Pithocerithium pseudobliquistoma Szalai, 1926 and Cerithium subpupaeformis Kókay in Katona et al. 2011 represent elongate specimens, which fall well in the range of variability of L. obliquistoma .

Discussion. Lozouet et al. (2001) transferred ‘ Cerithium ’ pupaeforme , found in the early Oligocene to Early Miocene of Europe, to Batillaria , although with some doubt. This would have been the only record of this genus from Europe. Instead, we suggest that the pupoidal shape, 10 mm size, granular sculpture, very short canal and form of the ventrolateral varix are all more consistent with Lampanella . Indeed, since Batillaria has in the past been widely used for the American Lampanella minima ( Bequaert 1942; Abbott 1974), Lozouet et al. (2001) may have had this resemblance in mind. Ozawa et al. (2009) discussed a placement of Cerithium pupaeformis de Basterot, 1825 in Lampanella . This placement was followed by D’Amico et al. (2012), Harzhauser et al. (2013) and Martín-González et al. (2018) also for Cerithium obliquistoma Seguenza, 1880 . Striking similarities in apertural features and sculpture support this placement.

Like its extant congener Lampanella minima , the Miocene Lampanella obliquistoma is very variable in shape and sculpture. Bulky, ovoid shells occur along with more slender shells (e.g., D’Amico et al. 2012: pl. 1, figs 8–10). Similarly, the nodes vary from prominent, slightly pointed to reduced, rounded. Lampanella obliquistoma is distinguished from the Chattian to Middle Miocene L. pupaeformis (de Basterot, 1825) , by its even broader shell, even shorter spire and more prominent sculpture. L. pupaeformis lacks the spiral rows of protruding nodes. Specimens, such as that illustrated by Vignal (1911: pl. 7, fig. 15), however, document the close relation between both species. We note differences in protoconch morphology, which is larger, less convex and broader in L. obliquistoma .

Distribution. Lampanella obliquistoma appeared during the Langhian, when it is recorded in the Central Paratethys from Austria, Hungary, Poland, and Romania. In the Proto-Mediterranean Sea it is documented from the Tortonian of Italy and Turkey and from the Messinian of Italy. Its westernmost distribution is documented from the Tortonian of the Canary Islands. This species seems to have become extinct at the Miocene/Pliocene boundary.

Central Paratethys. Badenian (Middle Miocene): Korytnica Basin: Korytnica ( Poland) ( Bałuk 1975, 2006); Vienna Basin: Baden ( Austria) (hoc opus); Pannonian Basin: Budapest Illés street, Herend–Márkó, Nagymaros Várpalota ( Hungary) ( Katona et al. 2011; Kókay 1966; Strausz 1966); Bükk Mountains: Borsodbóta ( Hungary) ( Csepreghy-Meznerics 1972); Făget Basin: Coşteiu de Sus, Lăpugiu de Sus ( Romania) (Zilch 1934; hoc opus).

Proto-Mediterranean Sea. Tortonian (Late Miocene): Adana Basin ( Turkey) (Eŗnal-Erent̂z 1958); Piedmont, Tuscany, Calabria, Sicily ( Italy) ( Seguenza 1880; Sacco 1895; Robba 1968; D’Amico et al. 2012), Messinian: Sicily ( Italy) (Harzhauser et al. 2013).

Northwestern Atlantic. Tortonian (Late Miocene): Canary Islands ( Martín-González et al. 2018).