Gracilipurpura polonica ( Bałuk, 1995 )

Harzhauser, Mathias, Landau, Bernard M. & Merle, Didier, 2025, The Muricidae (Gastropoda, Muricoidea) of the Miocene Central Paratethys Sea (Haustrinae, Muricinae, Ocenebrinae, Pagodulinae, Typhinae, Muricidae incertae sedis), Zootaxa 5572 (1), pp. 1-162 : 38-39

publication ID	https://doi.org/10.11646/zootaxa.5572.1.1
publication LSID	lsid:zoobank.org:pub:7AF6A560-3FAC-4490-B167-327A7912F242
persistent identifier	https://treatment.plazi.org/id/F73C87F9-FFC3-807C-FF50-AA17FDFAB839
treatment provided by	Plazi
scientific name	Gracilipurpura polonica ( Bałuk, 1995 )
status

Treatment

Gracilipurpura polonica ( Bałuk, 1995)

Figs 13 View FIGURE 13 , 15A–D View FIGURE 15

Fusus an virgineus Grat.— Friedberg 1912: 160 (pars), pl. 9, fig. 10 [not fig. 9] [non Euthria virginea ( Grateloup, 1833].

* Hadriania polonica View in CoL sp. nov. — Bałuk 1995: 225, pl. 29, figs 2–5.

Hadriania coelata ( Dujardin, 1837) — Mikuž 2009: 26, pl. 8, fig. 110 [non Ocinebrinopsis coelata ( Dujardin, 1837) ]. Ocinebrina polonica ( Bałuk, 1995) View in CoL — Landau et al. 2013: 153, pl. 22, figs 10–11, pl. 64, fig. 3.

Type material. Holotype: Z.PAL.U.W. BkK-G583, SL: 17.5 mm, MD: 6.8 mm, Korytnica ( Poland), illustrated in Bałuk (1995: pl. 29, fig. 4), Figs 15A View FIGURE 15 1 –A View FIGURE 1 2 View FIGURE 2 . Paratypes: Z.PAL.U.W. BkK-G581, SL: 8.5 mm, MD: 4.0 mm, Korytnica ( Poland), illustrated in Bałuk (1995: pl. 29, fig. 2), Figs 15B View FIGURE 15 1 –B View FIGURE 1 2. Z View FIGURE 2 .PAL.U.W. BkK-G582, SL: 14.0 mm, MD: 6.0 mm, Korytnica ( Poland), illustrated in Bałuk (1995: pl. 29, fig. 3), Figs 15C View FIGURE 15 1 –C View FIGURE 1 2. Z View FIGURE 2 .PAL.U.W. BkK-G584, SL: 17.5 mm, MD: 8.5 mm, Korytnica ( Poland), illustrated in Bałuk (1995: pl. 29, fig. 5), Figs 15D View FIGURE 15 1 –D View FIGURE 1 2 View FIGURE 2 .

NHMW 1847/0058/0545, Akboğazi, Lale River ( Turkey), SL: 19.1 mm, MD: 9.1 mm, illustrated in Landau et al. (2013: pl. 22, fig. 11), Figs 15E View FIGURE 15 1 –E View FIGURE 1 2 View FIGURE 2 .

Revised description. Small, slender fusiform shell; apical angle ~42–60°. Protoconch high conical of 2.5 smooth, convex whorls. Teleoconch of up to five whorls. Suture strongly incised, shallowly undulating. Early teleoconch whorls convex with shallow subsutural ramp, moderately convex periphery. Axial sculpture of up to 15 narrow axial ribs overrun by weak cord on subsutural ramp and two prominent cords along periphery, forming weak nodes at intersections. Last whorl attaining ~77% of total height, with broad, straight-sided subsutural ramp, angled shoulder, convex periphery, strongly constricted at base. Axial ribs weak, forming weak nodes along shoulder. Spiral sculpture: first whorl, P1 and P2; second whorl, IP (on subsutural ramp), P1 and P2; third whorl, IP, P1, s1, P2 and s2; fourth whorl, adis, IP, abis, P1, s1, P2 and s2; fifth whorl: adis, IP, abis on the subsutural ramp, P1 (along shoulder most prominent) to P6 and s1 to s6 on convex part of whorl, ADP to EAB2 and ads, ms, abs on siphonal canal. Fasciole subobsolete. Aperture narrowly pyriform. Outer lip thin, with crenulated edge, smooth within. Anal canal indistinct. Siphonal canal very long, open, slightly twisted. Columella broadly excavated, smooth, slightly twisted at siphonal canal. Columellar callus forming weak, adherent rim.

Discussion. The slender shape and long siphonal canal suggest placement in Gracilipurpura . The shell of Gracilipurpura polonica ( Bałuk, 1995) differs from the extant Mediterranean Gracilipurpura craticulata ( Bucquoy & Dautzenberg, 1882) in its slenderer shape and less prominent axial ribs. The protoconch of Gracilipurpura craticulata consists of 1.5 whorls with a large globose nucleus, differing distinctly from the conical protoconch of 2.5 whorls in Gracilipurpura polonica .

Although Gracilipurpura polonica ( Bałuk, 1995) has rarely been reported from Paratethyan assemblages, it had a wide paleogeographic distribution. Landau et al. (2013) recorded it also from the Serravallian of Turkey, showing specimens with identical protoconch morphology as the Polish type specimens.

Paleoenvironment. Shallow marine, inner neritic.

Distribution in Central Paratethys. Badenian (Middle Miocene): Korytnica Basin: Korytnica ( Bałuk 1995); Krka Basin: Dolenja Brezovica ( Slovenia) ( Mikuž 2009).

Proto-Mediterranean Sea. Serravallian (Middle Miocene): Karaman Basin: Lale, Akboğaz, Akpınar, Seyithasan ( Turkey) ( Landau et al. 2013).

Genus Heteropurpura Jousseaume, 1880

Type species. Murex polymorphus Brocchi, 1814 View in CoL ; original designation by Jousseaume (1880: 335). Pliocene, Italy.