Cancilla planicostata
Creators: name: Harzhauser, Mathias
name: Landau, Bernard
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Neogastropoda
Mitridae
Cancilla
Cancilla planicostata

description: Cancilla planicostata (Bellardi, 1887)
Figs 14E 1 –E 2, F 1 –F 2, G 1 –G 2, H, 7I 1 –I 2, J 1 –J 2
Mitra (Nebularia) scrobiculata Brocc. — Hoernes & Auinger 1880: 80, pl. 9, figs 17a–b [non Brocchi, 1814].
Mitra exarata Bell. — Bellardi 1887a: 84, pl. 4, fig. 53 [non A. Adams, 1853].
* Mitra planicostata Bell. — Bellardi 1887b: 5, pl. 2, fig. 9.
Mitra (Mitra) exarata Bell. — Boettger 1906: 8 [non A. Adams, 1853].
M [itra]. (T [iara].) planicostata Blld. — Sieber 1958a: 154.
M [itra]. (T [iara].) grateloupi Orb. — Sieber 1958a: 154 [non d’Orbigny, 1852].
Mitra (Tiara) grateloupi Orb. — Sieber 1958b: 149 [non d’Orbigny, 1852].
Mitra (Tiara) grateloupi d’Orbigny, 1852 —Kojumdgieva in Kojumdgieva & Strachimirov 1960: 157, pl. 42, fig. 1.
Mitra exarata Bellardi, 1887 — Ferrero Mortara et al. 1981: 162, pl. 50, figs 1a–b.
Mitra planicostata Bellardi, 1887 — Ferrero Mortara et al. 1981: 162, pl. 50, figs 2a–b.
Cancilla planicostata Bellardi, 1887 — Cavallo & Repetto, 1992: 118, fig. 303.
Mitraria (Tiara) grateloupi d’Orbigny — Schultz 1998: 70, pl. 28, fig. 9.
Cancilla planicostata (Bellardi, 1887) — Chirli 2002: 45, pl. 22, figs 10–11.
Cancilla planicostata (Bellardi, 1887) — Landau et al. 2013: 211, pl. 33, figs 4–8, pl. 80, fig. 7.
Type material. Syntype (BS.019.01.190) illustrated in Ferrero Mortara et al. (1981, pl. 50, figs 2a–b), Pliocene, Vezza Alba, Italy, stored in the Museo Regionale di Scienze Naturali, Torino.
Additional material. NHMW 1854/0035/0092, SL: 45.7 mm, MD: 11.9 mm, Lăpugiu de Sus (Romania), illustrated in Hoernes & Auinger (1880, pl. 9, figs 17a–b), figs 14F 1 –F 2; NHMW 2020/0112/0001, SL: 35.5 mm, MD: 8.5 mm, Coşteiu de Sus (Romania), figs 14G 1 –G 2, figs 7I 1 –I 2; NHMW 2020/0112/0002, SL: 35.6 mm, MD: 9.2 mm, Coşteiu de Sus (Romania), figs 14E 1 –E 2; NHMW 2020/0112/0003, SL: 40.3 mm, MD: 10.9 mm, Coşteiu de Sus (Romania), fig. 14H; NHMW 2020/0112/0002, SL: 37.5 mm, MD: 9.9 mm, Coşteiu de Sus (Romania), figs 7J 1 –J 2.
Revised description (of Paratethyan material). Shell moderately large, slender fusiform with narrowly incised suture. Protoconch high conical of about three weakly convex whorls. Teleoconch of eight whorls; spire whorls nearly straight sided with periphery at abapical suture; rarely slightly convex. First teleoconch whorl weakly cancellate with predominant spiral sculpture composed of five spiral cords. On second teleoconch whorl sixth spiral cord appears at abapical suture, intermediate whorls with six fully exposed cords, seventh cord appears on penultimate whorl. Spiral cords broad, with flat tops and rounded edges, separated by narrow, punctate spiral grooves. Last whorl elongate, weakly convex, slowly contracting with shallow concavity at base. About 18 to 20 spiral cords on last whorl. Outer lip thin, weakly crenulated by terminations of spiral grooves. Aperture moderately narrow. Columellar callus narrow, thin, sharply delimited, prominent fasciole. Columella with three oblique folds, weakening abapically. Siphonal canal long, moderately narrow, distinctly twisted, with deep siphonal notch. Colour pattern in UV light consisting of dark, broad, weakly undulating axial stripes or flammulae separated by light interspaces. Less intense dark spiral stripes in spiral grooves.
Shell measurements and ratios. SL = 31.1–45.7 mm, MD: 8.5–11.9 mm; AA = 24–28°, SL/ MD: 3.6–4.2, AL/AW: 5.4–6.5, AH/S: 2.0–2.1.
Discussion. The species displays some variability in its spiral sculpture. The adapical two spiral cords may amalgamate and the spiral grooves on the last whorl may become subobsolete along the periphery. The overall shape and sculpture suggest a relationship with the Cancilla scrobiculata group [e.g. C. praescrobiculata (Toldo, 1889), C. scrobiculata (Brocchi, 1814), C. pulcherrima (Bellardi, 1887)]. It is clearly separated from these species by its much smaller size and the less elongate outline. The axial colour pattern of Cancilla planicostata, was also documented by Landau et al. (2013) from Serravallian specimens from Turkey, supporting our assumption that both occurrences are conspecific.
Palaeoenvironment. The specimens from the Vienna Basin were collected from basinal clays of the Baden Formation, indicating middle to outer neritic environments with up to 250 m water depth (Hohenegger et al. 2008).
Distribution in Central Paratethys. Badenian (middle Miocene): Vienna Basin: Bad Vöslau (Schultz 1998), Făget Basin: Coşteiu de Sus, Lăpugiu de Sus (Romania) (Hoernes & Auinger 1880); Dacian Basin: Staropatica (Bulgaria) (Kojumdgieva in Kojumdgieva & Strachimirov 1960).
Proto-Mediterranean Sea. Serravallian (middle Miocene): Karaman Basin: Akboðazi, Akpýnar, Lale, Pýnarlar Yaylasý, Seyithasan, Tilkikaya (Turkey) (Landau et al. 2013); Tortonian (late Miocene): Po Basin: Montegibbio (Italy) (Davoli 2000; Zanclean (Pliocene): Roussillon Basin, France (Chirli & Richard 2008); central Mediterranean, Italy (Bellardi 1887b; Sacco 1904; Chirli 2002).
description: Published as part of Harzhauser, Mathias & Landau, Bernard, 2021, The Mitridae (Gastropoda: Neogastropoda) of the Miocene Paratethys Sea, pp. 1-72 in Zootaxa 4983 (3) on page 54, DOI: 10.11646/zootaxa.4983.1.1, http://zenodo.org/record/4921887