Bellacolumbella embryonalis ( Boettger, 1902 ), Harzhauser & Landau, 2021

Harzhauser, Mathias & Landau, Bernard M., 2021, The Columbellidae (Gastropoda, Buccinoidea) in the Miocene Paratethys Sea — striking diversity of a negelected group, Zootaxa 5025 (1), pp. 1-75: 57

publication ID

https://doi.org/10.11646/zootaxa.5025.1.1

publication LSID

lsid:zoobank.org:pub:35E6C8FA-4078-4C53-9B74-F9618D5E6E60

persistent identifier

http://treatment.plazi.org/id/256F7D50-E253-FFD8-ACD6-301BFBD3B084

treatment provided by

Plazi

scientific name

Bellacolumbella embryonalis ( Boettger, 1902 )
status

nov. comb.

Bellacolumbella embryonalis ( Boettger, 1902)   nov. comb.

Figs 4V, 17A 1 –A 2, B 1 –B 2

* Columbella (Nitidella) embryonalis   n. sp. — Boettger 1902: 16.

Columbella (Anachis) embryonalis Bttgr.   — Boettger 1906: 19.

Pyrene (Anachis) embryonalis (Boettger)   — Zilch 1934: 254, pl. 16, fig. 92.

Pyrene (Anachis)   sp.— Csepreghy-Meznerics 1956: 403, pl. 7, figs 42–43.

Type materal. Lectotype (designated by Zilch 1934): SMF 360676 (= XII.2226 a), Senckenberg Museum, Frankfurt/ Main, Germany, SL: 5.1 mm, MD: 2.1 mm, Coşteiu de Sus ( Romania), illustrated in Zilch (1934, pl. 16, fig. 92), Figs 4V, 17A 1 –A 2. Paralectotypes: SMF 360676 (= XII.2223 a–b), Senckenberg Museum, Frankfurt/Main, Germany, SL: 4.2 mm, MD: 1.7 mm, Coşteiu de Sus ( Romania), Figs 17B 1 –B 2.

Additional material. NHMW 2020 View Materials /0173/0002 (ex B. Landau coll.), 2 spec., Coşteiu de Sus ( Romania)   .

Description. Shell small, moderately broad fusiform, thin, high spired with deeply incised suture. Large, low conical multispiral protoconch of 3.5 convex whorls, terminating in moderately deep sinusigera. Protoconch microsculpture of delicate axial ribs being most prominent below mid-whorl, adapically fading out. Teleoconch of four whorls. Spire whorls weakly convex to flat-sided with periphery close to abapical suture. Sculpture of closeset, prominent orthocline to weakly opisthocline slightly curved axial ribs, adapically terminating in pointed tips. Spiral sculpture of weak spiral cords on abapical portion of base and siphonal fasciole. Last whorl convex, strongly constricted at base. Aperture moderately wide. Outer lip slightly thickened with five prominent denticles within. Anal canal weakly incised, V-shaped. Siphonal canal moderately long, narrow, deeply notched at tip. Columellar callus sharply delimited, forming narrow callus rim, with three columellar denticles. Small parietal callus pad.

Shell measurements and ratios. SL: 4.2–5.1 mm, MD: 1.7–2.1 mm, AA: 26–29°, SL/MD: 2.5–2.6, AL/AW: 3.1–3.2, LWH/AH: 1.3.

Discussion. This species differs from Bellacolumbella karreri   and B. katharinae   in the conical spire and the higher number of axial ribs, which develop only delicate nodes at their tips. In addition, the labial denticles are more prominent. Despite having more crowded axial sculpture than its congeners, the peculiar protoconch places it in Bellacolumbella   .

Palaeoenvironment. Unknown.

Distribution in Central Paratethys. Badenian (middle Miocene): Pannonian Basin: Letkés ( Hungary) ( Csepreghy-Meznerics 1956); Făget Basin: Coşteiu de Sus ( Romania) ( Boettger 1906).

SMF

Forschungsinstitut und Natur-Museum Senckenberg

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Neogastropoda

Family

Columbellidae

Genus

Bellacolumbella

Loc

Bellacolumbella embryonalis ( Boettger, 1902 )

Harzhauser, Mathias & Landau, Bernard M. 2021
2021
Loc

Pyrene (Anachis)

Csepreghy-Meznerics, I. 1956: 403
1956
Loc

Pyrene (Anachis) embryonalis (Boettger)

Zilch, A. 1934: 254
1934
Loc

Columbella (Anachis) embryonalis Bttgr.

Boettger, O. 1906: 19
1906
Loc

Columbella (Nitidella) embryonalis

Boettger, O. 1902: 16
1902