Pygmaepterys giselae ( Boettger, 1902 )

Pygmaepterys giselae ( Boettger, 1902) View in CoL

Figs 21 View FIGURE 21 , 23A View FIGURE 23

1

–A

View FIGURE 1

2 View FIGURE 2

* Murex (Muricidea) giselae View in CoL n. sp. — Boettger 1902: 30.

Murex (Muricidea) giselae Bttgr. View in CoL — Boettger 1906: 43.

Muricidea giselae Boettger View in CoL — Zilch 1934: 251, pl. 15, figs. 79a–b.

[ Murexiella View in CoL ] giselae Boettger, 1901 View in CoL — Vokes 1971: 54.

Murexiella giselae (Boettger, 1901) — Stojaspal 1978: 334.

Favartia (Pygmaepterys) giselae ( Boettger, 1902) — Kovács 2019: 126, figs. 38–41.

Type material. Lectotype (designated by Zilch 1934: 251), SFM 363228 (= 12-2320a), SL: 10.0 mm, MD: 5.6 mm, CoŞteiu de Sus ( Romania), illustrated in Zilch (1934: pl. 15, fig. 79), figs. 23A 1 –A 2.

Revised description. Small, broadly fusiform shell with conical spire; apical angle 50°. Protoconch conical, worn, consisting of> 2 smooth whorls. Teleoconch of up to five whorls. Spire whorls shouldered; suture deeply incised. Axial sculpture of moderately prominent varices (seven on spire whorls, six on last whorl). Spiral sculpture of broad P1 and P2; P1 forming short, adaxially curved spines on shoulder varix. Shell surface covered by dense, delicate, scabrose growth lines. Last whorl attaining 71% of total height, moderately convex; P1 relatively weak, P2–P4 prominent, broad, P5 of intermediate strength, P6 weak, ADP and MP of intermediate strength; s2–s4 weak. Delicate, scabrose secondaries intercalated on flaring terminal varix. Aperture narrowly ovate. Outer lip strongly thickened by foliose terminal varix, with weakly crenulate edge; prominent D1–D5. Anal canal weakly accentuated by weak anal denticle and ID. Siphonal canal of medium length, open, straight, slightly dorsally recurved. Columella moderately excavated in adapical half with prominent denticle above slightly angled transition to siphonal canal. Columellar callus forming broad partly erect rim, adherent in parietal area.

Discussion. Pygmaepterys giselae ( Boettger, 1902) was considered a subjective junior synonym of Pygmaepterys transsylvanicus (Hoernes & Auinger, 1885) by Merle et al. (2022: 378). However, they differ in the fewer (6 versus 8) and more strongly flaring varices of P. giselae , which consequently do not form the characteristic cancellate pattern seen in P. transsylvanicus . Moreover, P. transsylvanicus is slenderer, the varices do not develop recurved spines on P1, the outer lip denticles are slightly stronger, with D2 being strongest in some specimens, and there are more numerous folds on the abapical half of the columella. Therefore, we consider the two species distinct.

Paleoenvironment. Unknown.

Distribution in Central Paratethys. Badenian (Middle Miocene): Făget Basin: CoŞteiu de Sus ( Romania) ( Boettger 1902; Kovács 2019).