Mangelia michaelseni (Strebel, 1905)

Luca, Javier Di & Zelaya, Diego G., 2019, Gastropods from the Burdwood Bank (southwestern Atlantic): an overview of species diversity, Zootaxa 4544 (1), pp. 41-78 : 59

Mangelia michaelseni (Strebel, 1905)

Fig. 4I

Bela ? michaelseni Strebel, 1905b: 587 , pl. 22, figs. 23, 23a, b

Mangelia michaelseni — Castellanos & Landoni, 1986: 295, figs. 8, 9

Examined material. 2 an. and 10 sh. (MACN-In 40693).

Description. Shell height to 5.4 mm (up to 10 mm according to Castellanos 1967); fusiform, moderately solid. Protoconch large, smooth, of 1.75 markedly convex whorls. Teleoconch with up to 3.25 whorls, slightly convex in outline; last whorl comprising about 70% of total shell height. Suture impressed. Surface white; sculptured with 17 to 22 strong axial ribs per whorl; and low spiral cords, in number of 9 to 13 on the spire whorls and about 30 on the last whorl. Axial sculpture vanishing towards the base, and in some specimen reduced to strong growth lines in last whorls. Aperture ovate, interior white; columellar callus narrow; siphonal canal moderately short, somewhat oblique, wide.

Figures

FIGURE 4: A. Proneptunea (?) minuta Castellanos, 1992, MACN-In 40694, scale bar = 1 mm. B. “Savatieria” meridionalis (Smith, 1881), MACN-In 40685, scale bar = 1 mm. C. “Savatieria” chordata Castellanos, Rolán & Bartolotta, 1987, MACN-In 40687, scale bar = 1 mm. D. Buccinidae sp., MACN-In 40686, scale bar = 1 mm. E. Fuegotrophon pallidus (Broderip, 1832), MACN-In 40690, scale bar = 5 mm. F. Trophon ohlini Strebel, 1904, MACN-In 40689, scale bar = 5 mm. G. Trophon plicatus (Lightfoot, 1786), MACN-In 40688, scale bar = 2 mm. H. Paradmete crymochara (Rochebrune & Mabille, 1885), MACN-In 40691, scale bar = 5 mm. I. Mangelia michaelseni (Strebel, 1905), MACN-In 40693, scale bar = 1 mm. J. Leucosyrinx angusteplicata (Strebel, 1905), MACN-In 40692, scale bar = 4 mm. K. Thesbia michaelseni (Strebel, 1905), MACN-In 40695, scale bar = 1 mm. L. Admete magellanica (Strebel, 1905), MACN-In 40696, scale bar = 3 mm.