Protatlanta souleyeti

Abstract

Protatlanta souleyeti (E.A. Smith, 1888) (Figs 3 C-E) Description – Very small (W to 1.7 mm). Protoconch medium high, broad, 3.5 whorls, brown. Teleoconch single, rounded whorl, rapidly increasing in size, upper part higher, colourless. Remarks. – The shells of this genus have a calcareous shells with a keel of conchiolin which is missing in all specimens seen. In outline the shell is similar to that of Atlanta echinogyra, but the protoconch is lower, laterally the shell is more rounded and the last part of the teleoconch whorl rises less. Distribution. – The species was found on the Sarawak continental slope (DD15), Brunei MES 25 and Sabah outer shelf (DD92).

Authors 4

1. Han
2. J. G. M.
3. Raven Aachen

   Naturalis Biodiversity Center

   Affiliation as printed

   Research Associate, Naturalis Biodiversity Center, Leiden, The Netherlands. E-mail: han. raven @ naturalis. nl; https: // orcid. org / 0000 - 0002 - 5305 - 0795

4. David J. Marshall

   Universiti Brunei Darussalam

   Affiliation as printed

   Environmental and Life Sciences, Faculty of Science, Universiti Brunei Darussalam, Brunei Darussalam. https: // orcid. org / 0000 - 0003 - 3771 - 5950 * Corresponding author. E-mail: david. marshall @ ubd. edu. bn