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Taxon profile

species

Trigonaphera dekkeri Verhecken, 2018

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Neogastropoda »  family Cancellariidae »  genus Trigonaphera

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Trigonaphera dekkeri

Author: Verhecken, A.

Taxon in country check-lists*

Indian Ocean, Africa: Somalia, Asia: Oman, Yemen

* List of countries might not be complete

Description

The description of this species, recently published in the present journal, needs not be repeated here. Protoconch multispiral: n = 2, d = 0.3-0.5 mm, D = 0.9-1.2 mm, e.h = 0.7-1.2 mm (Verhecken, 2018b: 4; SEM photos Pl. 15, Figs E-F).
Remarks: Several shells in these new samples also show an apparent small fourth columellar fold, between the middle fold and the anterior one, as was already mentioned for the holotype and paratypes 2 and 3 (Verhecken, 2018b)
Most of these shells from Oman are whitish, some with only a narrow, pale brown spiral band beneath the periphery. Some shells have the apertural area tinted pale pink or purplish; it is not certain whether or not this colour shade is embedded in the shell material, or is only a superficial layer of a pigment like 6, 6'-dibromoindigotin, the "mollusk purple", which has not yet been reported for Cancellariidae. The spire is often covered by a very thin white calcareous layer.
Verhecken A - 2020 - New and poorly known species of Cancellariidae from the Indian Ocean and the Western Pacific

Distribution

Somalia (off Mogadishu; Cape Ras Hafun); Yemen, al-Mahrah, Khaysayt (Verhecken, 2018b: 3); and Oman, here reported.
Verhecken A - 2020 - New and poorly known species of Cancellariidae from the Indian Ocean and the Western Pacific
Author: Jan Delsing

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