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Trigonaphera amakusana (Petit, 1974)

říše Animalia - živočichové »  kmen Mollusca - měkkýši »  třída Gastropoda - plži »  řád Neogastropoda »  čeleď Cancellariidae - kancelárkovití »  rod Trigonaphera

Vědecká synonyma

Scalptia amakusana Petit, 1974
Cancellaria costifera Sowerby, 1833
Trigonaphera costifera Habe, 1961

Obrázky

Trigonaphera amakusana

Autor: Hemmen, J.

Taxon v check-listech zemí*

* Výčet zemí nemusí být kompletní

EN  

Popis

Protoconch deviated paucispiral, smooth, brown, of just over two whorls. Teleoconch begins with sudden appearance of strong axial ribs, crossed by fine spirals. Adult specimens have approximately 4,5 whorls in the teleoconch. Shell somewhat turriculate, with well defined shoulders, suture appressed. Sculpture consists of seven or eight strong axial ribs per whorl, forming sharp angles on the shoulder and continuing across the flat shoulder to the suture. Spiral sculpture of numerous fine spiral cords which form minute nodes where they cross the ribs. Aperture ovate-trigonal, outer lip rounded with about ten lirations within, the strongest of which is located just beneath the shoulder at the posterior end of the aperture. Siphonal canal short, rounded. Three columella plaits, on an almost straight pillar, the posterior one being largest and the anterior one forming a keel bordering the siphonal canal. Umbilicus chink-like. Color of shell bluish-gray, with narrow continuous yellow band around the center of the body whorl, and with yellow maculations on the shoulder. Axial ribs usually light brown crossed by yellow spirals which appear only on the ribs.
The specimen selected as type has a height of 14.4 mm, and greatest diameter of 7.4mm. The type has been deposited in the U.S. National Museum, number 704209. The specimen figured by HABE is designated as a paratype, and is in the National Science Museum, Tokyo. Other para types remain in the writer's collection, and will be distributed to various institutions.
This species is known only from 10-30 meters depth, off Tomioka, Amakusa Islands, Kumamoto Pref., Kyushu, Japan, which is the type locality.
Petit, R.E., 1974. Notes on Japanese Cancellariidae.

Odkazy a literatura

EN Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [jako Trigonaphera amakusana (Petit, 1974)]
Datum citace: 22. listopad 2013

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