Popis
Autor: Jan Delsing
Text ID: 93257
Text Type: 1
Page: 0
Založeno: 22.04.2019 18:21:58 - Uživatel Delsing Jan
Language: EN
Odkazová funkce: [[t:1330263,textblock=93257,elang=EN;Popis]]
Two shells from station 245 (5°27.9’S, 39°18.8’E, 463 m depth, in Zanzibar Channel) show similarities with Argyropeza divina due to its glossy appearance and yellowish/white colouring; the protoconch is brown, but incomplete, sculptured with two spiral keels and axial riblets; one shell has up to 19 whorls, of which two belongs to the protoconch, slender, with flat whorls. The teleoconch is sculptured with three rows of tubercles of unequal strength, the first row is the least pronounced, the third row is the most pronounced, the tubercles lay diagonally one above the other and are slightly compressed on the upper side, on the last whorl the tubercles become less pronounced and a fourth row develops between the second and the third row. The smooth spiral cord on the last whorl forms a strong angle, under which a well developed and an underdeveloped cord are visible. The siphonal canal is curved, the peristome expanded, under which a short siphonal canal is present. Height 11 mm, diameter 2 mm.
Diagnosis
Lectotype height 10.3 mm. Shell very slender and pointed. Teleoconch of 17 whorls, which have two spiral cords with pointed tubercles. A subsutural weakly tubercled spiral cord is present, while a fine suprasutural smooth cord is present, but poorly visible. The last whorl has a fourth smooth strong cord, and the base is smooth. The peristome has additional weakly tubercled spiral cords. Apex in the lectotype incomplete, but protoconch clearly multispiral. The two whorls which are present have two strong keels and axial riblets. Teleoconch colour light yellowish, with the very first whorls pure white; protoconch brown.
Remarks
It can be easily distinguished from the following T. sceptrum because of the multispiral protoconch.
Albano, P. & Bakker, P.A.J., 2016, Annotated catalogue of the types of Triphoridae (Mollusca, Gastropoda) in the Museum für Naturkunde, Berlin, with lectotype designations
Rozšíření
Autor: Jan Delsing
Text ID: 93258
Text Type: 3
Page: 0
Založeno: 22.04.2019 18:23:05 - Uživatel Delsing Jan
Language: EN
Odkazová funkce: [[t:1330263,textblock=93258,elang=EN;Rozšíření]]
East-Africa. Zanzibar-Channel. Tanzania.
Albano, P. & Bakker, P.A.J., 2016, Annotated catalogue of the types of Triphoridae (Mollusca, Gastropoda) in the Museum für Naturkunde, Berlin, with lectotype designations