Triphora aequatorialis Thiele, 1925

Albano, Paolo G. & Bakker, Piet A. J., 2016, Annotated catalogue of the types of Triphoridae (Mollusca, Gastropoda) in the Museum fuer Naturkunde, Berlin, with lectotype designations, Zoosystematics and Evolution 92 (1), pp. 33-78 : 45-47

publication ID

https://dx.doi.org/10.3897/zse.92.5936

publication LSID

lsid:zoobank.org:pub:71689C6B-D5AB-48CB-8785-8B43999F6379

persistent identifier

https://treatment.plazi.org/id/B312146D-4FCD-804D-ED67-1C2683516DAF

treatment provided by

Zoosystematics and Evolution by Pensoft

scientific name

Triphora aequatorialis Thiele, 1925
status

 

Taxon classification Animalia Caenogastropoda Triphoridae

Triphora aequatorialis Thiele, 1925 View in CoL Figure 13

Triphora aequatorialis Thiele, 1925: 131-132 (97-98), plate XXII (X), figure 27.

Type specimens.

Holotype: ZMB/Moll no. 109278, fixed by monotypy.

Type locality.

"Station 244 [5°55.8' südl. Br., 39°1.2' östl. L., 50 m Tiefe, bei Ost-afrika]" (off Zanzibar, East Africa).

Original description.

Eine schale von derselben Station 244, die wohl verblaßt ist, zeigt noch am oberen Teil der Windungen, etwa an der oberen Knotenreihe, sowie an der Unterseite und am Mundrande braune Färbung, während sie im übrigen weißlich ist, hierin hat sie etwas Aehnlichkeit mit Triphora angasi , die aber schlanker ist; die Art scheint noch nicht bekannt zu sein. Die Schale ist ziemlich breit und etwas rundlich getürmt, die äußerste Spitze fehlt, es sind fast 11 Windungen erhalten, die sämtlich mit 3 Knotenreihen besetzt sind, die nicht sehr dicht stehen, die Knoten liegen übereinander, die letzten Windungen sind deutlich gewölbt und durch eine vertiefte Naht getrennt, die letzte ist kaum kantig, außer den 3 Knotenreihen noch mit 3 Reifen besetzt, von denen die beiden oberen noch knotig sind, der unterste umgibt die Wurzel des etwas gekrümmten Spindelfortsatzes. Mundrand vorgezogen, außen kaum knotig, unten dem Spindelfortsatz genähert, daher ist der Kanal fast geschlossen, Mündung ziemlich klein, rundlich. Höhe 7,5 mm, Durchmesser 2,25 mm.

Translation.

A single shell from Station 244; it shows again brown colour on the upper part of the whorls, on the upper row of tubercles, on the base and on the peristome. The rest is whitish, being in this respect similar to Triphora angasi , which however is more slender. This species seems not to be described yet. The shell is quite broad and rounded. The first whorl is missing, but the shell is composed by 11 whorls, that are totally covered by three rows of tubercles, which are not too dense. The tubercles are one above the other [probably meaning they are aligned vertically]. The lower whorls are clearly rounded and a deep suture separates them. The periphery at the base is a bit angulated. After the 3 tubercled spiral cords, the base has two rows of tubercles, while a faint lower thread is around the base of the bended columella. The peristome is deformed, externally weakly tubercled. The lower margin of the aperture gets very close to the columella, hence the siphonal canal looks almost closed. Aperture quite small, rounded. Height 7.5 mm, diameter 2.25 mm.

Diagnosis.

The holotype is an adult specimen 7.4 mm high. Shell conical with deep sutures. Teleoconch composed by 10 whorls, protoconch missing. Teleoconch sculpture is characterized by three tubercled spiral cords since the very first whorl, the first cord is weaker on the first two-three whorls. A fine suprasutural smooth cord is also visible. The last whorl has a fourth tubercled spiral cord and the base has one more tubercled cord. The peristome has regrown after being broken off, and it is not useful for describing its diagnostic features. Ante rior siphonal canal quite long. Colour whitish, with a faint light brown band as background colour of the first cord. Tubercles usually lighter and whiter than the background colour.

Remarks.

The apex is missing, but the size of the first teleoconch whorl suggests a multispiral apex.

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Family

Triphoridae

Genus

Triphora