Description
Author: Jan Delsing
Text ID: 109042
Text Type: 1
Page: 0
Created: 2021-05-13 22:10:08 - User Delsing Jan
Last change: 2021-05-13 22:10:31 - User Delsing Jan
Language: EN
Text function: [[t:1513997,textblock=109042,elang=EN;Description]]
Shell minute, rounded depressed, suture somewhat prominent, conical, with rounded whorls and impressed suture, white when empty. Dimensions: holotype 3.75 mm in diameter. Smaller shells only 2.5 mm. Protoconch with a little more than 1/2 whorl after the nucleus and a surface with 5-6 spiral irregular threads with some irregular tubercles between them. Diameter of about 300 µm. Teleoconch with 3-3,5 whorls slowly increasing in diameter. Axial sculpture formed by very narrow ribs visible on the adapical part of the whorls, which almost disappear in the periphery but are visible again on the base. These ribs are strongly prosocline, scarcely curved, narrower than their interspaces. Its number is about 33 in the first whorl, about 42 on the second and about 47 in the third. The spiral sculpture is formed by threads, some of them more prominent: the most adapical, which is separated from the suture by a depressed space, forms an elevated shoulder. In this area near the suture one other smaller thread may be present. There are 3-4 more threads in the convexity of the whorls which are more prominent; in the base, one other prominent cord limits the umbilical infundibulum; many small threads are between these larger ones; in total 23 may be present in larger shells, like in the holotype; the smaller ones may present only 15. All these threads are irregularly distributed and are more evident on the periphery of the whorls. On the base there is a wide umbilicus, limited by a prominent border where the axial ribs cross this cord, forming tubercles that go into the umbilicus. Within the umbilical infundibulum there are 7-10 spiral threads that cross the axial ribs, which are much attenuated. Through the umbilicus it is possible to see the previous whorls. Aperture almost circular with a short part in contact with the previous whorl. The border of the aperture is narrow and on it, the end of the spiral threads and the infundibular border of the umbilicus may be seen. Soft parts examined from a retracted specimen show a light uniform cream colour, long and tapered cephalic tentacles, eye stalks reduced, loss of cephalic lappets, various tentaculiform processes around the margin of the buccal disk, the foot with two prominent anterior lateral expansions and a small number of small micropapille and epipodial tentacles. Operculum corneus, fine, multispiral, slightly depressed externally and with numerous evident radiating lines; internally smooth with an ovoid insertion trace. Yellowish periostracum partly lost in most of the specimens examined. The shell with the animal inside presents a cream colour . Radula typical of the genus, with a triangular rachidian tooth, large, sharply pointed cusp with prominent serrations on either side; three inner lateral teeth similar to the rachidian; outer lateral teeth modified into curved, narrow and elongate blades; marginal teeth well developed, sharp and elongate.
Rolan, E. , Hernandez, J.M. & Deniz, F., 2005. Description of two new species of the genus Solariella (Gastropoda: Trochidae) from Canary and Mauritania
Interchangeable taxa
Author: Jan Delsing
Text ID: 109044
Text Type: 19
Page: 0
Created: 2021-05-13 22:13:09 - User Delsing Jan
Language: EN
Text function: [[t:1513997,textblock=109044,elang=EN;Interchangeable taxa]]
The most similar species in the genus are:
* Solariella bojadorensis (Thiele, 1898) (described in the genus Minolta) is more depressed, the more prominent cord is more separate from the suture and there are two more prominent cords in the periphery.
* Solariella monodi Fischer-Piette & Nickles, 1946 has a more depressed shell, with more prominent spiral cords, lacking of axial ribs.
* Solariella cincta (Philippi, 1836) is larger, more conical, the axial ribs smaller and more numerous, the upper prominent nodular cord is close to the suture and the umbilicus is narrower.
Solariella effosima Locard, 1898 and S. vaillanti (Dautzenberg & Fischer, 1896) have fewer spiral cords and all are very nodular; the same occurs in S. talismani Locard, 1898, S. mogadorensis Locard, 1898 and S. rudecta Locard, 1898.
* Solariella amabilis (Jeffreys, 1865) is more elevated and has a prominent peripheral cord which angulates the rounded profile of the last whorl. The umbilical infundibulum is smaller.
Some species of the genus Lirularia may have a similar shell and the comparison is useful when the soft parts are not examined:
* Lirularia canaliculata (Smith, 1871) has a scarce number of spiral cords, but the upper ones are stronger; the axial ribs are short and prominent, and the umbilical infundibulum is smaller.
* Lirularia antoniae Rubio & Rolan, 1997 has a shell with similar shape but higher, with the protoconch different (smooth and with a helmet shape), the shoulder has a spiral channel below, the spiral thread more evident and the infundibular border not so marked.
Rolan, E. , Hernandez, J.M. & Deniz, F., 2005. Description of two new species of the genus Solariella (Gastropoda: Trochidae) from Canary and Mauritania
Distribution
Author: Jan Delsing
Text ID: 109043
Text Type: 3
Page: 0
Created: 2021-05-13 22:11:30 - User Delsing Jan
Language: EN
Text function: [[t:1513997,textblock=109043,elang=EN;Distribution]]
TYPE LOCALITY
NW. Gran Canaria, I5°50918"W 28o07,31,,N, 180 m.
OTHER MATERIAL STUDIED
1 s, 17 f, NW. Gran Canaria, 200 m (CJH).
Rolan, E. , Hernandez, J.M. & Deniz, F., 2005. Description of two new species of the genus Solariella (Gastropoda: Trochidae) from Canary and Mauritania