Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 96. (Budapest 2004)

Verdcourt, B.: New and little known species of terrestrial Mollusca from East Africa and Congo (Kinshasa)

Diagnosis - Related to Gulella lacuna (PRESTON, 1911) in shape and the slightly detached aperture, but lamellate. There is no material in the Natural History Museum and I am grateful to Dr. R. JOCQUÉ of Musée d'Afrique Central Tervueren for loaning me the holotype. Examination of this has confirmed that the sculpture is of very close ribs, not in any way lamelliform and that the aperture is not so produced as in the new species described below. Shell broadly oblong-ovoid (Fig. 9), small with dome-shaped apex, white but with orange red animal showing through shell, narrowly but distinctly umbilicate. Whorls about 7, the last with the aperture shortly but distinctly detached, strongly convex, the body rounded-angular above; suture strongly impressed. Apical 2 Yi whorls without lamellae but spirally punctate striate, rest with very conspicuous spaced lamellae, 7-11 being visible on each whorl viewed from the front; a few striae present between the lamellae but otherwise smooth; behind the peristome there are + 12 close striae on the detached part. Aperture rounded reniform appearing distinctly two-layered with a thicker more nacreous inner part and a thinner outer part which makes up most of the strongly flared peristome (Fig. 10). Dentition 3-fold; a fairly centrally placed parietal tooth and two opposing inset nodules, one on the columella and the other on outer wall. Dimensions: height 2.6-2.75 mm, breadth 2-2.26 mm; aperture ± 1 mm in diameter. Distribution - Tanzania, Kimboza Forest Reserve. TATTERSFIELD also collected his sp. 'R' in this reserve. Gulella olkokolae ADAM, 1965 (Fig. 12) Gulella olkokolae ADAM, 1965 in Annales du Musée Royal de l'

Afrique Centrede Serie in 8° Sciences Zoologiques no. 138: 34, t. 2, fig. 5; type locality: Tanzania, Mt. Meru, towards NW., Olkokola, Latia gorge, 2700 m (MRAC 789012). Distribution - Tanzania, Mt. Meru. Material examined - Tanzania, Meru Crater, S side, above Usa River, "Átnyergelő rét" (1700 m), 30.1V. 1979, leg. EŐRY & SIPOS (HNHM 93867/4). Gulella pseudolkokolae sp. n. (Fig. 13) Type material - Holotype and paratypes: Tanzania, Kimboza Forest Reserve, (there is Kimboza I. on the label, which probably means the following locality: Kibungo, a spring-fed lake near Mimion), III-IV.1989 leg. MAHUNKA (HNHM 93868 and HNHM 93869/3).