Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 26. 2008. (Budapest, 2008)
Proconulus? cf. galatensis (GEMMELLARO, M., 1911) (Figure 67: M-N) cf. 1911 : Chemnit^ia galatensis G EMM. — GEMMELLARO, AL, p. 236, pi. 9, figs 17-18. 1983: Proconulus? cf. galatensis (GEMMELLARO, M., 1911) — SZABÓ, p. 28, pl. 1, fig. 6 Material — Three fragmentary specimens. Measurements H HL HP Figure 67: M-N 5 3.5 Shape — Trochiform shell of thick wall, with distinctly acute apex. Shell consisting of high number of feebly convex or flat whorls with suture, appearing as narrow groove. Last whorl (related to diameter) higher than previous ones and having rounded periphery. Base convex, without umbilicus. Peristome slightly prosocline, roundish quadrate in outline; edge of outer lip sharp and columellar lip bears small callus, extending towards base. Sculpture — Beyond slightly prosocline growth lines, collabral elements visible only on ju\ r enile shell: tiny, suture to suture riblets. Spiral sculpture shown only on base, consisting of lines, being stronger centrally and fading out, then disappearing at periphery. D W AA AL 5 50° 18° Remarks — The morphology may suggests belonging to Proconulus, except the last whorl, coiling of which significantly differs from that of the pervious ones. This ieature, with associated similar shape, appears in some genera of the Coelostylinidae. However, new, well preserved material is necessary to a more accurate identification. The shape is near to that of the species Chemnit%ia galatensis M . GEMMELLARO, but this form is described as a smooth species. Taking into consideration the weak ornament of the Sümeg specimens, it is possible that the lack of ornamentation is due to preservational causes. Distribution — Galati (E Sicily, Italy), Upper Pliensbachian; Sümeg (Bakony Mts), Upper(?) Sinemurian. Proconulus? kneri (STOLICZKA, 1861) (Figure 68) 1861 : Trochus Kneri Six >L. — Six ILICZKA, p. 172, pi. 2, fig. 2. Lectotype — GBa 2008/69/19/1 (selected here). Material — Two shelly specimens with damaged peristome and poorly preserved protoconch in STOLICZKA's (1861) "originals collection". Measurements H HL HP lectotype 6 4.5 2.4 Figure 68 — Proconulus? kneri (STOLICZKA, 1861) lectotype (A—B) and paralectotype (C). — 5: copy of the original figure from STOLICZKA (1861) Tafel II; A-B: apertural view of the lectotype, A = xl, B =x5; C: dorsal view of the paralectotype (GBa 2008/69/19/2), X5. Shape — Small, thick-shelled species of few (6—7), moderately con\ r ex whorls and impressed suture. Shell outline more or less cvrtoconical. Periphery angular, base convex and having narrow false umbilicus along slightly reflected columellar lip. Peristome continuous but only in adult stage when moderately enlarged and thickened. Broken surface show only thin inducture on D W AA AL 52° 37° parietal wall behind adult parietal lip. Inner lip separated by furrow from base and has rather wide outer face with shallow depression on columellar lip, that probably continued also on basal lip, being not preserved. Aperture changes circular in last growth phase from earlier form. Sculpture — Spiral threads cover whorls and base. Their number remains constant on whorls with increasing sthrength. On central part of base stronger threads visible than on belt of outer half. Single spiral cord running just on top of peripheral angulation. Growth-lines fine and prosocline. Remarks — In Proconulinae, peristome characters belong to the distinctive ones on (sub)generic level. The aboA r e descibed adult peristome modification is suitable to the criteria needed to establish a new (sub)genus. Another species of the same peristome modification has already been found in another material therefore the necessary new genus will be outlined elsewhere. Distribution — Kratzalpe at Golling, Sinemurian (Obtusum Zone).
