Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 26. 2008. (Budapest, 2008)

densely lineated spirally; periodical collabral riblets cross last whorl from upper suture to middle of base. Collabral riblets of base stronger than spiral lines Remarks — The similar size exclude the possibility that the available specimens of Eugclus (Eugclus) sandrae n. sp. would be part of Eugclus (Eugclus) margaritaceus (STOLICZKA, 1861) specimens of different growth stage, thus the ornament also can not be regarded as an ontogenetic modification. Therefore, while the measurements are not markedly different, the onaments provide tools to distinguish these two species; dissimilarity is prominent in the sculpture of the "ramp" belts and of the bases, but the configuradon of the cords and threads on the abapical half of the whorls also offers a good method. Distribution — H all statt, Hierlatz Alpe, Late Sinemurian (Oxynotum Zone). Eucyclus (Eucyclus) sp. (Figure 74: G-J) pars 1861: Chemnit%ia margaritacea STOL. — STOLICZKA, p. 167, pl. 1, fig. 10 a-b. Material — A fragmentary steinkern specimen (2008/69/9/3) from the Chemnit^ia margaritacea STOLICZKA, 1861 box of the "originals collection" in the GBa Museum; it has also some remnants of the shell. Measurements M GBa

2008/69/9/3 HL *13.5 HP *fi D *12.8 *« AA AL 34° Shape — Moderately high conical, thin-walled shell without juvenile part. Whorls convex, rather low and angular below midwhorl; angulation reinforced by nodose spiral cord, nodes reflecting also on inner mould. Ramp above angulation slightly convex. Suture deeply impressed and canaliculate because of near spiral threads, accompanying it. Base moderately convex and anomphalous. Peristome damaged, only straight columellar lip of axial position preserved; its outer face somewhat widened. Sculpture — Below cord on angulation, four further cords visible, suture follows and partly covers lowermost one. Their best preserved parts on penultimate whorl bear also granulae. Ramp of penultimate whorl ornamented by network of spiral and prosocline collabral threads. Traces of some spiral cords found also on outermost belt of base but no more ornamental elements preserved. Remarks — With its significandy wider spiral angle, much lower whorls and different ornament, this species is well distinguishable from the other two specimens from STOLICZKA's (1861) "Chemnitîda margaritacea' syntypes. It seems to represent also a new species, but some further smdies are necessary to be sure. Distribution — Hallstatt, Hierlatz Alpe, Late Sinemurian (Oxynotum Zone). Subgenus Eokutigclus SZABÓ, 1995 Type species: Eugclus (Eokutigclus) urkutensis SZABÓ, 1995 Eucyclus (Lokuticyclus) urkutensis SZABÓ, 1995 (Figure 75: A-D) 1995: Eucyclus (Lokuticyclus) urkutensis sp. n. — SZABÓ, p. 70, pi. 7, figs. 7—9. Material — A single specimen, the holotype (HGM J 11461). M easurements H HL HP holotype *21 *14 *10 Shape — Shell of slightly convex spire outiine ("cyrtoconoidal"). WFiorls themselves also convex, deeply impressed-canaliculate suture separate them. Base strongly convex, umbilical rim rounded angular. This angulation, though no element of peristome preserved, suggests siphonal oudet like modification at foot of "umbilical" lip. Earliest whorls also lacking. Sculpture — Six spiral cords visible on earliest preserved whorl, their number increases to seven at penultimate whorl. On juvenile shell, spiral cords crossed by subregularly repeating, suture to suture collabral cords of same strength as spiral ones. Collabral cords gradually weaken and become shorter from lower suture then restricted to narrow band along uppermorst spiral cord D W AA AL *13 55° 45° on last preserved whorl. In crossing points of cords, small granules sit, which also dissappear short after collabral cords do it. On last preserved whorl, granules present only on two uppermost spiral cords. Base seems also covered by spiral cords, denser than on whorls. Growth lines extremely fine, dense and slightly prosocline with shallow, just visible opisthocyrt sinus above middle of last preserved whorl. Remarks — The available specimen does not seem to represent completely adult stage. More exactly, the shelly part of the base shows that at least another whorl is lacking. The basal cords are almost completely resorbed within the shell as it is shown by the preserved part of the lacking Plast whorl.