Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 26. 2008. (Budapest, 2008)
Genus Katosira KOKEN, 1892 Type species: Katosira fragilis KOKEN, 1892 Katosira periniana (D'ORBIGNY, 1853) (Figure 84: E-I) 1853: Chemnittriaperiniana D'ORB. — D'ORBIGNY p. 36 pi. 243. figs 1-2. pars 1861: Cbemnitvga undulata BF.NZ — STOLICZKA, p. 163, pl. 1, fig. 1. 1983: Katosira periniana (D'ORBIGNY, 1853) — SZABÓ, p. 31, pi. 2, fig. 3. 1997: Katosira periniana (D'ORBIGNY, 1853) — FlSCI 1ER & WEBER, p.14, pl.l, fig. 5. Material — Two specimens from the Bakony Mts (HGM) and two from the Hierlatz Alpe (GBa 2008/69/1/2/1-2). Measurements H III. HP D W AA AL Figure 84: E-F, H (HGM) - *17.5 *11 - - 15° Shape — Turriculate shell of conical outline and high number of whorls, being moderately convex in juvenile and feebly convex in later growth stages, respectively. Suture feebly impressed on juvenile whorls, but flush subsequently. Distinct angulation runs at basal margin, corresponding to periphery in this species. Base itself conical with somewhat concave outline where inclining to columella. Peristome quadrangular with rudimentary outlet at foot of columella, and thin, narrow parietal callosity 7 . Sculpture — Whorls and base divided into bands by spiral grooves. Number of striae hardly increases with growth, rather their distance grows. Angulation of basal margin accentuated by carina. Growth lines somewhat opisthocyrt on whorls and orthocline on base. Only whorls ornamented with low, collabral ridges, being more regular and rib-like on juvenile whorls. Ribs become flattened during growth. Inner moulds show traces of these latter elements only. Ridges in later growth stages seem to be in surface of cone determined by suture, while furrows between their pairs sunken below this surface Remarks — For distinction of this form from Pseudokatosira undulata (BENZ), which also occurs in the Bakony Mts, see above. Katosira carusensis (D'ORBIGNY, 1853) has much smaller spiral angle (8°) and more convex whorls. However, unfortunately, D'ORBIGNY's types show less characters than his drawings. From the Hierlatz Alpe fauna, Katosira suessii (STOLICZKA, 1861) has much smaller adult size, much wider spiral angle, deeper suture and different ornament (marked ribs on whole shell, only two spiral threads). Distribution — Normandy (France), Middle Liassic; Hallstatt, Hierlatz Alpe, Upper Sinemurian (Oxynotum Zone); Lókút, Kericser (Bakony Mts), Upper Pliensbachian (Stokesi Zone). Katosira suessii (STOLICZKA, 1861) (Figure 85) 1861: CbemnifinaSuessii'STOL. — STOLICZKA,p. 163, pl. 1, fig. 2. Lectotype — GBa 2008/69/2/1 (selected here). Material — Seven more or less fragmentary specimens; no undamaged protoconch and peristome found. Measurements H HL lectotype *10 *4.5 HP I) • 4 Shape — Moderately turriculate, conical shell with convex whorls and slightly impressed suture. Top of convexity (=periphery) somewhat below midwhorl. Suture following angular peripher} 7 of convex, anomphalous base; this line bearing also strong spiral cord or carina. Fragments suggest subcircular peristome and circular aperture. Sculpture — Except youngest visible whorl of figured specimen (lectotype), all whorls covered by dense, feebly parasigmoidal, suture to suture collabral ribs (22—24/last whorl). Between peripheral carina/cord and midwhorl, two spiral threads also visible; they bear also tubercles at crossing points with ribs. Further (10—12), equally strong spiral threads cover base. Remarks — The earliest visible but poorly preserved whorl is probably part of the protoconch. It does not seem to be ribbed but bears two spiral threads above the suture. Distribution — Hallstatt, Hierlatz Alpe, Upper Sinemurian (Oxynotum Zone). AA 25° AL 25° Figure 85 — Katosira suessii (STOLICZKA, 1861), lectotype. — 2 a-b: copy of the original figures from STOLICZKA (1861) Tafel I; A-B: the lectotype, A = x 1, B = x2.5.
