On the species of the genus Selliporella SARTONI & CRESCENTI, 1962 from the Middle Jurassic of the coastal Dinarides of Croatia

Emended diagnosis of the genus Selliporella and its type-species, S. donzellii SARTONI & CRESCENTI is proposed, based on the definitely proven existence of non-ramified branches in the older (basal) part of thallus and their ramifying in its higher (younger) parts. Based on the differences in the morphological characteristics of branches in the upper thallus parts, the type-species has been split into two varieties: S. donzellii var. donzellii SARTONI & CRESCENTI and S. donzellii var. galaeformis n. comb. Selliporella cornutuformis n. sp. is proposed, characterized by distinctly articulated (segmented) and spiky thallus, with each primary branch bearing a bundle of several trichophorous secondaries. Generic attribution of species originally described as Diplopora johnsoni PRATURLON and Triploporella neocomiensis RADOIČIĆ has been reviewed, resulting in their being unified as the same species, which, according to its newly observed morphological characters, has been ascribed to the genus Pseudoclypeina. Because Diplopora johnsoni has been validly described, Triploporella neocomiensis becomes, taxonomically, the younger synonym of Pseudoclypeina johnsoni (PRATURLON) n. comb

On some Salpingoporella species from the Lower Cretaceous of Dinaric karst

In this paper a new species Salpingoporella tari n.sp. is established, found in a sample of Barremian intraclastic grainstone. It is similar to S. annulata (LORENZ) and S. grudii (RADOIČIĆ), but visibly more robust. It has few branches per whorl, and the whorls being spaced far apart. The branches are laterally compressed at their distal ends, therefore being vertically elongated. New fi nding of Salpingoporella cemi (RADOIČIĆ) gave the new data on the variability of the shape of its branches, and on the precise stratigraphic position of the investigated localities. Besides, Salpingoporella patruliusi BUCUR is illustrated, this being its first find outside Monti Apuseni (south Carpathians) and its geographic range thus encompassing also the Dinarides. Also, a large observed number of specimens of Salpingoporella muehlbergii (LORENZ) with ramifi ed thallus makes that feature both its species-specific and generic characteristic. Quite strongly varying values of various biometric parameters, depending on the position on the thallus in one and the same specimen, raises serious questions as to their reliability and usefulness as a distinguishing factor in comparing both the specimens of one and the same species and of species of the same genus

Montenegrella? gracilis n. sp., a new calcareous alga (Dasycladales) from the Upper Barremian of Mt. Biokovo (Dinarides Mts., Croatia)

Montegrella? gracilis n.sp. (Dasycladales) is characterized by thick calcareous envelope and narrow central cavity. Bipartite branches are arranged alternately in consecutive whorls. The primaries are visibly differentiated into a thin, tendril-like stalk in the proximal part and a club-shaped or ellipsoidal inflated swelling in the distal part. The secondaries are poorly visible, of unclear shape and number, with a supposedly common starting point. On the type-locality, the alga occurs within a rich, typically Upper Barremian, algal assemblage. The validity of the genus Montenegrella, being disputed by BARATTOLO (1983), is commented upon by showing the generic attribution of the same or different species either to Suppiluliumaella or to Montenegrella by different authors

Two New Species of Calcareous Algae (Dasycladaceae) from the Upper Dogger of Southern Dalmatia (Croatia)

Two new species of calcareous algae (Dasycladaceae) are described.One - Salpingoporella croatica n. sp. -is characterized by a clyindrical skeleton and undivided, phloiophorous to partly vesiculiferous rarnifications, arranged in whorls. The other species- Uragiella ragusinan.sp. - also has a cylindrical thallus and ramifications arranged in whorls. The shape of the ramifications, however, varies from nodular or tubercular to atypically pyriform and more rarely, to the Uragiellatype. The ramifications are often deformed, which is particularly visible in more distal tangential sections. Both species are found in the same sample which belongs, chronostratigraphically, to the Upper Dogger

Clypeina lagustensis n.sp., a new calcareous alga from the Lower Tithonian of the Lastovo Island (Croatia)

Clypeina lagustensis n.sp. has been found in the Lower Tithonian deposits of the Lastovo Island (Dalmatia, Croatia). It is visually similar, obviously related and in some sections appearing almost identical, to Clypeina jurassica FAVRE, from which it differs by visible swellings and thinning of the central cavity, more pronounced distance between neighbouring whorls of fertile branches, and shape and structure of the interverticillate thallus parts, characterized by having well developed, hairy, sterile branches. These, after emerging from the exit pore, divide into several bundles which form a common turf with a calcareous envelope in the proximal part. Normal 0 21 false false false HR X-NONE X-NONE <!--[endif] --

Robustoconus tisljari n. gen., n. sp., a new larger benthic foraminifer from the Middle Jurassic (Early Bajocian) of the Adriatic Carbonate Platform of Croatia

The new larger benthic foraminifer Robustoconus tisljari n. gen., n. sp. is described from Middle Jurassic (Early Bajocian) high-energy shallow-water limestones of the Dubrovnik area in the south-eastern part of the Adriatic Carbonate Platform. Robustoconus represents a large dimorphic agglutinated foraminiferan with a coarse exoskeleton typical of representatives of the Family Hauraniidae. Differences to the allied genera Spiraloconulus ALLEMANN & SCHROEDER and Bostia BASSOULLET are discussed. The occurrence of a further new genus of larger foraminifera provides additional evidence for a high origination rate in the Middle Jurassic. The restriction of Robustoconus tisljari to the Timodonella sarda taxon-range zone highlights its biostratigraphic interest

Taxonomy and stratigraphy of an algal assemblage in Palaeogene deposits of the northern foothills of Mt. Biokovo (Southern Croatia)

A rich algal assemblage at the Kozica locality, in the northern foothills of Mt. Biokovo, contains, among other forms, Praturlonella salernitana BARATTOLO. In addition, the descriptions of Clypeina bucuri BARATTOLO & ROMANO and C. lucana BARATTOLO & ROMANO are updated, and the originally described Clypeina teakolarae RADOIČIĆ et al., has been tentatively transferred to the genus Falsolikanella GRANIER; hence Falsolikanella? teakolarae n. comb. Falsolikanella? macropora n. sp. is described, characterized by probable metaspondyle growth of clearly phloiophorous branches, differentiated individually into a narrow stalk and very long, markedly widened, outer part. Based on the algal assemblage as a whole, together with benthic and planktonic foraminifers, the stratigraphic position of the algal-bearing level has been defined as Ypresian (lowermost Eocene)