scholarly journals DICTYOCONELLA HENSON, 1948, UPPER CRETACEOUS LARGER BENTHIC FORAMINIFERA: A TAXONOMIC REVISION WITH THE ESTABLISHMENT OF GUSICELLA GEN. NOV. (TYPE-SPECIES DICTYOCONELLA MINIMA HENSON)

2021 ◽  
pp. 3-13
Author(s):  
FELIX SCHLAGINTWEIT ◽  
KOOROSH RASHIDI
Keyword(s):  
Benthic Foraminifera ◽  
Type Species ◽  
Upper Cretaceous ◽  
Taxonomic Revision ◽  
New Combination ◽  
Arabian Plate ◽  
Larger Benthic Foraminifera ◽  
Western Asia ◽  
Mass Extinction Event ◽  
Tarbur Formation

In his monograph on Mesozoic-Cenozoic Larger Benthic Foraminifera from the area of Middle East and south-western Asia, Henson (1948) erected the genus Dictyconella for more or less "compressed-conical" dictyoconids including D. complanata (type-species) and D. minima. Both are however, structurally completely different, e.g. aligned (in the latter) versus alternating structural elements (in the former), and cannot either belong to the same genus or the same subfamily (Dictyoconinae versus Dictyorbitolininae). Therefore, the new genus Gusicella is erected with the type-species Dictyoconella minima, resulting in the new combination Gusicella minima. Gusicella represents the only taxon of the Dictyorbitolininae in the Upper Cretaceous Global Community Maturation Cycle of Larger Benthic Foraminifera (here: conical agglutinated). Due to the revision, Dictyoconella is described as a monospecific genus and an assumed Maastrichtian newcomer which, like Gusicella, became extinct shortly afterwards, namely at the K-Pg boundary mass-extinction event. Both taxa appear to be restricted to the former Arabian Plate of the southern Neotethyan margin. The new data provided are based on material from the Maastrichtian Tarbur Formation of southwestern Iran (Zagros Zone).

scholarly journals BROECKINELLA HENSONI N. SP., A NEW LARGER BENTHIC FORAMINIFERA FROM THE UPPER MAASTRICHTIAN OF IRAN AND A REVISION OF THE GENUS BROECKINELLA HENSON, 1948

2020 ◽  
pp. 57-67
Author(s):  
Felix Schlagintweit ◽  
Koorosh Rashidi
Keyword(s):  
Benthic Foraminifera ◽  
Upper Cretaceous ◽  
Test Chamber ◽  
First Record ◽  
Generic Diagnosis ◽  
Larger Benthic Foraminifera ◽  
Zagros Zone ◽  
Sw Iran ◽  
Tarbur Formation ◽  
Upper Maastrichtian

new larger benthic foraminifera is described as Broeckinella hensoni from the upper Maastrichtian Tar-bur Formation of SW Iran (Zagros Zone). In comparison to the type species of the genus, Broeckinella arabica Henson, which also occurs in the Tarbur Formation, the new species has distinctly larger dimensions (e.g., size and thickness of test, chamber height). The first record of a microspheric specimen of B. arabica shows previously unrecorded annular chambers in the final test stage. Therefore, the generic diagnosis is herein emended. In the Tarbur Formation, both B. hensoni n. sp. and B. arabica occur in foraminiferal-algal wackestones. However, B. arabica occurs in a wider range of microfacies, including packstones and grainstones. It is assumed that Broeckinella originated in the Upper Cretaceous with Broeckinella neumannae Gendrot. The upper Albian Broeckinella aragonensis Peybernès is herein transferred to the porcellaneous genus Peneroplis Montfort.

scholarly journals BROECKINELLA HENSONI N. SP., A NEW LARGER BENTHIC FORAMINIFERA FROM THE UPPER MAASTRICHTIAN OF IRAN AND A REVISION OF THE GENUS BROECKINELLA HENSON, 1948

2020 ◽  
pp. 51-61 ◽  
Author(s):  
FELIX SCHLAGINTWEIT ◽  
KOOROSH RASHIDI
Keyword(s):  
Benthic Foraminifera ◽  
Upper Cretaceous ◽  
Test Chamber ◽  
First Record ◽  
Generic Diagnosis ◽  
Larger Benthic Foraminifera ◽  
Zagros Zone ◽  
Sw Iran ◽  
Tarbur Formation ◽  
Upper Maastrichtian

A new larger benthic foraminifera is described as Broeckinella hensoni from the upper Maastrichtian Tarbur Formation of SW Iran (Zagros Zone). In comparison to the type species of the genus, Broeckinella arabica Henson, which also occurs in the Tarbur Formation, the new species has distinctly larger dimensions (e.g., size and thickness of test, chamber height). The first record of a microspheric specimen of B. arabica shows previously unrecorded annular chambers in the final test stage. Therefore, the generic diagnosis is herein emended. In the Tarbur Formation, both B. hensoni n. sp. and B. arabica occur in foraminiferal-algal wackestones. However, B. arabica occurs in a wider range of microfacies, including packstones and grainstones. It is assumed that Broeckinella originated in the Upper Cretaceous with Broeckinella neumannae Gendrot. The upper Albian Broeckinella aragonensis Peybernès is herein transferred to the porcellaneous genus Peneroplis Montfort.

scholarly journals MAASTRICHTIAN LARGER BENTHIC FORAMINIFERA FROM THE ARABIAN PLATE SENSU LATO: NEW DATA FROM SOMALIA, TURKEY, AND IRAN

2020 ◽  
pp. 69-83
Author(s):  
Felix Schlagintweit
Keyword(s):  
Benthic Foraminifera ◽  
Junior Synonym ◽  
Arabian Plate ◽  
Larger Benthic Foraminifera ◽  
Lithostratigraphic Units ◽  
Valid Taxon ◽  
Tarbur Formation ◽  
Se Turkey ◽  
First Time ◽  
Upper Maastrichtian

Larger benthic foraminifera from the upper Maastrichtian Auradu Formation of Somalia exhibit striking matches with the assemblages from the time-equivalent Tarbur Formation of Iran and other, but less well studied lithostratigraphic units in SE Turkey (e.g., Garzan Fm.). Some taxa, among also new ones, described from Somalia need taxonomic updates (revision, synonymy, re-instatement). Dukhania? cherchii Luger is considered a junior synonym of Acordiella? tarburensis Schlagintweit & Rashidi, and Pseudorbitolina schroederi Luger is re-instated and considered a valid taxon, different from the Campanian P. marthae Douvillé of the western Tethyan domain. The genus Cyclopsinella Galloway is reported for the first time from the upper Maastrichtian of Iran.

scholarly journals <i>Ankumia</i> van Veen, 1932 <i>(nomen dubium):</i> pathological moult retention in the Cytherellidae (Platycopida: Ostracoda)

2003 ◽  
Vol 22 (1) ◽  
pp. 85-99 ◽  
Author(s):  
Peter J. Jones
Keyword(s):  
Outer Layer ◽  
Type Species ◽  
Upper Cretaceous ◽  
Growth Increment ◽  
New Combination ◽  
Monotypic Genus ◽  
Sex Dimorphism ◽  
The Rich ◽  
Oblique Cone ◽  
Dorsal Position

Abstract. The monotypic genus Ankumia is associated with the rich cytherellid fauna described by van Veen (1932) from the Upper Cretaceous (late Maastrichtian) rocks of South Limburg, The Netherlands. The type species (A. bosqueti van Veen, 1932) is redescribed because the genus possesses the enigmatic combination of cytherellid (posterior sex-dimorphism and R/L overlap) and eridostracan (several concentric bands) characters. As no holotype was designated, the redescription is based on a detailed SEM examination of the syntypes in the Bonnema/van Veen composite collection. Most syntypes show that the outer layer of coarse, concentric, rings, which form an oblique cone, are retained moults of a species of cytherellid. The point of retention in the early instars is along the posteroventral margin, contrary to the dorsal position of successive lamellae in eridostracan Cryptophyllus. Other syntypes possess the typical lateral outline of adult species of Cytherellidae. The ontogeny of each individual of retained moults (‘Ankumia’) has a nine-instar pattern, with a growth increment between successive moults about 1.15, slightly less than that (about 1.20) observed by Shaver (1953) for Cytherella bullata. The name Ankumia is abandonned, and a new combination proposed for the previous type species, Platella bosqueti (van Veen, 1932).

scholarly journals Stratigraphy and Sedimentology of Upper Cretaceous to Upper Palaeocene Succession in Zimam Formation Along Wadi Tar al Kabir, NW Libya

2020 ◽  
Vol 9 (2) ◽  
pp. 1
Author(s):  
Esam O. Abdulsamad ◽  
Saleh A. Emhanna ◽  
Muayid B. Asmaeil ◽  
Ahmed A. Alwddani ◽  
Fuad M. Rasheed ◽  
...  
Keyword(s):  
Benthic Foraminifera ◽  
Upper Cretaceous ◽  
Planktonic Foraminifera ◽  
Sedimentary Facies ◽  
Larger Benthic Foraminifera ◽  
Sedimentary Cycles ◽  
Total Range ◽  
Field Investigations ◽  
Sedimentary Cycle ◽  
Nw Libya

The Upper Cretaceous to Upper Palaeocene rocks of the Zimam Formation along the southwestern escarpment of the Hun Graben of NW Libya have been stratigraphically investigated from two stratigraphical sections in wadi Tar al Kabir. The field investigations led to the recognition of three members, from the oldest to the youngest, the Lower Tar Member, the Upper Tar Member and the Had Member. Eight sedimentary facies were distinguished at outcrop-scale and several microfacies were recognized and the outcome indicates that the depositions of the Zimam Formation are corresponding to two transgressive-regressive sedimentary cycles. The first cycle is attributed to the Lower Tar Member in which small planktonic foraminifera is quite common in the Campanian whereas the larger benthic foraminifera, namely, Omphalocyclus macroporus and Siderolites calcitrapoides are abundant in the Maastrichtian. The last occurrence of the latter two taxa, however, was used to delineate the contact between the Maastrichtian and Danian stages in the studied sequence. Up-sequence the sediments of the Upper Tar Member along with the overlying Had Member correspond to the second transgressive-regressive sedimentary cycle. Herein, the Upper Tar Member is enriched by small benthic foraminifera; Neoeponides duwi and Cibicides cf. libycus, and has been ascribed to the Danian (Lower Palaeocene). The reaming sediments of Zimam Formation, however, are belonging to the overlying Had Member and is tentatively ascribed to the Selandian (Upper Palaeocene) based on the last occurrence of the Danian fauna and the total range of the codiacean algae Ovulites morelleti.

A taxonomic revision of the genus Bocatella Villiers, 1948 with redescription and notes on the systematic position of Sphedanolestes nigripennis (Fairmaire, 1858) (Heteroptera: Reduviidae: Harpactorinae)

2012 ◽  
Vol 43 (3-4) ◽  
pp. 283-298
Author(s):  
Dominik Chłond
Keyword(s):  
New Species ◽  
Type Species ◽  
Taxonomic Revision ◽  
Systematic Position ◽  
New Combination ◽  
Undescribed Species ◽  
African Genus

The African genus Bocatella Villiers, 1948 is revised. The type species of Bocatella by original designation is Harpactor nigripennis (non Fairmaire, 1858): Villiers, 1948 (misidentification). A lectotype is designated for H. nigripennis and the new combination Sphedanolestes nigripennis (Fairmaire, 1858), comb.n. is proposed. The taxonomic species Harpactor nigripennis (non Fairmaire, 1858): Villiers, 1948 is recognized as representing an undescribed species and is described as Bocatella nigra sp.n. Since the type species of Bocatella was misidentified, B. nigra sp.n. is fixed as the type species of Bocatella. An additional new species, B. femorata sp.n. is described, both species and S. nigripennis are illustrated, species of Bocatella are keyed. Sphedanolestes fenestriculatus Karsch, 1892, erroneously synonymized with H. nigripennis (non Fairmaire, 1858): Villiers, 1948 by Villiers (1948) is synonymized with H. nigripennis Fairmaire, 1858.

scholarly journals CALVEZELLA, A NEW REPLACEMENT NAME FOR ARAGONELLA CALVEZ, 1989 (TYPE-SPECIES A. MARGINATA), A FORGOTTEN ORBITOLINID FROM THE ALBIAN OF SPAIN

2019 ◽  
pp. 35-36
Author(s):  
FELIX SCHLAGINTWEIT
Keyword(s):  
Type Species ◽  
Taxonomic Revision ◽  
New Combination ◽  
Zoological Nomenclature ◽  
International Code

Calvez (1989) described a new orbitolinid as Aragonella marginata n. gen., n. sp. from the Albian of Spain. The genus name however is a junior homonym of Hantkenina (Aragonella) Thalmann, 1942, an Eocene foraminiferal genus. In accordance with Article 60.3 of the International Code of Zoological Nomenclature (ICZN), the new replacement name Calvezella is introduced for Aragonella Calvez, 1989. This taxonomic revision leads to the new combination Calvezella aragonata (Calvez, 1987) for its only species.

scholarly journals A taxonomic revision of cleistocarpous species of Weissia (Pottiaceae, Bryophyta) in Japan

Phytotaxa ◽  
2017 ◽  
Vol 306 (1) ◽  
pp. 1 ◽  
Author(s):  
YUYA INOUE ◽  
HIROMI TSUBOTA
Keyword(s):  
Type Species ◽  
Taxonomic Revision ◽  
Phylogenetic Inference ◽  
New Combination ◽  
Gene Sequences ◽  
Molecular Phylogenetic ◽  
Rps4 Gene

Four species, including one newly described, of Japanese cleistocarpous species of Weissia (Pottiaceae): W. exserta, W. japonica, W. kiiensis and W. parajaponica sp. nov. are recognized based on molecular phylogenetic inference and morphological reassessment. For each species, typification, description, distribution, illustrations and photographs are presented, and a key to the species is included. Rapid sporophyte modifications in Weissia and monophyletic positions of these four species are supported by the analysis using concatenated chloroplast rbcL and rps4 gene sequences. A lectotype is designated for W. controversa which is the type species of the genus, and a new combination, W. loncophylla is proposed for Trachycarpidium lonchophyllum.

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