Bechala sommeri Ilger & Brauckmann, 2012 enlightens the Namurian griffenfly diversity (Insecta: Odonatoptera: Bechalidae)

2012 ◽  
Vol 43 (2) ◽  
pp. 161-169 ◽  
Author(s):  
André Nel ◽  
Jan-Michael Ilger ◽  
Carsten Brauckmann ◽  
Jakub Prokop
Keyword(s):  
Ecological Niche ◽  
Type Species ◽  
Early Carboniferous ◽  
Sister Group ◽  
Late Devonian ◽  
Group Relationships ◽  
New Diagnosis ◽  
Devonian Age ◽  
Early Late ◽  
High Diversity

Bechala sommeriIlger & Brauckmann, 2012, the type species of the type genus of the early Late Carboniferous (Namurian) family Bechalidae Ilger & Brauckmann, 2012, is redescribed. It does not belong to the order Megasecoptera as previously proposed. The taxon is clearly attributable to Odonatoptera for the typical venation characters as CuA separating from MP obliquely, a true arculus with concave RP and convex MA emerging from a composite vein R+MA, short ScP, and presence of convex intercalaries IR2 and IR1 between the main branches of RP3/4, RP2 and RP1. We transfer this taxon with the monospecific family Bechalidae to Odonatoptera. A new diagnosis is given for Bechalidae and its type genus Bechala. Furthermore, the presence of an oblique subnodal crossvein very far from the ending of ScP and close to the base of RP2 confirms the hypothesis that the subnodus is a structure originally independent of the nodus with a different function in relation to wing tracheation. The Bechalidae are included in a clade (Meganeuridae–Sinierasipteridae–Bechalidae–Lapeyridae–Nodialata), in contrast to a sister group relationships between the two clades Meganisoptera (=Namurotypidae–Paralogidae–Kargalotypidae–Kohlwaldiidae–Meganeuridae) and Odonatoclada (=Lapeyridae–Nodialata), while the potential relationships between the Campylopteridae and the Lapeyridae and Nodialata are rejected. Bechala represents a ‘damselfly-like’ ecological niche in the Namurian, showing the high diversity of the earliest known Odonatoptera, strongly suggesting an Early Carboniferous, if not Late Devonian age for this pterygote clade.

Implications of spore evidence for Late Devonian age of the Piskahegan Group, southwestern New Brunswick

1988 ◽  
Vol 25 (9) ◽  
pp. 1349-1364 ◽  
Author(s):  
D. C. McGregor ◽  
S. R. McCutcheon
Keyword(s):  
New Brunswick ◽  
Eastern Europe ◽  
Volcanic Rocks ◽  
Early Carboniferous ◽  
Surface Expression ◽  
Alluvial Fan ◽  
Late Devonian ◽  
Red Sandstone ◽  
Stratigraphic Position ◽  
Devonian Age

The predominantly volcanic Piskahegan Group has commonly been considered Early Carboniferous, based on its stratigraphic position. However, spores recently discovered in the Carrow Formation, an alluvial fan deposit in the exocaldera facies, indicate that most, if not all, of the group is of Late Devonian (late Famennian) age. The spore assemblage includes several species reported previously from Ireland, Belgium, and eastern Europe, some of them apparently restricted to the southern parts of the Old Red Sandstone Continent in Late Devonian time. Comparison of records of earliest occurrences suggests that the incoming of some species was diachronous. Volcanic rocks of the Piskahegan Group are coeval with post-Acadian, tin–tungsten-bearing granites elsewhere in New Brunswick and are considered the surface expression of plutonism that resulted from Acadian continental collison.

Revision, distribution, and extinction of the Middle and early Late Devonian archaeogastropod genera Floyda and Turbonopsis

1987 ◽  
Vol 61 (5) ◽  
pp. 960-973 ◽  
Author(s):  
Jed Day
Keyword(s):  
United States ◽  
North America ◽  
Type Species ◽  
The United States ◽  
Late Devonian ◽  
Western North America ◽  
Bottom Waters ◽  
Rhenish Slate Mountains ◽  
Oceanic Currents ◽  
Early Late

Large palaeotrochid gastropods of the genera Floyda Webster (1905a) and Turbonopsis Grabau and Shimer (1909) occur in the late Frasnian Lime Creek Formation of Iowa. Floyda concentrica was designated as the type species of Floyda by earlier workers (Webster, 1905a; Knight, 1941), but is a junior synonym of F. gigantea (Hall and Whitfield, 1873). Three of five species and subspecies of Floyda described from the Lime Creek (Floyda concentrica, F. concentrica multisinuata, and F. gigantea depressa) are considered synonyms of the type species F. gigantea; the fifth species, F. gigantea hackberryensis, is here reassigned to the closely related genus Turbonopsis. Both F. gigantea and T. hackberryensis are redescribed using the original types and additional hypotype material from the collections of Charles Belanski.Floyda, first known from late Givetian rocks of the Rhenish Slate Mountains in Germany, is widespread in the United States Midcontinent and western North America by early Late Devonian time. Turbonopsis was endemic to the Appohimchi Subregion of the Eastern Americas Realm prior to the Taghanic Onlap, and appears to have remained so until late Frasnian time when it migrated to western North America.Eustatic sea-level highstands during the Middle and Late Devonian are thought to have breached barriers to migration, allowing both Floyda and Turbonopsis to disperse by prevailing oceanic currents from the United States Midcontinent into western North America during the late Frasnian. The expected oceanic current patterns of the Middle and Late Devonian paleogeographic reconstructions of Heckel and Witzke (1979, figs. 3, 5) adequately account for the known distribution and dispersal of Devonian palaeotrochid gastropods.The Palaeotrochidae underwent extinction prior to the latest Frasnian. Floyda, Turbonopsis, and Westerna became extinct during the onset of the last eustatic deepening event prior to the close of the Frasnian. The extinction of the palaeotrochid gastropods as well as other invertebrate groups may have been the result of restriction or near elimination of shallow warm-water, well-oxygenated shelf habitats by the onlap of cold anoxic bottom waters prior to latest Frasnian time.

THE PETROLEUM GEOLOGY OF THE ONSHORE BONAPARTE BASIN

1981 ◽  
Vol 21 (1) ◽  
pp. 5
Author(s):  
R. Laws
Keyword(s):  
Structural Data ◽  
Early Carboniferous ◽  
Estuarine Sediments ◽  
Late Devonian ◽  
Secondary Porosity ◽  
Western Basin ◽  
Reef Complex ◽  
Basement High ◽  
Devonian Age ◽  
Basin Margin

The Bonaparte Basin formed in the Early-Mid Palaeozoic as a result of divergent left-lateral wrenching within the northeast trending Halls Creek Mobile Zone. The main phase of deposition in the onshore portion of the basin occurred in the Late Devonian to Early Carboniferous, when over 5 000 m of sediments were laid down. Extensive outcrops around the basin margins demonstrate complex facies relationships and the continuance of wrench faulting during deposition.A reef complex of Late Devonian age fringes the western basin margin. In the basin centre, shales and silts of the Bonaparte Beds form the lateral equivalent of the various facies cropping out around the flanks.A northeast trending basement high occurs in the eastern Bonaparte Basin. A barrier reef complex is predicted to cap the ridge with subtidal and estuarine sediments deposited in the shallow water conditions that existed east of the barrier.Oil shows have been encountered in shallow core holes drilled around the basin margins. Source rock analyses have also highlighted the potential of the basinal shales and lagoonal carbonates to produce hydrocarbons. Gas has flowed on test from thin sandstones within the Bonaparte Beds in two of the wells drilled onshore.Reservoirs are predicted to be present in sandstones of the Bonaparte Beds and also where secondary porosity is developed in carbonates, especially those of the reef complex.Although subsurface structural data are sparse, anticlines are mapped from outcrop data and structures related to both faulting and compaction over basement highs are predicted to occur.

Redescription of the genus Chlamydolecanium Goux, 1933 (Hemiptera: Coccoidea: Coccidae) with a discussion of its affinities

Zootaxa ◽  
2011 ◽  
Vol 2965 (1) ◽  
pp. 1
Author(s):  
ISABELLE M. VEA
Keyword(s):  
Type Species ◽  
Original Description ◽  
Sister Group ◽  
Morphological Characters ◽  
Instar Nymph ◽  
Soft Scale ◽  
Incertae Sedis ◽  
Adult Females ◽  
Coccus Hesperidum ◽  
Group Relationships

The monotypic genus Chlamydolecanium Goux (Hemiptera: Coccoidea: Coccidae) is known only from the original collection in Corsica. The original description does not allow definite placement in any of the subfamilies in the Coccidae. Although it had been suggested that it belonged to the Cardiococcinae, no other members of this subfamily were geographically close. The adult female and 1 st -instar nymph of the type species, Chlamydolecanium conchioides Goux are here redescribed. A parsimony analysis was undertaken based on 56 morphological characters of the adult females in 29 taxa (24 genera considered to belong to the Cardiococcinae, plus Parafairmaria bipartita (Signoret), an incertae sedis monospecific genus possibly close to Cardiococcinae, plus the recently described Kenima galilit Ben-Dov plus two other soft scale genera as outgroups (Coccus hesperidum L. and Paralecanium frenchii (Maskell)). This analysis confirmed the placement of the genus Chlamydolecanium within the Cardiococcinae clade, although its sister-group relationships remain unresolved. Its geographic distribution and taxonomic relationships are discussed.

New chonostrophiid brachiopods from the Famennian (Late Devonian) of the Santanghu Basin, Xinjiang, northwest China

2002 ◽  
Vol 76 (2) ◽  
pp. 229-238
Author(s):  
Zhong-Qiang Chen ◽  
Neil W. Archbold
Keyword(s):  
Middle Devonian ◽  
New Genus ◽  
Early Carboniferous ◽  
Northwest China ◽  
Late Devonian ◽  
New Genera ◽  
New Genus And Species ◽  
Early Devonian ◽  
Median Septum ◽  
Devonian Age

Two new genera of the Chonostrophiidae are proposed herein to accommodate the resupinate shells from the Famennian sediments of the Late Devonian in the Santanghu Basin of the Balikun area, Xinjiang Province, northwestern China. Santanghuia santanghuensis new genus and species is distinguishable from other chonostrophiids by the possession of a pair of long dorsal anderidia and absence of a dorsal median septum. Balikunochonetes liaoi new genus and species is distinct because of the presence of a pair of anderidia with secondary anderidia, and a dorsal median septum. Santanghuia new genus is considered to be phylogenetically related to Chonostrophia of late Early to Middle Devonian age, while Balikunochonetes has possibly given rise to Chonostrophiella of Early Devonian age and is a likely ancestor of Tulcumbella of Early Carboniferous age.

Rare representatives of new Late Devonian ammonoids from the Rhenish Mountains and the Montagne Noire

2019 ◽  
Vol 294 (1) ◽  
pp. 71-79
Author(s):  
Dieter Korn ◽  
John D. Price
Keyword(s):  
Type Species ◽  
Late Devonian ◽  
New Genera ◽  
New Family ◽  
Rhenish Mountains ◽  
New Type ◽  
Montagne Noire ◽  
Early Late

The new genera and species of the early late Famennian (Late Devonian) ammonoids Hoevelia schindewolfi n. gen. n. sp. and Beulia wunderlichi n. gen. n. sp. are described from material collected in the Rhenish Mountains and attributed to the new family Hoeveliidae. The genus Falciclymenia Schindewolf, 1923 is revised with the description of the proposed new type species Falciclymenia cabrierensis n. sp. from the Montagne Noire.

scholarly journals Isolated pliosaurid teeth from the Albian–Cenomanian (Cretaceous) of Annopol, Poland

2017 ◽  
Vol 67 (3) ◽  
pp. 393-403 ◽  
Author(s):  
Daniel Madzia ◽  
Marcin Machalski
Keyword(s):  
Cross Section ◽  
Late Cretaceous ◽  
Type Species ◽  
Late Jurassic ◽  
Morphological Variability ◽  
Original Material ◽  
Tooth Crown ◽  
Similar Morphology ◽  
Faunal Turnover ◽  
Early Late

AbstractBrachauchenine pliosaurids were a cosmopolitan clade of macropredatory plesiosaurs that are considered to represent the only pliosaurid lineage that survived the faunal turnover of marine amniotes during the Jurassic- Cretaceous transition. However, the European record of the Early to early Late Cretaceous brachauchenines is largely limited to isolated tooth crowns, most of which have been attributed to the classic Cretaceous taxon Polyptychodon. Nevertheless, the original material of P. interruptus, the type species of Polyptychodon, was recently reappraised and found undiagnostic. Here, we describe a collection of twelve pliosaurid teeth from the upper Albian-middle Cenomanian interval of the condensed, phosphorite-bearing Cretaceous succession at Annopol, Poland. Eleven of the studied tooth crowns, from the Albian and Cenomanian strata, fall within the range of the morphological variability observed in the original material of P. interruptus from the Cretaceous of England. One tooth crown from the middle Cenomanian is characterized by a gently subtrihedral cross-section. Similar morphology has so far been described only for pliosaurid teeth from the Late Jurassic and Early Cretaceous. Even though it remains impossible to precisely settle the taxonomic distinctions, the studied material is considered to be taxonomically heterogeneous.

scholarly journals Palynological indications for Silurian – earliest Devonian age strata in the Netherlands

2021 ◽  
Vol 100 ◽  
Author(s):  
Alexander J.P. Houben ◽  
Geert-Jan Vis
Keyword(s):  
The Netherlands ◽  
Core Material ◽  
Late Devonian ◽  
Time Interval ◽  
The South ◽  
Early Devonian ◽  
The North ◽  
Depositional Settings ◽  
Palynological Study ◽  
Devonian Age

Abstract Knowledge of the stratigraphic development of pre-Carboniferous strata in the subsurface of the Netherlands is very limited, leaving the lithostratigraphic nomenclature for this time interval informal. In two wells from the southwestern Netherlands, Silurian strata have repeatedly been reported, suggesting that these are the oldest ever recovered in the Netherlands. The hypothesised presence of Silurian-aged strata has not been tested by biostratigraphic analysis. A similar lack of biostratigraphic control applies to the overlying Devonian succession. We present the results of a palynological study of core material from wells KTG-01 and S05-01. Relatively low-diversity and poorly preserved miospore associations were recorded. These, nonetheless, provide new insights into the regional stratigraphic development of the pre-Carboniferous of the SW Netherlands. The lower two cores from well KTG-01 are of a late Silurian (Ludlow–Pridoli Epoch) to earliest Devonian (Lochkovian) age, confirming that these are the oldest sedimentary strata ever recovered in the Netherlands. The results from the upper cored section from the pre-Carboniferous succession in well KTG-01 and the cored sections from the pre-Carboniferous succession in well S05-01 are more ambiguous. This inferred Devonian succession is, in the current informal lithostratigraphy of the Netherlands, assigned to the Banjaard group and its subordinate Bollen Claystone formation, of presumed Frasnian (i.e. early Late Devonian) age. Age-indicative Middle to Late Devonian palynomorphs were, however, not recorded, and the overall character of the poorly preserved palynological associations in wells KTG-01 and S05-01 may also suggest an Early Devonian age. In terms of lithofacies, however, the cores in well S05-01 can be correlated to the upper Frasnian – lower Famennian Falisolle Formation in the Campine Basin in Belgium. Hence, it remains plausible that an unconformity separates Silurian to Lower Devonian strata from Upper Devonian (Frasnian–Famennian) strata in the SW Netherlands. In general, the abundance of miospore associations points to the presence of a vegetated hinterland and a relatively proximal yet relatively deep marine setting during late Silurian and Early Devonian times. This differs markedly from the open marine depositional settings reported from the Brabant Massif area to the south in present-day Belgium, suggesting a sediment source to the north. The episodic presence of reworked (marine) acritarchs of Ordovician age suggests the influx of sedimentary material from uplifted elements on the present-day Brabant Massif to the south, possibly in relation to the activation of a Brabant Arch system.

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