Early Ordovician ostracods from Argentina: their bearing on the origin of binodicope and palaeocope clades

2007 ◽  
Vol 81 (6) ◽  
pp. 1384-1395 ◽  
Author(s):  
María José Salas ◽  
Jean Vannier ◽  
Mark Williams

New species of ostracods are described from the Tremadoc of the Cordillera Oriental (Argentina). These are among the earliest well-documented records of Ostracoda sensu stricto. The ostracod assemblages are sourced from shallow marine clastics and are dominated by palaeocopes (Eopilla waisfeldaen. sp.,Nanopsis coquenan. sp.), and the binodicopeKimsella luciaen. gen. and sp.EopillaandKimsellashow affinities with species from paleocontinental Gondwana (e.g., Ibero-Armorica, Turkey, Australia, Carnic Alps), butNanopsisis previously known only from paleocontinental Baltica. This study confirms that two of the major clades of Ordovician ostracods, namely the Binodicopa and the Palaeocopa, were already geographically widespread during the late Tremadoc, suggesting a still earlier origin for these groups, possibly from within the Cambrian to Early Ordovician Bradoriida. Evidence from soft-part anatomy indicates that phosphatocopids, the other group hypothesized to be ancestral ostracods, have apomorphies that preclude them as direct ancestors. The origin of ostracods is more likely to be found within the Bradoriida, a probable polyphyletic group that resembles Early Ordovician ostracods in the external sculpture of their bivalved carapace. Evidence from carapace morphology suggests that the ancestors of true ostracods might lie within the bradoriid groups Beyrichonidae and Hipponicharionidae, a hypothesis that can only truly be tested when more evidence from fossilized soft tissues becomes available.

1980 ◽  
Vol 112 (S112) ◽  
pp. 1-92 ◽  
Author(s):  
D.D. Munroe ◽  
Ray F. Smith

AbstractThe systematics of Acalymma sensu stricto of North America including Mexico are revised. Acalymma sensu stricto is defined and distinguished from the other species groups of Acalymma. Sixteen species are discussed including four new species: A. blomorum, A. palomarense, A. invenustum, and A. luridifrons all from Mexico. Three new subspecies of A. blandulum (LeConte) are described: blandulum (LeConte) new status, nigriventre, and yucatanense. Acalymma coruscum costaricense Bechyné is placed as a synonym of A. innubum (Fabricius). Keys are presented to all species and subspecies. Habitus and male genitalia drawings are given for all species and distribution maps are given where appropriate.


2000 ◽  
Vol 74 (2) ◽  
pp. 230-246 ◽  
Author(s):  
Carrie E. Schweitzer ◽  
Rodney M. Feldmann

Analysis of dorsal carapace characters of fossil and extant genera of the Calappidae sensu lato supports Bellwood's (1996) assignment of the group into four families based upon phylogenetic analysis, which was also supported by previous larval and morphologic studies. The Calappidae sensu stricto, Matutidae, and Hepatidae, recognized by Bell wood (1996), embrace both fossil and extant genera. The Orithyiidae is known from a single extant genus. Additionally, the Necrocarcininae Förster, known only from extinct genera, is elevated to family status. New taxa includeMursia aspinaandEriosachila rossi. Zanthopsis rathbunaeKooser and Orr, 1973, is here referred toEriosachila orri, n. comb, and nomen novum. Emended descriptions are given forMursia yaquinensisRathbun, 1926, andNecrocarcinus hannaeRathbun, 1926. Biogeographic analysis indicates that each family has a distinct origination and dispersal history independent of the other families. Ecologic information for each group suggests that climatic preferences for the extant families have either remained relatively stable since the appearance of each family in the Tertiary or were broader in the past.


2017 ◽  
Vol 15 (2) ◽  
Author(s):  
Michael D. Burns ◽  
Marcus Chatfield ◽  
José L. O. Birindelli ◽  
Brian L. Sidlauskas

ABSTRACT Members of the Leporinus desmotes species complex can be distinguished from other barred or banded congeners by the combination of nine distinct black bars across the head and trunk and long, pointed, laterally compressed and upward curving symphyseal dentary teeth. A taxonomic reassessment of this complex revealed two new species, one from the Orinoco and Negro rivers of Venezuela and Brazil, and the other from the Xingu and Tapajós rivers of Brazil. Both species are similar to L. desmotes and L. jatuncochi, but differ significantly in body shape morphology, coloration, and/or circumpeduncular scale counts. Genetic evidence also contributes to the recognition of both new species. This contribution also maps the geographic distribution of the four known species, and highlights the presence of an unusual meristic polymorphism within Leporinus desmotes sensu stricto that may suggest the presence of even more unrecognized diversity.


2001 ◽  
Vol 75 (5) ◽  
pp. 972-984 ◽  
Author(s):  
Luis Carlos Sánchez De Posada ◽  
Beate Fohrer

Silicified kirkbyoid ostracodes from the Cantabrian Mountains (Spain) bear a striking resemblance to those of the Carnic Alps (Austria and Italy). The Spanish ostracodes come from the upper part of the Cuera Limestones (Bashkirian-upper Moscovian), which are exposed along the Playa de la Huelga section (Ponga Nappe) in the coastal area of eastern Asturias, northern Spain. These fossils were collected from upper Moscovian limestones deposited in an outer-platform environment. Most of the material from the Carnic Alps was obtained from the Nassfeld Pass area (eastern Carnic Alps), near the Austrian-Italian border, in limestones of the Kasimovian-Gzhelian Auernig Group and the Lower Permian Rattendorf Group. The several Auernig Group limestones that contain silicified ostracodes were deposited in a shallow-marine environment.Despite the differences in age (according to fusulinids and conodonts), these kirkbyoids are very similar and in some cases identical. Coronakirkbya pramolla new species and Kirkbya carniacantabrica new species occur in both areas. Two other pairs of species, Coronakirkbya krejcigrafi Becker, 1978, and Coronakirkbya carina new species, and Aurikirkbya cf. beckeri (Kozur, 1990) and Aurikirkbya carinthica new species, show close affinities, though they are considered to be different species. Most of the species described herein are either very rare or absent in other regions.The close paleobiogeographic relationships between the Cantabrian Mountains and the Carnic Alps, documented previously only by brachiopods, are confirmed.


Author(s):  
Jérôme Constant

A new species of the genus Birdantis Stål, 1863 (Hemiptera: Fulgoridae), B. bhaskarai sp. nov. from Larat Island (Tanimbar), is described. Birdantis collaris (Walker, 1870) stat. rev. and B. trilineata (Schmidt, 1926) stat. rev. are reinstated as valid species, respectively from status of subspecies and as junior synonym of B. delibuta Stål, 1863. These four species, as well as the other one previously described from the Maluku Islands, B. decens Stål, 1863, are illustrated from their type specimens. An identification key, a distribution map, illustrations of habitus and details of male genitalia are provided. The synonymy between Myrilla Distant, 1888 and Birdantis is formally reinstated and all species formerly placed in the subgenus Birdantis (Myrilla) are transferred to Birdantis sensu stricto. Birdantis is transferred to the subfamily Aphaeninae Blanchard, 1847 and now contains eighteen species distributed in Maluku (five species), New Guinea and neighbouring islands (ten species) and Australia (three species).


Phytotaxa ◽  
2021 ◽  
Vol 491 (1) ◽  
pp. 85-91
Author(s):  
ZE-HUAN WANG ◽  
YI WANG ◽  
BAO-LIN LIU ◽  
CHAO-HE WANG ◽  
XIAN-GUO FU

Tetrataenium mianguaqi, a traditionally used medicinal herb in Cangyuan County, SW Yunnan, China, is described as a species new to science and illustrated. Molecular phylogenetic analysis based on nuclear ITS well supports its belonging to Tetrataenium sensu stricto. The new species can be easily distinguished by its unique peltate, palmatilobate basal and lower leaves from the other five Chinese Tetrataenium species.


Zootaxa ◽  
2017 ◽  
Vol 4238 (2) ◽  
pp. 253
Author(s):  
AZZAM ALAHMED ◽  
YOUSIF ALDRYHIM ◽  
MOHAMMED SHOBRAK ◽  
MOHAMED NASSER

Amyrsidea Ewing, 1927 is a genus of chewing lice comprising 52 species, divided into five subgenera: Amyrsidea sensu stricto, Argimenopon Eichler, 1947, Cracimenopon Carriker, 1954, Desumenopon Carriker, 1954 and Numidimenopon Scharf & Price, 1977 (see Price et al. 2003: 86), which parasitise a wide range of hosts belonging to the avian order Galliformes (see Price et al. 2003: 321). Species of Amyrsidea can be distinguished from species of Menacanthus Neumann, 1912—the other menoponid genus with species parasitic on the same hosts—by lacking ventral spinous processes in the head (Scharf & Price 1977: 815). Revisions of all subgenera and species of Amyrsidea, including keys for their identification, were published by Scharf & Price (1977, 1983) and Scharf & Emerson (1983, 1984). 


Zootaxa ◽  
2017 ◽  
Vol 4273 (2) ◽  
pp. 177 ◽  
Author(s):  
KLÁRA DÓZSA-FARKAS ◽  
TAMÁS FELFÖLDI

Five Achaeta species (A. affinis, A. bohemica sensu stricto, A. camerani, A. cf. danica, A. unibulba) and a new species, described here as A. tothi sp. n., were found during the investigation of the enchytraeid fauna of western Hungary (Őrség National Park and Kőszeg Mts.). Comparative morphological and molecular taxonomic investigations were performed with several individuals representing these six Achaeta species. A detailed description of the new species is given, and we also present some additional morphological data and photos about the other five Achaeta species. Such information could have importance in subsequent taxonomic studies and will aid the discrimination among the members of genus Achaeta. Furthermore, the obtained sequences could serve as references in forthcoming studies applying DNA-based taxon identification. 


2009 ◽  
Vol 34 (2) ◽  
pp. 324-329 ◽  
Author(s):  
André M. Amorim ◽  
Renato Goldenberg ◽  
Fabián A. Michelangeli

Physeterostemon thomasii is described from the southern Bahian Atlantic forest of Brazil. It differs from the other two species of the genus by the paleaceous trichomes on young stems and petioles, and by the strongly bullate/foveolate leaves. A phylogenetic analysis with all three species, based on rbcL and ndhF DNA sequence data, showed that Physeterostemon forms a monophyletic group, sister to Eriocnema fulva, and this clade is placed in a polytomy at the base of the tribe Miconieae sensu stricto. However, there is no resolution within Physeterostemon, thus the phylogenetic relationships of the three species cannot be established.


Phytotaxa ◽  
2014 ◽  
Vol 183 (1) ◽  
pp. 16 ◽  
Author(s):  
NALIN N. WIJAYAWARDENE ◽  
D. JAYARAMA BHAT ◽  
KEVIN D. HYDE ◽  
E. CAMPORESI ◽  
K. W.T. CHETHANA ◽  
...  

Three coelomycete species with muriform conidia were collected in Italy and subjected to morpho-molecular analyses. In morphology, all species are similar to Camarosporium sensu stricto. Based on morphology, one was identified as C. spartii and the other two taxa are introduced as new species, viz. C. clematidis and C. robiniicola. Maximum likelihood, maximum parsimony and Bayesian analyses of the combined LSU, SSU and ITS dataset show that the three taxa cluster with C. quaternatum, the type species of Camarosporium, with high bootstrap and PP values. All four species can be considered as Camarosporium sensu stricto. Cucurbitaria elongata groups in the Camarosporium clade near to Camarosporium robiniicola and is considered that it is not congeneric with Cucurbitaria sensu stricto (Cucurbitariaceae).


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