scholarly journals Satunarcus, a new late Cambrian trilobite genus from southernmost Thailand and a reevaluation of the subfamily Mansuyiinae Hupé, 1955

2020 ◽  
Vol 94 (5) ◽  
pp. 867-880
Author(s):  
Shelly J. Wernette ◽  
Nigel C. Hughes ◽  
Paul M. Myrow ◽  
Apsorn Sardsud
Keyword(s):  
North China ◽  
New Genus ◽  
Sedimentary Rocks ◽  
Cladistic Analysis ◽  
New Genus And Species ◽  
Natural Group ◽  
Middle Cambrian ◽  
Current Definition ◽  
Late Cambrian ◽  
Cambrian Trilobite

AbstractThe Ao Mo Lae Formation of the Tarutao Group crops out on Thailand's Tarutao Island and contains a diverse assemblage of late Furongian trilobite taxa, including several endemic forms. This study presents a new genus and species, Satunarcus molaensis, discovered at two locations on the island. A cladistic analysis of the kaolishaniid subfamily Mansuyiinae in light of Satunarcus and similar genera known from across upper Cambrian equatorial Gondwanan rocks suggests that the subfamily is polyphyletic in its current definition, and thus is not a natural group. Separating Mansuyia Sun, 1924 from the other taxa conventionally placed in Mansuyiinae permits recognition of a previously unrecognized monophyletic subfamily Ceronocarinae new subfamily. As established herein, this kaolishaniid subfamily contains Satunarcus n. gen. and all genera previously recognized as Mansuyiinae. with the exception of Mansuyia itself. Ceronocarinae n. subfam. occur in middle Jiangshanian to middle Cambrian Stage 10 sedimentary rocks from Australia, South China, North China, and Sibumasu, with most genera endemic to Australia.UUID: http://zoobank.org/618c5136-73f0-4912-a7d3-e56559d2a76c

The limits of the family Evaniidae (Insecta: Hymenoptera) and a new genus from Lebanese Amberamber

2002 ◽  
Vol 33 (1) ◽  
pp. 23-34 ◽  
Author(s):  
Hasan H. Basibuyuk ◽  
Mike G. Fitton ◽  
Alexandr P. Rasnitsyn ◽  
Donald L.J. Quicke
Keyword(s):  
Fore Wing ◽  
New Genus ◽  
Cladistic Analysis ◽  
Wing Venation ◽  
New Genus And Species ◽  
Ground Plan ◽  
The Family ◽  
Definition Of

AbstractThe definition of the family Evaniidae is revised and Cretevaniidae are synonymised with Evaniidae based on evidence derived from recently described Mesozoic taxa and a new genus and species, Lebanevania azari, described here from Lebanese amber. A fore leg with a long trochanter and a 12-segmented antenna are autapomorphies of the new genus. A large, high and wide head and a high and short mesosoma are derived characters shared with other Evaniidae. The new genus also has complete fore wing venation and lacks a tubular petiole, which are ground plan features of the Evanioidea. A cladistic analysis of fossil and extant members of the superfamily Evanioidea and notes on fossil taxa are presented.

New Monoplacophora (Mollusca) from Late Cambrian and Early Ordovician of Missouri

1986 ◽  
Vol 60 (3) ◽  
pp. 606-626 ◽  
Author(s):  
Bruce L. Stinchcomb
Keyword(s):  
New Species ◽  
New Genus ◽  
New Genera ◽  
New Genus And Species ◽  
Upper Cambrian ◽  
Early Ordovician ◽  
New Family ◽  
Late Cambrian ◽  
Lower Ordovician ◽  
A New Species

Fourteen new species and six new genera of the molluscan class Monoplacophora are described from the Upper Cambrian Potosi and Eminence formations and the Lower Ordovician Gasconade Formation of the Ozark Uplift of Missouri and some new biostratigraphic horizons are introduced. A new superfamily, the Hypseloconellacea nom. trans. Knight, 1956, and a new family, the Shelbyoceridae, are named. The genus Proplina is represented by five new species: P. inflatus, P. suttoni from the Cambrian Potosi Formation, P. arcua from the Cambrian Eminence Formation and P. meramecensis and P. sibeliusi from the Lower Ordovician Gasconade Formation. A new genus and species in the subfamily Proplininae, Ozarkplina meramecensis, is described from the Upper Cambrian Eminence Formation. Four new monoplacophoran genera in the superfamily Hypseloconellacea and their species are described, including: Cambrioconus expansus, Orthoconus striatus, Cornuella parva from the Eminence Formation, and Gasconadeoconus ponderosa, G. waynesvillensis, G. expansus from the Gasconade Formation. A new genus in the new family Shelbyoceridae, Archeoconus missourensis, is described from the Eminence Formation and a new species of Shelbyoceras, S. bigpineyensis, is described from the Gasconade Formation.

Phylogenetic analysis of the genus Corotoca, with description of a new genus and species from Brazil (Coleoptera, Staphylinidae, Aleocharinae)

2020 ◽  
pp. 1-45
Author(s):  
Bruno Zilberman
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Species Identification ◽  
New Genus ◽  
Cladistic Analysis ◽  
Sister Group ◽  
Exhaustive Search ◽  
New Genus And Species ◽  
A New Species

Corotoca is a strictly Neotropical genus of termitophilous beetles associated with termites of genus Constrictotermes. A cladistic analysis based on 13 terminal taxa and 60 characters (57 morphological and three behavioral) was conducted. The exhaustive search with equally weighted characters resulted in two most parsimonious trees with 95 steps. Spirachtha is proposed to be the sister group of the monophyletic “subgroup Corotocae” (Corotoca + Cavifonexus gen. nov.), based on eleven synapomorhphies (ten exclusive and one homoplastic). The monophyly of Corotoca is supported here, including six species associated with Constrictotermes cyphergaster: (Corotoca hitchensi sp. nov + (C. melantho + C. pseudomelantho sp. nov.) + ((C. fontesi + (C. phylo + C. araujoi)). A new genus, Cavifronexus gen. nov., is proposed to two species associated with Constrictotermes cavifrons (Holmgren, 1910): Cavifronexus guyanae comb. nov., from Guyana and Brazil, previously described as Corotoca; and a new species, Cavifronexus papaveroi sp. nov., from Brazil. This work also includes descriptions, redescriptions, and illustrations for all species and genera. Keys for genera and species identification in “subgroup Corotocae” are also provided.

A new genus and species of Coenosiini from Bolivia (Diptera: Muscidae: Coenosiinae)

Zootaxa ◽  
2008 ◽  
Vol 1879 (1) ◽  
pp. 57 ◽  
Author(s):  
MÁRCIA SOUTO COURI
Keyword(s):  
Equilateral Triangle ◽  
New Genus ◽  
Hind Tibia ◽  
Cladistic Analysis ◽  
The Other ◽  
New Genus And Species ◽  
Apical Seta ◽  
Old World

The Coenosiini include 16 genera and 223 species according to the last Neotropical catalogue (Carvalho et al. 2005).  Couri and Pont (2000) confirmed the monophyly of this tribe on the basis of one synapormorphy: position of the three katepisternal setae, equidistant from each other and placed at the points of an imaginary equilateral triangle. In their cladistic analysis, the Coenosiini genera were divided into two groups. One was basal and defined by the presence of a posterodorsal apical seta on the hind tibia, presence of both arms on male sternite 6 (but not forming a ring) and a short female ovipositor. Nine valid genera were included in this group, mainly distributed throughout the Old World.  The second group was defined by the presence of a well developed epiproct and narrow sternites 6 and 7 in the female ovipositor. The other seven genera of the tribe were included in this clade.

Systematics and paleoecology of Late Cambrian echinoderms from the western United States

1997 ◽  
Vol 71 (6) ◽  
pp. 1091-1109 ◽  
Author(s):  
Colin D. Sumrall ◽  
James Sprinkle ◽  
Thomas E. Guensburg
Keyword(s):  
United States ◽  
Great Basin ◽  
Rocky Mountains ◽  
New Genus ◽  
Western United States ◽  
New Genus And Species ◽  
Late Cambrian ◽  
Lower Ordovician ◽  
Single Piece ◽  
Low Diversity

Although echinoderm debris is locally common, articulated specimens are rare in Late Cambrian rocks from the Great Basin and Rocky Mountains of the western United States and are mostly associated with hardgrounds. The fauna, including cornute stylophorans, trachelocrinid eocrinoids, solute homoiosteleans, and rare edrioasteroids, includes several members of the archaic Cambrian Evolutionary Fauna, which had already passed its maximum diversity for echinoderms. In addition to the low diversity, articulated specimen abundance is very low, averaging only about one-tenth that found in overlying Lower Ordovician units. The transition between the Cambrian and Paleozoic Evolutionary Faunas for echinoderms in North America apparently occurred rapidly very close to the Cambrian-Ordovician boundary, because no unequivocal examples of the Paleozoic fauna (such as crinoids, glyptocystitid rhombiferans, asteroids, or echinoids) were found in the Late Cambrian sections.New taxa include several cothurnocystid stylophorans assigned to Acuticarpus delticus, new genus and species, Acuticarpus? republicensis, new species, and Archaeocothurnus goshutensis, new genus and species; Scotiaecystis? species, a poorly preserved cornute stylophoran with lamellipores; Minervaecystis? species, a fragmentary solute homoiostelean based on several steles; Tatonkacystis codyensis, new genus and species, a well-preserved trachelocrinid eocrinoid with five unbranched arms bearing numerous brachioles; an unnamed, poorly preserved, epispire-bearing eocrinoid; an unnamed, poorly preserved, globular eocrinoid? lacking epispires; and an unnamed, heavily weathered, edrioasterid edrioasteroid. Nearly all holdfasts found in these Upper Cambrian units are single-piece blastozoan types, probably belonging to trachelocrinid and other eocrinoids. Distinctive columnals and thecal plates of several additional undescribed eocrinoids and other echinoderms were locally abundant and are also described.

Ordovician (Whiterock) calymenid and encrinurid trilobites from the Precordillera of Argentina

1998 ◽  
Vol 72 (4) ◽  
pp. 678-697 ◽  
Author(s):  
Gregory D. Edgecombe ◽  
Brian D. E. Chatterton ◽  
Beatriz G. Waisfeld ◽  
Norberto E. Vaccari
Keyword(s):  
New Species ◽  
New Genus ◽  
General Pattern ◽  
Cladistic Analysis ◽  
San Juan ◽  
New Genus And Species ◽  
Subjective Synonym

Phacopida from upper Whiterock (Lower Caradoc) horizons in the Las Aguaditas Formation of San Juan Province, Argentina, include the calymenid Platycalymene trapezoidalis (Baldis and Pöthe, 1995) and the encrinurids Frencrinuroides edseli new species, Lasaguaditas oweni new genus and species, and Walencrinuroides? new species A. Sulcocalymene Baldis and Pöthe, 1995, a purported subgenus of Flexicalymene, is a junior subjective synonym of Platycalymene Shirley, 1936. Platycalymene is now known from Avalonia, Baltica, Laurentia (Scotland), and the Precordillera. Emending the cladistic analysis of Ordovician Encrinurinae by Lespérance and Desbiens (1995), the monophyly and membership of Frencrinuroides and Walencrinuroides are ambiguous. Frencrinuroides edseli is closely related to species from eastern Laurentia. Lasaguaditas new genus is superficially cybelinid-like in some respects but shares several derived characters with the Encrinurinae. All three encrinurinid species in the Las Aguaditas Formation possess two instars in the protaspid period, a general pattern in Ordovician encrinurinid ontogeny.

Ontogeny of a New Species of the Cambrian Series 3 (Middle Cambrian) Trilobite GenusLiostracinaMonke, 1903 from North China and the Taxonomic Position of the Superfamily Trinucleoidea

2014 ◽  
Vol 88 (2) ◽  
pp. 395-402 ◽  
Author(s):  
Tae-Yoon S. Park ◽  
Ji-Hoon Kihm ◽  
Imseong Kang ◽  
Duck K. Choi
Keyword(s):  
New Species ◽  
Evolutionary History ◽  
North China ◽  
Sister Group ◽  
Shandong Province ◽  
Taxonomic Position ◽  
Traditional Concept ◽  
Middle Cambrian ◽  
Cambrian Trilobite ◽  
A New Species

The Order Asaphida was grouped by the presence of a ventral median suture and a globular protaspis. The Superfamily Trinucleoidea has been assigned to the Order Asaphida, based on the recognition of a globular protaspis in the Ordovician representatives of the group, and the presence of a ventral median suture in the middle Cambrian genusLiostracinawhich has been regarded as a primitive sister-group to the post-Cambrian trinucleoideans. Recent studies demonstrate that the ventral median suture and the globular protaspis could have evolved multiple times in the trilobite evolutionary history, casting doubt on the traditional concept of the Order Asaphida. Inclusion of the Trinucleoidea into the Order Asaphida, therefore, has to be tested. It has recently been revealed thatLiostracina simesiJago and Cooper, 2005 did not possess a ventral median suture, implying that there could have been variable types of ventral suture within the genusLiostracina. Here we report the ontogeny ofLiostracina tangwangzhaiensisn. sp. from the Cambrian Series 3 (middle Cambrian) strata of Shandong Province of North China. The material for this study includes protaspides, which are of flat, benthic morphology, contrasting to the globular protaspid morphology of the Ordovician trinucleoideans. The benthic protaspid morphology ofL. tangwangzhaiensisindicates an independent evolution of the globular protaspis within the Superfamily Trinucleoidea. Together with the variable types of ventral suture within the genusLiostracina, the benthic protaspid morphology ofLiostracinaleads us to propose that the Superfamily Trinucleoidea be excluded from the Order Asaphida.

Middle Cambrian fossils from Tizi N'Tichka, the High Atlas, Morocco. Part 1. Introduction and trilobites

1997 ◽  
Vol 71 (4) ◽  
pp. 620-637 ◽  
Author(s):  
Gerd Geyer ◽  
John M. Malinky
Keyword(s):  
New Species ◽  
New Genus ◽  
New Genus And Species ◽  
Middle Cambrian ◽  
High Atlas ◽  
Strong Affinity ◽  
Central High ◽  
Central High Atlas

New finds of the trilobitesCobboldites tichkaensisGeyer, 1988,Pseudocobboldia pulchra(Hupé, 1953),Protolenus(Protolenus)densigranulatusGeyer, 1990,Latoucheia(Latoucheia)tichkaensisHupé, 1953, andAcanthomicmacca neltneriHupé, 1953, from the basal Middle Cambrian near the peak of Tizi n'Tichka in the central High Atlas, Morocco, supplement the known morphology of these species; the trilobitesAcanthomicmaccanew species,Oreisator tichkaensisnew genus and species, and“Parasolenopleura”sp. from that locality are new.Acanthomicmacca neltneriis the first species of the genus and family that is described and figured in detail in terms of morphologic plasticity and ontogeny;Oreisator tichkaensisis the first ptychopariacean trilobite formally described and based on material from Africa. Trilobites and other fossils from the locality suggest a strong affinity to other Mediterranean and to Avalonian faunas, which is well supported by helcionelloid and hyolith genera.

A new pachypleurosaur (Reptilia: Sauropterygia) from the Middle Triassic of Monte San Giorgio, Switzerland

1989 ◽  
Vol 323 (1212) ◽  
pp. 1-73 ◽  
Keyword(s):  
New Genus ◽  
Middle Triassic ◽  
Cladistic Analysis ◽  
Morphological Description ◽  
New Genus And Species ◽  
Lower Jaw ◽  
Jaw Mechanics ◽  
The Status ◽  
Mode Of Life ◽  
Aquatic Mode

Pachypleurosaur material from the Middle Triassic ‘ Grenzbitumen’-horizon (Anis-Ladin boundary) of Monte San Giorgio, Kanton Tessin, Switzerland, is described as a new genus and species, Serpianosaurus mirigiolensis .A detailed morphological description is followed by a quantitative analysis. The taxon differs from other pachypleurosaurids primarily by its relatively large skull and its straight lower jaw. Rib pachyostosis is absent. In most characters the taxon remains plesiomorphous with respect to other pachypleurosaurs from the Middle Triassic deposits of Monte San Giorgio, which accords well with its early stratigraphic occurrence at that locality. Sexual dimorphism is expressed by the size and shape of the humerus. A cladistic analysis shows the Pachypleurosauridae to constitute the sistergroup of all other Sauropterygia. The Sauropterygia and the Placodontia together form a monophyletic group, the Euryapsida, which is subordinated to the Diapsida and to the Neodiapsida, but which is classifed outside the archosauromorph-lepidosauromorph dichotomy within the Neodiapsida. A concluding paragraph discusses the status of the pachypleurosaurs within the Sauropterygia. Skull structure, and jaw mechanics in particular, suggest a relatively plesiomorph position of pachypleurosaurs within the Sauropterygia. Their adaptation to an aquatic mode of life was not carried to the degree observed in other sauropterygians, and the ability for rapid and deep dives seems to have been limited by middle-ear structure.

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