A new genus of the subtribe Hermanellina (Ephemeroptera: Leptophlebiidae: Atalophlebiinae) from Northern Brazil with accounts on the systematics of the group

2020 ◽  
Vol 51 (3) ◽  
pp. 472-488
Author(s):  
Frederico F. Salles ◽  
Rafael Boldrini
Keyword(s):  
New Genus ◽  
Cladistic Analysis ◽  
New Taxon ◽  
Systematic Relationship ◽  
Northern Brazil ◽  
Relationship Of

A new taxon of Hermanellonota or subtribe Hermanellina (Ephemeroptera: Leptophlebiidae: Atalophlebiinae) was found from Northern Brazil, in the limits of Pacaraima in Brazil and Santa Helena de Uairén in Venezuela. While nymphs of this taxon are similar to those of the genus Farrodes, the adults could not be assigned to any of the genera included in the group. In order to clarify the systematic relationship of this taxon and to provide a reliable hypothesis concerning its generic placement, we analyzed it using an available matrix from the literature and performed a new cladistic analysis. As a result we describe Rondophlebia rubra gen. nov. et sp. nov. sister to the Perissophlebiodes complex + Hermanella complex. Our analyses also shed new insights on the systematics of Hermanellonota.

scholarly journals Qorimayus, a new genus of relictual, high-altitude harvestmen from western Argentina (Arachnida, Opiliones, Gonyleptidae) reveals trans-Andean phylogenetic links

Zootaxa ◽  
2020 ◽  
Vol 4722 (2) ◽  
pp. 129-156
Author(s):  
LUIS E. ACOSTA ACOSTA
Keyword(s):  
High Altitude ◽  
Endemic Species ◽  
New Genus ◽  
Cladistic Analysis ◽  
Systematic Relationship ◽  
Close Relationship ◽  
Phylogenetic Affinities ◽  
Relationship Of ◽  
Ventral Process

A new genus of Gonyleptidae Pachylinae, Qorimayus gen. nov., is described to place the high-altitude species originally named Parabalta alticola Ringuelet, endemic to Sierra de Famatina, western Argentina. While classical exomorphological features do not separate this new genus from Parabalta Roewer or Pachyloides Holmberg (to which the species was formerly combined), male genitalic features, especially the shape of the ventral process of stylus, differ clearly. In turn, penis morphology suggests the systematic relationship of Qorimayus gen. nov. with the Chilean genera Metabalta Roewer and Nanophareus Roewer. A cladistic analysis was performed to test the phylogenetic affinities of the new genus; 28 terminals were used, comprising selected species of Parabalta, Pachyloides, Metabalta and Nanophareus, as well as other Gonyleptidae to represent the ‘subtropical’ and the ‘Chilean’ opiliofaunistic elements; the most external outgroups included one cosmetid, one metasarcid and one nomoclastid. Results supported the recognition of Qorimayus as an independent genus, and its close relationship with the Chilean genera Metabalta and Nanophareus. A detailed redescription of Qorimayus alticola comb. nov., along with some habitat notes are given. The presumed zoogeographical links of this endemic species with the central Chilean opiliofauna are briefly discussed. 

Laxotela - a new genus of Therevidae (Diptera) from Australia

1999 ◽  
Vol 30 (3) ◽  
pp. 299-310 ◽  
Author(s):  
Michael E. Irwin ◽  
Shaun L. Winterton
Keyword(s):  
New Species ◽  
Phylogenetic Relationships ◽  
New Genus ◽  
Cladistic Analysis ◽  
Sister Group ◽  
Sister Group Relationship ◽  
Relationship Of

AbstractLaxotela gen. n. is described and figured from Australia, with five new species: L. gaimarii sp. n., L. hauseri sp. n., L. holstoni sp. n., L. metzi sp. n. and L. whitei sp. n. We conducted a cladistic analysis of all species of Laxotela gen. n. and Belonalys occulta (White). The phylogenetic relationships of Laxotela gen. n. and the sister group relationship of Laxotela gen. n. to Belonalys are discussed.

A new genus of ionoscopiform fish (Halecomorphi) from the Lower Cretaceous (Albian) lithographic limestones of the Tlayúa Quarry, Puebla, Mexico

2008 ◽  
Vol 82 (1) ◽  
pp. 163-175 ◽  
Author(s):  
Jesús Alvarado-Ortega ◽  
Luis Espinosa-Arrubarrena
Keyword(s):  
Lower Cretaceous ◽  
New Genus ◽  
Cladistic Analysis ◽  
Ventral Surface ◽  
New Taxon ◽  
Diagnostic Characters ◽  
Dorsal Fin ◽  
Fin Rays

Quetzalichthys perrilliatae n. gen. and sp. is described based on five specimens from Lower Cretaceous (Middle-Upper Albian) limestones of the Tlayúa Quarry, near Tepexi de Rodríguez, Puebla, Mexico. This new taxon displays the diagnostic characters of Ionoscopiformes, which consequently designate it as a new member of this order of Mesozoic fishes. Additionally, Quetzalichthys n. gen. shares several derived characters with Ionoscopus and Oshunia, including the presence of more than 15 supraneurals, solid and well-ossified monospondylous vertebrae with two lateral longitudinal oval fossae, thin scales of the amioid type, and the ventral surface of some circumorbital bones being intensely pitted. Quetzalichthys perrilliatae is characterized by three unique characters: 26 abdominal centra, 21 principal dorsal fin rays, and two supraorbitals. Additionally, its unpaired fins and tail show conditions intermediate to those found in Ionoscopus and Oshunia. A cladistic analysis of Ionoscopiformes, including both taxa found in the Tlayúa Quarry (Quetzalichthys and Teoichthys), identifies two monophyletic families within the order, Ophiopsidae (including Ophiopsis, Macrepistius, Teoichthys) and Ionoscopidae (involving Ionoscopus, Oshunia, and Quetzalichthys).

scholarly journals The most complete enantiornithine from North America and a phylogenetic analysis of the Avisauridae

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5910 ◽  
Author(s):  
Jessie Atterholt ◽  
J. Howard Hutchison ◽  
Jingmai K. O’Connor
Keyword(s):  
North America ◽  
Late Cretaceous ◽  
New Genus ◽  
Large Body ◽  
Cladistic Analysis ◽  
South American ◽  
New Taxon ◽  
Large Body Size ◽  
First Time ◽  
North And South

The most complete known North American enantiornithine was collected in 1992 but never formally described. The so-called “Kaiparowits avisaurid” remains one of the most exceptional Late Cretaceous enantiornithine fossils. We recognize this specimen as a new taxon, Mirarce eatoni (gen. et sp. nov.), and provide a complete anatomical description. We maintain that the specimen is referable to the Avisauridae, a clade previously only known in North America from isolated tarsometatarsi. Information from this specimen helps to clarify evolutionary trends within the Enantiornithes. Its large body size supports previously observed trends toward larger body mass in the Late Cretaceous. However, trends toward increased fusion of compound elements across the clade as a whole are weak compared to the Ornithuromorpha. The new specimen reveals for the first time the presence of remige papillae in the enantiornithines, indicating this feature was evolved in parallel to dromaeosaurids and derived ornithuromorphs. Although morphology of the pygostyle and (to a lesser degree) the coracoid and manus appear to remain fairly static during the 65 million years plus of enantiornithine evolution, by the end of the Mesozoic at least some enantiornithine birds had evolved several features convergent with the Neornithes including a deeply keeled sternum, a narrow furcula with a short hypocleidium, and ulnar quill knobs—all features that indicate refinement of the flight apparatus and increased aerial abilities. We conduct the first cladistic analysis to include all purported avisuarid enantiornithines, recovering an Avisauridae consisting of a dichotomy between North and South American taxa. Based on morphological observations and supported by cladistic analysis, we demonstrate Avisaurus to be paraphyletic and erect a new genus for “A. gloriae,” Gettyia gen. nov.

A new genus of Sabellidae (Annelida, Polychaeta) from Antarctica, with discussion of relationships among plesiomorphic genera within Sabellinae

Zootaxa ◽  
2009 ◽  
Vol 2226 (1) ◽  
pp. 28-42 ◽  
Author(s):  
MARGHERITA LICCIANO ◽  
ADRIANA GIANGRANDE ◽  
MARIA CRISTINA GAMBI
Keyword(s):  
New Species ◽  
New Genus ◽  
Cladistic Analysis ◽  
Cylindrical Shape ◽  
New Taxon ◽  
Consensus Tree ◽  
Data Set ◽  
Modal Class ◽  
Soft Bottoms ◽  
The Antarctic

A new genus of Sabellidae (Annelida, Polychaeta), collected in the soft bottoms off the Antarctic Peninsula (Antarctica) in January 2006 is described. The new genus Euchoneira is included in the most plesiomorphic area in the sub-family Sabellinae. Similar to the genus Euchone, this new taxon presents a well developed anal depression with lateral wings, but the shape of abdominal uncini resembles that of Jasmineira. The new species Euchoneira knoxi gen. sp. nov., very abundant in the investigated area, is a gonochoric form (sex-ratio close 1:1). Females contained eggs ranging from 100 to 250 µm in diameter (modal class 175 µm) either in the abdomen or thorax. Males with mature sperm had spermatozoa with a characteristic cylindrical shape of the nucleus with a pointed, “nip-like” acrosome, a morphology similar to that already observed in Euchone pallida Ehlers, 1908, a second species collected together with the new taxon and already known for the Antarctic area. Additions to the description of E. pallida concerning internal structure of the crown, is also given. To define the relationships between the newly described genus and the genera present in the plesiomorphic area of the Sabellinae subfamily, a cladistic analysis was performed utilizing a previous data set after adding the new taxon. The consensus tree confirmed Amphicorina armandi (Claparéde, 1868) as the most plesiomorphic taxon separated from all the others. The new genus is located in an intermediate position between Jasmineira - Claviramus and the clade containing Chone and Euchone species, close to Fabrisabella vasculosa.

A new hyladelphine marsupial (Didelphimorphia, Didelphidae) from cave deposits of northern Brazil

Zootaxa ◽  
2011 ◽  
Vol 3041 (1) ◽  
pp. 51 ◽  
Author(s):  
ÉDISON VICENTE OLIVEIRA ◽  
PATRICIA VILLA NOVA ◽  
FRANCISCO J. GOIN ◽  
LEONARDO DOS SANTOS AVILLA
Keyword(s):  
New Genus ◽  
Feeding Habits ◽  
Mixing Time ◽  
Time Averaging ◽  
New Taxon ◽  
New Genus And Species ◽  
Data Set ◽  
Cave Deposits ◽  
Northern Brazil ◽  
Molar Morphology

Based on very small upper and lower molars recovered from the Quaternary limestone caves in the State of Tocantins, northern Brazil, we describe a new genus and species of a didelphimorphian marsupial. A phylogenetic analysis based on morphological + karyotypic data set recovered the new genus and species as the sister taxon to the living didelphid, Hyladelphys kalinowskii Voss, Lunde & Simons. The new taxon differs from the latter in having a slightly larger size, more inflated and blunt cusps, greater reduction in number and size of the stylar cusps, in the absence of an anterior cingulum, a deeper ectoflexus in M2, paracone and metacone subequal in M2, and narrower and eccentric protocones. The new marsupial probably weighed no more than 40 g and its molar morphology is suggestive of mixed, insectivorous-frugivorous feeding habits. Although we regard the fauna of Gruta dos Mouras cave as Pleistocene, we do not negate the possibility that a temporal mixing (“time-averaging”) of Pleistocene and Holocene specimens existed and that the newly described taxon is a living marsupial in the study area.

A new pycnodontiform fish from the Early Cretaceous of Las Hoyas (Cuenca, Spain)

2000 ◽  
Vol 171 (2) ◽  
pp. 251-258 ◽  
Author(s):  
Francisco Jose Poyato-Ariza ◽  
Sylvie Wenz
Keyword(s):  
Early Cretaceous ◽  
Standard Length ◽  
New Genus ◽  
Body Height ◽  
Cladistic Analysis ◽  
The Body ◽  
New Taxon ◽  
Unique Combination ◽  
New Genus And Species ◽  
Maximum Body

Abstract Stenamara mia is a new genus and species of a rare pycnodontiform fish from the Barremian, early Cretaceous, lacustrine beds of Las Hoyas, province of Cuenca, Spain. It was previously considered Eomesodon sp., but a number of characters clearly separates it from the genus Eomesodon: lack of prognathism; absence of nuchal plates; presence of a parietal process and of only two rows of teeth in the prearticular; and peltate pattern of ossification and distribution of scales, that is, scales are present only before the level of the unpaired fins, and are complete only in the ventralmost abdominal area. The unique combination of these and other characters, plus the following autopomorphies, diagnoses the new taxon: presence of a strongly curved dorsal prominence that results in an ovoid shape of the contour of the body; body deeper than long, with maximum body height near 125% of standard length; and narrow, high cloaca formed by only two differentiated scales, the posterior one considerably longer than the anterior one. Stenamara mia nov. gen. nov. sp. is considered a primitive Pycnodontidae, pending a cladistic analysis to determine precisely its phylogenetic relationships.

Aops oncodactylus, gen. et sp. nov., the first troglobitic urodacid (Urodacidae:Scorpiones), with a re-assessment of cavernicolous, troglobitic and troglomorphic scorpions

2008 ◽  
Vol 22 (2) ◽  
pp. 235 ◽  
Author(s):  
Erich S. Volschenk ◽  
Lorenzo Prendini
Keyword(s):  
Western Australia ◽  
New Genus ◽  
Cladistic Analysis ◽  
Western Coast ◽  
New Taxon ◽  
New Genus And Species ◽  
The North ◽  
Definition Of ◽  
North Western

We describe a new genus and species of troglomorphic scorpion from Ledge Cave, Barrow Island, off the north-western coast of Western Australia. This troglobite scorpion was initially difficult to place within the superfamily Scorpionoidea Latreille on account of its unusual morphology. Based on cladistic analysis, we demonstrate that this scorpion is phylogenetically most closely related to the endemic Australian genus Urodacus Peters (Urodacidae Pocock). The new taxon, named Aops oncodactylus, gen. et sp. nov., is the first troglobitic urodacid and the first troglobitic scorpion recorded from continental Australia. In light of this discovery, we re-assess the known diversity of troglobitic scorpions and the troglomorphic adaptations (troglomorphies) of cavernicolous scorpions. A distinction is recognised between the exclusive occurrence in cavernicolous habitats and the presence of troglomorphies, which are exhibited by some endogean (humicolous) scorpions. The definition of troglobitic scorpions is limited to species that are both restricted to cavernicolous habitats and exhibit pronounced troglomorphies. Only 20 scorpion species meet both criteria and are considered unequivocally troglobitic according to this definition.

A ten-faced hexangulaconulariid from Cambrian Stage 2 of South China

2021 ◽  
pp. 1-8
Author(s):  
Junfeng Guo ◽  
Jian Han ◽  
Heyo Van Iten ◽  
Zuchen Song ◽  
Yaqin Qiang ◽  
...  
Keyword(s):  
New Genus ◽  
Radial Symmetry ◽  
New Taxon ◽  
Three Gorges ◽  
Substantial Variation ◽  
The Three Gorges ◽  
Apical Half ◽  
Lateral Margins ◽  
Number Of Faces ◽  
Extinct Group

Abstract Hexangulaconulariids (Cambrian stages 1–2) are an extinct group of medusozoan polyps having a biradially symmetrical, fan-shaped periderm that is distinct from those of medusozoan polyps showing three-, four-, five-, or six-fold radial symmetry. Hexangulaconulariids exhibit substantial variation in gross morphology, including variation in the number of faces on each of the two major sides of the periderm. An intermediate taxon of hexangulaconulariids with ten faces (five on each major side) was expected. Here we describe a new hexangulaconulariid, Decimoconularia isofacialis new genus new species from Bed 5 of the Yanjiahe Formation (Cambrian Stage 2) in the Three Gorges area of Hubei Province, China. The new taxon differs from other hexangulaconulariids (Arthrochites, Hexaconularia, and Septuconularia) mainly in possessing a total of ten faces. The two lateral margins are each marked by a ridge in about the apertural half of the periderm and by a collinear furrow in about the apical half, while the five faces on each major side are bounded by a furrow in about the apertural half and by a collinear ridge in about the apical half. Among hexangulaconulariids, Decimoconularia and Septuconularia may be more closely related to each other than either genus is to Arthrochites or Hexaconularia. UUID: http://zoobank.org/ca270a3b-25ee-4d1f-bdeb-91a963370e70

Sakakibarana, a new genus of Gyponini (Hemiptera: Cicadellidae: Iassinae) from the Amazon Rainforest

Zootaxa ◽  
2017 ◽  
Vol 4281 (1) ◽  
pp. 219 ◽  
Author(s):  
CLAYTON CORRÊA GONÇALVES ◽  
DANIELA MAEDA TAKIYA ◽  
GABRIEL MEJDALANI
Keyword(s):  
Type Species ◽  
French Guiana ◽  
New Genus ◽  
Morphological Features ◽  
Amazon Rainforest ◽  
Related Genus ◽  
Caudal Process ◽  
Northern Brazil

A new genus of Gyponini, Sakakibarana gen. nov., is proposed and its type species S. amazonica sp. nov. is described and illustrated based on specimens from the Amazon Rainforest of Northern Brazil (states of Amazonas and Pará) and French Guiana. The new genus can be distinguished from other members of the Gyponini by the following morphological features: robust body, short crown, crown and face transition distinct and subfoliaceous, pronotum strongly declivous, male pygofer with caudal process, and aedeagus with dorsal apodemes with a pair of processes. A discussion comparing the new genus with the related genus Tenuacia DeLong, 1977 is provided. 

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