scholarly journals Advanced Cambrian hydroid fossils (Cnidaria: Hydrozoa) extend the medusozoan evolutionary history

2021 ◽  
Vol 288 (1944) ◽  
pp. 20202939
Author(s):  
Xikun Song ◽  
Bernhard Ruthensteiner ◽  
Mingxin Lyu ◽  
Xi Liu ◽  
Jian Wang ◽  
...  
Keyword(s):  
Life Histories ◽  
Morphological Traits ◽  
Evolutionary History ◽  
New Genus ◽  
Northern China ◽  
Systematic Position ◽  
Life Strategy ◽  
Late Neoproterozoic ◽  
Evolutionary Aspects ◽  
Medusa Stage

Primitive cnidarians are crucial for elucidating the early evolution of metazoan body plans and life histories in the late Neoproterozoic and Palaeozoic. The highest complexity of both evolutionary aspects within cnidarians is found in extant hydrozoans. Many colonial hydrozoans coated with chitinous exoskeletons have the potential to form fossils; however, only a few fossils possibly representing hydroids have been reported, which still require scrutiny. Here, we present an exceptionally well-preserved hydroid found in the Upper Cambrian Fengshan Formation in northern China. It was originally interpreted as a problematic graptolite with an uncertain systematic position. Based on three characteristic morphological traits shared with extant hydroids (with paired hydrothecae, regular hydrocaulus internodes and special intrathecal origin pattern of hydrocladium), we propose this fossil hydroid as a new genus, Palaeodiphasia gen. nov., affiliated with the advanced monophyletic hydrozoan clade Macrocolonia typically showing loss of the medusa stage. More Macrocolonia fossils reviewed here indicate that this life strategy of medusa loss has been achieved already as early as the Middle Devonian. The early stratigraphical appearance of such advanced hydroid contrasts with previous molecular hypotheses regarding the timing of medusozoan evolution, and may be indicative for understanding the Ediacaran cnidarian radiation.

Apertochrysa (Neuroptera: Chrysopidae): A heterogeneric phantom? 

Zootaxa ◽  
2017 ◽  
Vol 4238 (1) ◽  
pp. 58 ◽  
Author(s):  
ATSUSHI MOCHIZUKI ◽  
CHARLES S. HENRY ◽  
PETER DUELLI
Keyword(s):  
Type Species ◽  
Morphological Traits ◽  
New Genus ◽  
Sequence Data ◽  
New Combination ◽  
Wing Venation ◽  
Monophyletic Clade ◽  
Molecular Sequence Data ◽  
Molecular Sequence ◽  
Group Relationships

The small lacewing genus Apertochrysa comprises species from Africa, Asia and Australia. All lack a tignum, but otherwise resemble distantly related genera. We show that Apertochrysa does not form a monophyletic clade, based on analyses of molecular sequence data and morphological traits such as the presence and shape of the male gonapsis, wing venation, and larval setae. Apertochrysa kichijoi forms a clade with Eremochrysa, Suarius and Chrysemosa, whereas A. albolineatoides belongs to a clade that includes Cunctochrysa. Apertochrysa albolineatoides should become a new combination as Cunctochrysa albolineatoides, while A. kichijoi will have to be transferred to a new genus. The Australian A. edwardsi, the African A. eurydera and the type species of the genus Apertochrysa, A. umbrosa, join the large Pseudomallada group. Relationships of A. umbrosa are less certain, because for it we could amplify only one of the three nuclear genes used in the overall analysis. However, in all morphological traits tested, that species strongly resembles A. edwardsi and A. eurydera and thus is very likely just another exceptional Pseudomallada lacking a tignum. The fate of the genus name Apertochrysa depends on additional molecular and morphological analyses of A. umbrosa. 

Akamboja gen. nov., a new genus of railroad-worm beetle endemic to the Atlantic Rainforest, with five new species (Coleoptera: Phengodidae, Mastinocerinae)

Zootaxa ◽  
2017 ◽  
Vol 4306 (4) ◽  
pp. 501 ◽  
Author(s):  
ANDRÉ SILVA ROZA ◽  
HINGRID YARA SOUZA QUINTINO ◽  
JOSÉ RICARDO MIRAS MERMUDES ◽  
LUIZ FELIPE LIMA DA SILVEIRA
Keyword(s):  
New Species ◽  
Evolutionary History ◽  
New Genus ◽  
Landscape Heterogeneity ◽  
Atlantic Rainforest ◽  
Disjunct Distribution ◽  
Key To Species ◽  
Diagnostic Features ◽  
Mountain Ranges ◽  
Phylogenetic Studies

The Atlantic Rainforest is a hotspot of biodiversity, housing several endemic species. Environmental stasis through broad time scales, vast latitudinal extension and landscape heterogeneity are thought to contribute in explaining the greater species richness of this biome. Unfortunately, it is threatened mainly due to anthropic-driven habitat loss. Ectotherms of low-mobility, such as tropical, small soft-bodied railroad-worms, may be especially threatened by anthropogenic climate changes. Many of such species have narrow climatic niches and therefore might become extinct before we know them. Here we describe a new genus endemic of the Atlantic Rainforest mountain ranges, and five spatially disjunct new species. Akamboja gen. nov. is unique by its ten-segmented antenna, IV to VIII with two short symmetrical branches, branches of antennomere IX fused in a singular flabellum, slightly depressed medially; elytron short, surpassing the second to fourth abdominal segment (depending on species); first tarsomere of anterior leg with a ventral comb; claws with six long and asymmetrical teeth; aedeagus with patch of bristles at paramere apex. We provide a key to species as well as illustrations for the diagnostic features. We highlight that Akamboja cleidae sp. nov., as defined here, has a disjunct distribution and its populations are surrounded by an unsuitable environmental matrix, thus are probably reproductively isolated. Future phylogenetic studies should address the evolutionary history and delimitation of this taxon. We also provide a key to genera of Mastinocerinae with ten antennomeres, including Akamboja gen. nov. 

Sticholeia - a new genus of Leiini, with comments on the systematic position of Allactoneura de Meijere (Diptera: Mycetophilidae)

1996 ◽  
Vol 27 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Geir E.E. Söli
Keyword(s):  
New Species ◽  
New Genus ◽  
New Guinea ◽  
Systematic Position ◽  
Two New Species

AbstractA new genus, Sticholeia, is erected to comprise two new species, cheesmanae and dolichostyla, from New Guinea and Vanuatu, respectively, and an unnamed female from Indonesia. Members of the new genus have two ocelli, a row of strong bristles near the hind margin of the eyes, tibial trichia arranged in regular rows, and strongly prolonged male terminalia. Despite featuring some characters supposed to be diagnostic for the subfamily Manotinae, the new genus is attributed to the tribe Leiini of Sciophilinae. The genus may represent the sistergroup of Allactoneura de Meijere plus Leiella Enderlein. Judged from the distribution of characters among Leiini the monotypic tribe Allactoneurini is rejected.

scholarly journals Olmiana argentina, a new genus and species of Achilidae (Hemiptera, Fulgoromorpha) from Argentina

Zootaxa ◽  
2010 ◽  
Vol 2661 (1) ◽  
pp. 47 ◽  
Author(s):  
A. GUGLIELMINO ◽  
C. BÜCKLE ◽  
A. F. EMELJANOV
Keyword(s):  
New Genus ◽  
Larval Instar ◽  
First Record ◽  
Systematic Position ◽  
New Genus And Species

The first record of the planthopper tribe Achilini from Argentina is established with the description of Olmiana argentina gen. and sp. nov.. Details of the fifth larval instar are described. The systematic position of the new genus within the Achilidae is discussed, and a key to the genera of the subtribe Achilina is provided.

Revision of world Ceroptresini (Hymenoptera: Cynipidae) with the description of a new genus and five new species

Zootaxa ◽  
2019 ◽  
Vol 4685 (1) ◽  
pp. 1-67 ◽  
Author(s):  
IRENE LOBATO-VILA ◽  
JULI PUJADE-VILLAR
Keyword(s):  
New Species ◽  
Type Species ◽  
Morphological Traits ◽  
New Genus ◽  
Taxonomic Revision ◽  
Valid Species ◽  
Distribution Data ◽  
The Status ◽  
The Usa ◽  
First Time

A taxonomic revision of the tribe Ceroptresini (Hymenoptera: Cynipidae) is conducted for the first time. Prior to this study, the total number of valid species of Ceroptres, the only genus within Ceroptresini to date, was 23. As a result of this revision, 15 Ceroptres species are retained as valid and one species, Amblynotus ensiger Walsh, 1864, is desynonymized from Ceroptres petiolicola (Osten-Sacken, 1861), being considered here as a valid Ceroptres species: C. ensiger (Walsh, 1864) status verified and comb. nov. An additional five new species are described from Mexico: Ceroptres junquerasi Lobato-Vila & Pujade-Villar sp. nov.; C. lenis Lobato-Vila & Pujade-Villar sp. nov.; C. mexicanus Lobato-Vila & Pujade-Villar sp. nov.; C. nigricrus Lobato-Vila & Pujade-Villar sp. nov.; C. quadratifacies Lobato-Vila & Pujade-Villar sp. nov., increasing the total number of valid Ceroptres species to 21. Ceroptres masudai Abe, 1997 is synonymized with C. kovalevi Belizin, 1973. Ceroptres niger Fullaway, 1911 is transferred to Andricus (Andricus confusus Lobato-Vila & Pujade-Villar comb. nov. and nom. nov.). Five species (Amblynotus inermis Walsh, 1864; Cynips quercusarbos Fitch, 1859; Cynips querficus Fitch, 1859; Cynips quercuspisum Fitch, 1859; and Cynips quercustuber Fitch, 1859) are not considered as valid Ceroptres. The status of Ceroptres quereicola (Shinji, 1938), previously classified as an unplaced species, is commented on. In addition, a Nearctic species from the USA, Ceroptres politus Ashmead, 1896, is here proposed as the type species of a new genus within Ceroptresini: Buffingtonella Lobato-Vila & Pujade-Villar gen. nov. Redescriptions, biological and distribution data, illustrations and keys to genera and species within Ceroptresini are provided. The diagnostic morphological traits of Ceroptresini, Ceroptres and the new genus are discussed. 

Masonoceras, a new karagandoceratid ammonoid from the lower Mississippian (lower Osagean) of Kentucky

2002 ◽  
Vol 76 (3) ◽  
pp. 574-577 ◽  
Author(s):  
David M. Work ◽  
Walter L. Manger
Keyword(s):  
New Species ◽  
Type Species ◽  
New Genus ◽  
Systematic Position ◽  
Ventral Lobe ◽  
Formal Description ◽  
Ventral Margin ◽  
Borden Formation ◽  
Conodont Zone ◽  
A New Species

Karagandoceratids are a rare offshoot of the Prionoceratinae, resembling that subfamily in general conch form and sutural ontogeny, but differing by possession of an acute ventral margin and an increasingly trifid ventral lobe. The systematic position of the Karagandoceratidae has been controversial [see Bartzsch and Weyer (1988) for an exhaustive review]. The nominate genus, Karagandoceras Librovitch, 1940 (type species, K. galeatum), possesses a weakly divided ventral lobe which has led authors to refer it to both the Praeglyphioceratina (Ruzhencev, 1960, 1962; Bogoslovsky, 1971; Ruzhencev and Bogoslovskaya, 1978; Bogoslovskaya et al., 1999; Kusina, 2000) and the Goniatitina (Weyer, 1965, 1972; Kullmann, 1981). Discovery of an ancestral karagandoceratid genus, gen. nov. I aff. Karagandoceras Bartzsch and Weyer, 1988, in the early Tournaisian Siphonodella sandbergi conodont Zone in Germany provided clarification on the proximate origin of Karagandoceras and provided a plausible link to the early Tournaisian prionoceratin genus Nicimitoceras Korn, 1993 (type species, Imitoceras subacre Vöhringer, 1960). Bartzsch and Weyer (1988) proposed a karagandoceratid phylogeny beginning with gen. nov. I aff. Karagandoceras in the early Tournaisian, progressing through Karagandoceras in the middle Tournaisian, and culminating with a third, descendent genus, gen. nov. II aff. Karagandoceras (typical species, Karagandoceras bradfordi Manger, 1971), early in the late Tournaisian. Bartzsch and Weyer (1988) elected to leave both the initial and final members of this lineage, gen. nov. I and gen. nov. II aff. Karagandoceras, in open nomenclature pending discovery of more completely preserved material. Discovery of superbly preserved representatives of a new species of gen. nov. II aff. Karagandoceras from the Borden Formation in northeastern Kentucky provides additional sutural and morphological details that support Bartzsch and Weyer's phylogenetic interpretation and makes formal description of this terminal karagandoceratid taxon (herein designated Masonoceras new genus) possible.

scholarly journals Grossicis, a new genus of Neotropical minute tree-fungus beetles (Coleoptera: Ciidae), with a detailed discussion on its systematic position in the family

2012 ◽  
Vol 335 (2) ◽  
pp. 107-119 ◽  
Author(s):  
Caio Antunes-Carvalho ◽  
Vivian Eliana Sandoval-Gómez ◽  
Cristiano Lopes-Andrade
Keyword(s):  
New Genus ◽  
Systematic Position ◽  
The Family

Ophiolechia, a new genus of Neotropical Gelechiidae (Lepidoptera)

1996 ◽  
Vol 27 (2) ◽  
pp. 121-158 ◽  
Author(s):  
Klaus Sattler
Keyword(s):  
New Genus ◽  
Systematic Position ◽  
Female Genitalia ◽  
Male And Female ◽  
General Aspects

AbstractOphiolechia gen. n., a Neotropical genus occurring in Brazil, Ecuador, Paraguay and Argentina, is described and its systematic position is discussed together with some general aspects of gelechiid morphology. Two new generic combinations are introduced, twelve species are newly described and four further species are discussed but not named. Keys to the species are provided, based on the male and female genitalia, and the adults and their genitalia are described and illustrated.

Rautangaroa, a new genus of feather star (Echinodermata, Crinoidea) from the Oligocene of New Zealand

2018 ◽  
Vol 92 (5) ◽  
pp. 872-882 ◽  
Author(s):  
Tomasz K. Baumiller ◽  
R. Ewan Fordyce
Keyword(s):  
New Zealand ◽  
Detailed Analysis ◽  
Evolutionary History ◽  
New Genus ◽  
Intact Specimen ◽  
History Of ◽  
Recovered Material ◽  
Feather Star ◽  
Established Genus

AbstractWe describe a nearly complete, and thus extremely rare, feather star (Crinoidea, Comatulida) from Oligocene strata of North Otago/South Canterbury, New Zealand. A detailed analysis of this specimen, as well as newly recovered material and previously described fragmentary remains from nearby contemporaneous sedimentary units, in addition to relevant historical specimens, lead us to conclude that it cannot be placed in any currently established genus. A new genus,Rautangaroa,is proposed to accommodate it.This intact specimen ofRautangaroa aotearoa(Eagle, 2007), provides rare data on the morphology of arms and cirri. It represents the first example of arm autotomy and regeneration in a fossil feather star and thus has bearing on the importance of predation to the evolutionary history of this group.UUID:http://zoobank.org/c050dafd-93ba-4334-b11b-59209aabb588

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