Molecular phylogeny of the limacoid snail family Dyakiidae in Southeast Asia, with the description of a new genus and species

2020 ◽  
Author(s):  
Parin Jirapatrasilp ◽  
Piyoros Tongkerd ◽  
Ekgachai Jeratthitikul ◽  
Thor-Seng Liew ◽  
Arthit Pholyotha ◽  
...  
Keyword(s):  
Molecular Phylogeny ◽  
Southeast Asia ◽  
New Genus ◽  
Cladistic Analysis ◽  
Morphological Characters ◽  
The Other ◽  
New Genus And Species ◽  
Snail Family ◽  
Geographical Distribution Pattern ◽  
Transformation Series

Abstract Members of the terrestrial snail family Dyakiidae from Southeast Asia show a distinct geographical distribution pattern and possess different degrees of complexity in their amatorial organ gland. This study is the first molecular phylogeny of ten of the 12 genera in this family, performed to provide insights into the origin of Dyakiidae and the evolution of their shells and amatorial organ gland structure. A new genus and new species, Pseudoquantula lenticularis Jirapatrasilp & Panha gen. & sp. nov., was uncovered based on its distinct morphological characters and molecular divergence. All other genera were retrieved as monophyletic except for Dyakia. Mainland Southeast Asia was inferred to be the ancestral range of the Dyakiidae, and the lineages then dispersed to and diversified in Borneo. Cladistic analysis showed that all 14 morphological characters used in this study were homoplastic. These results disagree with the previous amatorial organ transformation series, in which neither Pseudoplecta nor Quantula was ancestral to the other genera. The enigmatic genus Pseudoplecta, which lacks an amatorial organ gland, exhibited secondary loss.

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.

Zunielmis pax, a new genus and species of riffle beetles (Coleoptera: ­Elmidae) from Colombia

2021 ◽  
Vol 30 (2) ◽  
pp. 248-265
Author(s):  
M. González-Córdoba ◽  
V. Manzo ◽  
C.E. Granados-Martínez
Keyword(s):  
New Species ◽  
River Basin ◽  
New Genus ◽  
Morphological Characters ◽  
The Other ◽  
Female Genitalia ◽  
Lateral Margin ◽  
New Genus And Species ◽  
Freshwater Sponges ◽  
Male And Female

A new riffle beetle, Zunielmis pax gen. et sp. nov., is described from Colombia (Vichada, Puerto Carreño, Bita River basin). It can be distinguished from all the other elmids by having large areas of a microgranular mesh (plastron) on the pronotum and elytra, crenulate lateral margin of the latter two, the shorter interocular distance than diameter of each eye, as well as by the characters of the structure of mandibles, the shape and sculpture of pronotum, and the structure of mesosternum, mesotibiae and elytra. The imagoes were collected on freshwater sponges. The habitat, where the new species was found, is described, and the adaptive meaning of the characteristics of plastron are discussed. Drawings and photographs of the adult habitus, distinctive morphological characters, and male and female genitalia are provided.

Morphological phylogeny of the family Actinostolidae (Anthozoa:Actiniaria) with description of a new genus and species of hydrothermal vent sea anemone redefining the family Actinoscyphiidae

2008 ◽  
Vol 22 (4) ◽  
pp. 439 ◽  
Author(s):  
Estefanía Rodríguez ◽  
Christopher N. Castorani ◽  
Marymegan Daly
Keyword(s):  
North Pacific ◽  
Hydrothermal Vent ◽  
New Genus ◽  
North Pacific Ocean ◽  
Cladistic Analysis ◽  
Morphological Characters ◽  
Sea Anemone ◽  
Morphological Evidence ◽  
New Genus And Species ◽  
The Family

We describe a new genus and species of hydrothermal vent sea anemone from the eastern north Pacific Ocean. The combination of characters in Alvinactis reu, gen. et sp. nov. is unique among currently known genera of the actiniarian superfamily Mesomyaria; most notable among its external features is a belt of verrucae and cinclides in the distal column. We assess the placement of Alvinactis, gen. nov. and evaluate taxonomic features used to distinguish groups within Actinostolidae Carlgren, 1893 and Actinoscyphiidae Stephenson, 1920 with a cladistic analysis of morphological characters. Phylogenetic analysis reveals that Alvinactis, gen. nov. and several genera previously ascribed to Actinostolidae belong in Actinoscyphiidae. Morphological evidence fails to support monophyly of Actinostolidae, but does support monophyly of the previously proposed subfamily Actinostolinae.

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.

Saotomia tuberculata, a new genus and species of Peritelini (Coleoptera; Curculionidae; Entiminae) from São Tomé, West Africa

Zootaxa ◽  
2021 ◽  
Vol 4966 (5) ◽  
pp. 571-577
Author(s):  
ROMAN BOROVEC ◽  
ROBERT ANDERSON
Keyword(s):  
West Africa ◽  
New Genus ◽  
The Other ◽  
New Genus And Species

Saotomia tuberculata, a new genus and species of Peritelini (Curculionidae; Entiminae) from São Tomé, West Africa is described. The new genus is most similar to the other African genera Dysommatus Marshal, 1933 and Fernandius Marshall, 1954. Important taxonomic characters are illustrated. 

A new genus and species of Sclerodactylidae (Echinodermata: Holothuroidea: Sclerothyoninae) from the Pacific coast of Panama, and assignment of Neopentamera anexigua to Sclerothyoninae

Zootaxa ◽  
2018 ◽  
Vol 4429 (1) ◽  
pp. 157
Author(s):  
LUCIANA MARTINS ◽  
MARCOS TAVARES
Keyword(s):  
Body Wall ◽  
New Genus ◽  
Pacific Coast ◽  
The Body ◽  
The Other ◽  
Monotypic Genus ◽  
New Genus And Species ◽  
The Pacific ◽  
Calcareous Ring

Paulayellus gustavi, a new sclerodactylid genus and species, is described from the Pacific coast of Panama. The new genus and species is assigned to the subfamily Sclerothyoninae based on a suite of characters, which include the radial and interradial plates of the calcareous ring united at the base only. Paulayellus gen. nov. differs from the other Sclerothyoninae genera in having posterior processesof radial plates undivided. Additionally, differs from Sclerothyone, Thandarum and Neopentamera in having knobbed buttons, plates and cups in the body wall (whereas the body wall is furnished only with tables and plates in Sclerothyone, Temparena and Thandarum, and only with knobbed buttons and plates in Neopentamera). The new genus is, so far, monotypic. The also monotypic genus Neopentamera proved to have the radial and the interradial plates of the calcareous ring united at the base only, as typically found in the Sclerothyoninae, and is therefore transferred to that subfamily. The discovery of a new genus in the Sclerothyoninae and the transfer of Neopentamera required the amendation of the diagnosis for the subfamily. A key to the Sclerothyoninae is given. 

scholarly journals Claviplatys henryi, a new genus and species of Plataspidae from southern India (Hemiptera, Heteroptera)

ZooKeys ◽  
2018 ◽  
Vol 796 ◽  
pp. 397-408
Author(s):  
Dávid Rédei ◽  
Zdeněk Jindra
Keyword(s):  
Type Species ◽  
New Genus ◽  
Morphological Characters ◽  
Southern India ◽  
New Genus And Species ◽  
Systematic Relationships

Claviplatysgen. n. and its type species C.henryisp. n. (Hemiptera: Heteroptera: Plataspidae: Plataspinae) are described from Kerala, India. The new genus is related to the Indomalayan genera Heterocrates Amyot & Serville, 1843, Cratoplatys Montandon, 1894, and Cronion Bergroth, 1891, but differs from them and all other plataspid genera by the peculiarly modified antenna. The morphological characters and systematic relationships of the above genera are discussed.

Gymnesigobius medits (Teleostei: Gobiidae), a new gobiid genus and species from the western Mediterranean slope bottoms

Zootaxa ◽  
2019 ◽  
Vol 4651 (3) ◽  
pp. 513-530
Author(s):  
MARCELO KOVAČIĆ ◽  
FRANCESC ORDINES ◽  
SERGIO RAMIREZ-AMARO ◽  
ULRICH K. SCHLIEWEN
Keyword(s):  
New Genus ◽  
Morphological Characters ◽  
Western Mediterranean ◽  
Full Description ◽  
Unique Combination ◽  
New Genus And Species ◽  
Posterior Edge ◽  
Superior Part ◽  
Dorsal Fin ◽  
Pelvic Fin

A new genus and species of goby, Gymnesigobius medits sp. nov., is described from the western Mediterranean slope bottoms at the Balearic Islands. The new goby belongs to the Gobius-lineage (Gobiinae). Examination of the single known specimen exhibits a unique combination of morphological characters which could not be fitted to any known genus. Gymnesigobius gen. nov. is morphologically distinguished from all other genera in the Gobius-lineage by the following combination of characters: chin without fold or barbels; mouth terminal with anterior tip above horizontal level of lower eye edge; predorsal area and first dorsal fin base naked; pelvic fin anterior membrane well developed; head with anterior oculoscapular and preopercular canals, posterior oculoscapular canal absent; pores of head canals enlarged, e.g. pores α and ρ larger or of about the same size as interspaces to pore β; six transverse suborbital rows of sensory papillae, four continuous suborbital rows in front of row b, fifth row divided in three parts but in front of row b, sixth row just as superior part above row b and below pore α; longitudinal suborbital row b barely reaching forward to the vertical from posterior edge of eye. A full description of the new genus and species is provided. The new species, collected at a depth of between 344 and 364 m (mean depth of 354 m), is one of very few gobiid species found at bathyal depths. 

scholarly journals Burmese amber reveals a new stem lineage of whirligig beetle (Coleoptera: Gyrinidae) based on the larval stage

2020 ◽  
Vol 189 (4) ◽  
pp. 1232-1248
Author(s):  
Grey T Gustafson ◽  
Mariano C Michat ◽  
Michael Balke
Keyword(s):  
Larval Stage ◽  
New Genus ◽  
Morphological Characters ◽  
New Taxon ◽  
New Genus And Species ◽  
Burmese Amber ◽  
Extinction Event ◽  
Stem Lineage ◽  
Key Features ◽  
Mass Extinction Event

Abstract Burmese amber is well known for preserving unique extinct lineages of insects. Here, we describe a new fossil beetle in its larval stage from Burmese amber. Bayesian and parsimony phylogenetic analysis of 50 morphological characters support this fossil as being sister to both the tribes Dineutini and Orectochilini, representing an extinct stem lineage in Gyrininae. It is described here as a new genus and species of whirligig beetle, Chimerogyrus gigagalea gen. & sp. nov., a taxon that preserves remarkable intermediate features between the whirligig beetle tribe Gyrinini and the crown Orectochilini and Dineutini. This new taxon preserves key features for studying the evolution of characters within the larval stage of the Gyrinidae and highlights the importance of Burmese amber for preserving both stem and crown lineages present during the mid-Cretaceous, before the end-Cretaceous mass extinction event.

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