scholarly journals Three new species of Creptotrema (Trematoda, Allocreadiidae) with an amended diagnosis of the genus and reassignment of Auriculostoma (Allocreadiidae), based on morphological and molecular evidence

Parasite ◽  
2021 ◽  
Vol 28 ◽  
pp. 69
Author(s):  
Lidiane Franceschini ◽  
Aline Aguiar ◽  
Aline Cristina Zago ◽  
Priscilla de Oliveira Fadel Yamada ◽  
Mariana Bertholdi Ebert ◽  
...  

Diversity of Creptotrema was investigated using morphological and molecular tools, including data for Creptotrema creptotrema (type-species). Three new species, parasites of Brazilian fishes, are described: Creptotrema conconae n. sp. (type-host, Imparfinis mirini Haseman), Creptotrema schubarti n. sp. (type-host, Characidium schubarti Travassos) and Creptotrema megacetabularis n. sp. (type-host, Auchenipterus osteomystax (Miranda Ribeiro)). The diagnosis of the genus was amended to include new features. The new species differ from each other mainly in terms of body shape, relative sucker size, and testes position. DNA sequences were obtained from Creptotrema spp. from Brazil, including 28S, ITS and COI. Genetic divergences among the new species and C. creptotrema varied from 2.1 to 5.2% (21–49 bp) for 28S, and 6.6 to 16.4% (21–45 bp) for COI. Phylogenetic analysis (28S) placed the newly generated DNA sequences of Creptotrema in a clade (Creptotrema clade sensu stricto) composed of C. creptotrema, the new species described herein, and all species previously described as Auriculostoma, revealing that Auriculostoma is best interpreted as a synonym of Creptotrema based on the principle of priority of zoological nomenclature. Creptotrema funduli, the single sequence of the genus previously available, was not grouped within the Creptotrema clade sensu stricto, suggesting the need for reevaluation of the taxonomic status of this species. Our results showed that Creptotrema represents a monophyletic genus of trematodes widely distributed across the Americas, which currently comprises 19 valid species of parasites of teleosts and anurans.

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9259 ◽  
Author(s):  
Pablo Teta ◽  
Guillermo D’Elía

Ctenomys Blainville 1826 is one of the most diverse genera of South American caviomorph rodents. Currently, six species of this genus are reported from Patagonia, south of 42°S. In this contribution, we assessed the taxonomic status of several populations from eastern and central Chubut province, northern Patagonia. Based on phylogenetic analyses of DNA sequences, morphology assessment (qualitative and quantitative), and previously published karyological data, we describe three new species of this genus, one formed by two subspecies, endemic to northern Patagonia. In addition, we include C. coyhaiquensis Kelt and Gallardo 1994 into the synonymy of C. sericeus J.A. Allen 1903. Finally, we discussed the need for additional integrative approaches, including field collection of specimens, to better understand the diversity of this highly speciose rodent genus.


2004 ◽  
Vol 82 (7) ◽  
pp. 914-926 ◽  
Author(s):  
Keith A Seifert ◽  
Nancy L Nickerson ◽  
Michael Corlett ◽  
Eric D Jackson ◽  
Gerry Louis-Seize ◽  
...  

Three new species of heat-resistant fungi related to the hyphomycete Cladosporium staurophorum (Kendrick) M.B. Ellis were isolated from heat-treated soil from commercial lowbush blueberry fields and other sites in eastern Canada. Cladosporium staurophorum and the three new species produce characteristic dark, multicelled chlamy dospores. Phylogenetic analysis of nuclear ribosomal internal transcribed spacer DNA sequences suggest that these four species form a monophyletic group that is marginal in the Mycosphaerellaceae and phylogenetically distinct from Cladosporium sensu stricto. The new genus Devriesia is described for C. staurophorum, the three new species, and a fifth species originally described as Cladosporium chlamydosporis. A key to distinguish the five accepted species is provided. The species of the genus are dimorphic and share similar cladosporium-like conidial anamorphs consisting of pale brown, short, acropetally produced chains of cylindrical to fusiform, zero- or one-septate conidia and ramoconidia, diagnostic chlamydosporic synanamorphs, and a soil-borne, heat-resistant ecology. Devriesia acadiensis N.L. Nickerson & Seifert, with clover-shaped chlamydospores, Devriesia shelburniensis N.L. Nickerson & Seifert, with large, multi celled chlamydospores, and Devriesia thermodurans N.L. Nickerson & Seifert, with few-celled, clavate chlamy dospores, are described as new species. Chlamydospores from cultures of D. acadiensis, Devriesia staurophora, and D. thermodurans germinated after exposure to 75 °C for 30 min. Germination of these spores was activated by a heat shock. Chlamydospores from cultures of C. shelburniensis did not germinate after heat exposure.Key words: dematiaceous hyphomycetes, heat-resistant fungi, lowbush blueberries, Vaccinium angustifolium, ITS rDNA phylogeny.


PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2694 ◽  
Author(s):  
Gabriela Parra-Olea ◽  
Sean M. Rovito ◽  
Mario García-París ◽  
Jessica A. Maisano ◽  
David B. Wake ◽  
...  

We describe three new species of minute salamanders, genusThorius, from the Sierra Madre del Sur of Oaxaca, Mexico. Until now only a single species,T. minutissimus, has been reported from this region, although molecular data have long shown extensive genetic differentiation among geographically disjunct populations. AdultThorius pinicolasp. nov.,T. longicaudussp. nov., andT. tlaxiacussp. nov. are larger thanT. minutissimusand possess elliptical rather than oval nostrils;T. pinicolaandT. longicaudusalso have longer tails. All three new species occur west of the range ofT. minutissimus, which has the easternmost distribution of any member of the genus. The new species are distinguished from each other and from other namedThoriusin Oaxaca by a combination of adult body size, external morphology and osteology, and by protein characters (allozymes) and differences in DNA sequences. In addition, we redescribeT. minutissimusand a related species,T. narisovalis, to further clarify the taxonomic status of Oaxacan populations and to facilitate future studies of the remaining genetically differentiatedThoriusthat cannot be satisfactorily assigned to any named species. Populations of all five species considered here appear to have declined dramatically over the last one or two decades and live specimens are difficult to find in nature.Thoriusmay be the most endangered genus of amphibians in the world. All species may go extinct before the end of this century.


Zootaxa ◽  
2009 ◽  
Vol 2137 (1) ◽  
pp. 1-22 ◽  
Author(s):  
MEIYING LIN ◽  
OLIVIER MONTREUIL ◽  
GÉRARD TAVAKILIAN ◽  
XINGKE YANG

Heteroglenea Gahan, 1897 is reinstated from the synonyms of Glenea (sensu stricto) Newman, 1842, and is redefined. Four taxa are transferred to Heteroglenea: H. fissilis (Breuning, 1953) comb. nov., H. bastiensis (Breuning, 1956) comb. nov., H. momeitensis (Breuning, 1956) comb. nov. and H. mediodiscoprolongata (Breuning, 1964) comb. nov. Glenea mimoluctuosa Breuning, 1968 is considered a junior synonym of H. mediodiscoprolongata (Breuning, 1964). Glenea (G.) palawana Breuning, 1956, G. (G.) guadalcanalana Breuning, 1958, and G. (G.) hamabovola Hayashi, 1975, are considered junior synonyms of H. glechoma (Pascoe, 1867). Heteroglenea vicinalis Lin et Yang sp. nov. from Nepal and India, H. gemella Lin et Yang sp. nov. from Nepal and H. dolosa Lin et Yang sp. nov. from Laos are described. Heteroglenea fissilis and H. mediodiscoprolongata are newly recorded from China. Photographs of habitus and terminalia and a key to the nine valid species of Heteroglenea are presented.


1991 ◽  
Vol 123 (3) ◽  
pp. 501-558 ◽  
Author(s):  
Ian M. Smith

AbstractMorphological, life history, and distributional data are presented for North American species of the subgenus Stygomomonia (sensu stricto) Szalay, 1943. Adults of the seven previously recognized species are redescribed, and deutonymphs of five of these species are described for the first time. Two species, S. (s.s.) neomexicana Cook and S. (s.s.) occidentalis Cook are substantially revised on the basis of an examination of the types and extensive series of newly collected specimens. Three new species are described, S. (s.s.) californiensis on the basis of deutonymphs and adults, and S. (s.s.) imamurai and S. (s.s.) cooki on the basis of adults. A new diagnosis of the subgenus is proposed and discussed, the relationships of the various species are discussed, and a key to deutonymphs and adults of North American species is presented. New distributional data are presented for all species, and dispersal patterns from Pleistocene refugia are discussed.


Phytotaxa ◽  
2018 ◽  
Vol 373 (2) ◽  
pp. 99
Author(s):  
PASCAL DESCOURVIÈRES ◽  
JOÃO N. M. FARMINHÃO ◽  
VINCENT DROISSART ◽  
JEAN-YVES DUBUISSON ◽  
MURIELLE SIMO-DROISSART ◽  
...  

A recent large phylogenetic tree for the angraecoid orchids has shown that the Afrotropical genus Diaphananthe is polyphyletic with a small group of four species sister to Aerangis and Eurychone. These species have diagnostic morphological features different from any other angraecoids, notably an erose to fringed surface of the stipes and a calceiform viscidium. Diaphananthe quintasii, which has been regarded as conspecific with D. rohrii, is reinstated as a valid species and lectotypified, and Diaphananthe alfredii and Rhipidoglossum magnicalcar are put in synonymy under D. quintasii. To accommodate this group of species, along with three new taxa from West and Central Africa, a new genus named Kylicanthe is here described. Four new combinations are thus proposed, and K. bueae is chosen as the type species of the new genus and neotypified. Additionally, K. arcuata, K. cornuata, and K. perezverae are described as new species. An identification key for Kylicanthe and allied genera is presented, as well as one for the seven species in the genus. Notes on ecology and distribution in addition to a preliminary assessment of conservation status following the IUCN Red List are also provided.


2011 ◽  
Vol 9 (4) ◽  
pp. 709-730 ◽  
Author(s):  
Alejandro Londoño-Burbano ◽  
César Román-Valencia ◽  
Donald C. Taphorn

We review species of Parodon Valenciennes, 1850 from the Magdalena, Cauca, Orinoco, Amazonas, Atrato and Caribbean-Guajira River basins of Colombia using meristic and morphological characters. We recognize eight valid species, five previously described: P. apolinari Myers, from the Orinoco River basin; P. buckleyi Boulenger and P. pongoensis (Allen) from the upper Amazon; P. caliensis Boulenger, from the upper Cauca River drainage; and P. suborbitalis Valenciennes, from Lake Maracaibo basin. Three new species are described: P. alfonsoi, from the lower Magdalena River drainage; P. magdalenensis, from the middle Magdalena and upper Cauca River drainages; and P. atratoensis, from the Atrato River basin. We redescribe Parodon suborbitalis using type specimens and topotypes, and designate lectotypes. A taxonomic key is included for identification of the species, as well as geographic distribution maps.


2021 ◽  
Vol 19 (2) ◽  
Author(s):  
George Mendes Taliaferro Mattox ◽  
Camila da Silva de Souza ◽  
Mônica Toledo-Piza ◽  
Claudio Oliveira

Abstract A new species of miniature fish of the characid genus Priocharax is described from a small lake near the rio Ipixuna, rio Purus drainage, Amazonas State, Brazil. It is distinguished from all congeners except P. pygmaeus by the lower number of teeth on the maxilla and dentary. It differs from P. pygmaeus by the presence of two postcleithra and 22–27 branched anal-fin rays (vs absence and 19–22). The new species is further distinguished from other species of Priocharax by a combination of characters involving the number of pelvic-fin rays and branched anal-fin rays, the number of postcleithra, the shape of postcleithrum 3, and the absence of the claustrum. Molecular evidence based on COI sequences of all valid species of Priocharax also corroborates the validity of this new species.


ZooKeys ◽  
2019 ◽  
Vol 886 ◽  
pp. 113-126
Author(s):  
Chengcheng Feng ◽  
Yucheng Lin

The current paper expands knowledge of the genus Coddingtonia Miller, Griswold & Yin, 2009. Based on morphological characters and molecular data, three species are documented as new to science: C. erhuan Feng & Lin, sp. nov. (♀) from China, C. lizu Feng & Lin, sp. nov. (♀) from China, and C. huifengi Feng & Lin, sp. nov. (♂♀) from Indonesia. The type of C. euryopoides Miller, Griswold & Yin, 2009 is also reexamined. DNA sequences (COI), detailed illustrations of habitus, male palp and epigyne are provided for these four species, as well as a key and a distribution map for Coddingtonia species.


1994 ◽  
Vol 68 (6) ◽  
pp. 1384-1395 ◽  
Author(s):  
James A. Kralick

Conodont faunas with species of Ancyrodella are described from the upper Penn Yan Shale (Crosby Sandstone) and Genundewa Limestone of the middle Genesee Formation between Keuka Lake and Lake Erie. Three established species and three new species in the early phylogeny of Ancyrodella are discussed: A. rotundiloba (Bryant) early form, A. rotundiloba late form, A. crosbiensis n. sp., A. recta n. sp., A. triangulata n. sp., A. rugosa Branson and Mehl, and A. alata? Glenister and Klapper. Standardization of the taxonomic concepts pertaining to these species (and others in the genus) is necessary to ensure their continued biostratigraphic usefulness. The sequence of faunas in New York correlates well with the lower Frasnian sequence and numbered conodont zones described by Klapper (1985, 1989) in the Montagne Noire, France. A fauna with the late form of Ancyrodella rotundiloba and A. crosbiensis n. sp. in the Crosby Sandstone of the upper Penn Yan Shale correlates with Zone 2 of Klapper (1989). The Crosby fauna succeeds a Zone 1 fauna with the early form of Ancyrodella rotundiloba in the lower Penn Yan Shale. The Crosby fauna is succeeded in turn by a fauna in the upper Genundewa Limestone with A. recta n. sp., A. triangulata n. sp., A. rugosa, and A. alata?, which is correlated with Zone 3 even though the zonal markers, A. alata sensu stricto and typical forms of A. rugosa, first occur in the lower part of the overlying West River Shale.


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