DESCRIPTION OF DENDRORCHIS RETROBILOBA N. SP. (DIGENEA: GORGODERIDAE) FROM ASTYANAX FASCIATUS (TELEOSTEI: CHARACIDAE) FROM SOUTHERN URUGUAY, WITH AN EMENDED DIAGNOSIS OF THE GENUS DENDRORCHIS

2005 ◽  
Vol 91 (5) ◽  
pp. 1204-1207 ◽  
Author(s):  
Odile Volonterio ◽  
Rodrigo Ponce de León
Keyword(s):  
Astyanax Fasciatus ◽  
Emended Diagnosis

On the morphology and taxonomy of Hannaea arcus (Bacillariophyta)

2008 ◽  
Vol 42 ◽  
pp. 14-22
Author(s):  
S. I. Genkal ◽  
V. G. Kharitonov
Keyword(s):  
Electron Microscopy ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Morphological Features ◽  
New Combination ◽  
Specific Rank ◽  
Ultraoligotrophic Lake ◽  
Emended Diagnosis

This electron microscopy study of the materials from ultraoligotrophic lake Elgygytgyn (Chukotka) revealed variability of morphological features in Hannaea arcus var. arcus and H. arcus var. recta. An emended diagnosis for H. arcus var. arcus is presented, and a new combination in specific rank is published: H. inaequidentata (Lagerstedt) Genkal et Kharitonov (= H. arcus var. recta).

scholarly journals Species of the Devonian aulacopleurid trilobite Cyphaspides from southeastern Morocco

2019 ◽  
Vol 94 (1) ◽  
pp. 99-114
Author(s):  
Brian D.E. Chatterton ◽  
Stacey Gibb ◽  
Ryan C. McKellar
Keyword(s):  
New Species ◽  
Middle Devonian ◽  
Present Contribution ◽  
Three New Species ◽  
Emended Diagnosis

AbstractThree new species of Cyphaspides are proposed: C. ammari, C. nicoleae, and C. pankowskiorum. These species are based on specimens obtained from Middle Devonian (Eifelian) strata of the Bou Tchrafine Group, near Erfoud, in the Province of Errachidia, southeastern Morocco. The present contribution enhances our knowledge of Cyphaspides by providing details of three new species that are based on well-preserved, complete, and articulated types. The genus Cyphaspides is discussed, and an emended diagnosis is provided. The paleobiogeography, ontogeny, and relationships of the genus are discussed.UUID: http://zoobank.org/4a7aab8f-8c8e-4498-9cc2-6f8c69b85213

scholarly journals The Molecular Genetics and Evolution of Red and Green Color Vision in Vertebrates

Genetics ◽  
2001 ◽  
Vol 158 (4) ◽  
pp. 1697-1710 ◽  
Author(s):  
Shozo Yokoyama ◽  
F Bernhard Radlwimmer
Keyword(s):  
Color Vision ◽  
Homo Sapiens ◽  
Amino Acid Sequences ◽  
Capra Hircus ◽  
Sciurus Carolinensis ◽  
Cave Fish ◽  
Vitro Assay ◽  
Green Color ◽  
Astyanax Fasciatus

Abstract To better understand the evolution of red-green color vision in vertebrates, we inferred the amino acid sequences of the ancestral pigments of 11 selected visual pigments: the LWS pigments of cave fish (Astyanax fasciatus), frog (Xenopus laevis), chicken (Gallus gallus), chameleon (Anolis carolinensis), goat (Capra hircus), and human (Homo sapiens); and the MWS pigments of cave fish, gecko (Gekko gekko), mouse (Mus musculus), squirrel (Sciurus carolinensis), and human. We constructed these ancestral pigments by introducing the necessary mutations into contemporary pigments and evaluated their absorption spectra using an in vitro assay. The results show that the common ancestor of vertebrates and most other ancestors had LWS pigments. Multiple regression analyses of ancestral and contemporary MWS and LWS pigments show that single mutations S180A, H197Y, Y277F, T285A, A308S, and double mutations S180A/H197Y shift the λmax of the pigments by −7, −28, −8, −15, −27, and 11 nm, respectively. It is most likely that this “five-sites” rule is the molecular basis of spectral tuning in the MWS and LWS pigments during vertebrate evolution.

A New Genus of Ergasilidae (Copepoda: Cyclopoida) from the Gills of Astyanax fasciatus (Cuvier, 1819) (Actinopterygii: Characidae)

2019 ◽  
Vol 64 (4) ◽  
pp. 850-865 ◽  
Author(s):  
Rodrigo Bravin Narciso ◽  
Heleno Brandão ◽  
Gilmar Perbiche-Neves ◽  
Reinaldo José da Silva
Keyword(s):  
New Genus ◽  
Astyanax Fasciatus ◽  
Copepoda Cyclopoida

Morphological and molecular characterisation of Aporcelaimellus simplex (Thorne & Swanger, 1936) Loof & Coomans, 1970 and a new concept for Aporcella Andrássy, 2002 (Dorylaimida: Aporcelaimidae)

Nematology ◽  
2013 ◽  
Vol 15 (2) ◽  
pp. 165-178 ◽  
Author(s):  
Sergio Álvarez-Ortega ◽  
Sergei A. Subbotin ◽  
Reyes Peña-Santiago
Keyword(s):  
Molecular Data ◽  
Evolutionary Tree ◽  
Valid Species ◽  
Molecular Characterisation ◽  
New Combinations ◽  
Terminal Portion ◽  
Significant Difference ◽  
European Populations ◽  
Emended Diagnosis

This contribution presents a study of Iberian and Californian populations of Aporcelaimellus simplex, including morphological, morphometric and molecular data. The species is characterised and distinguished by its lip region offset by an expansion, pars refringens vaginae absent, and conical tail with a small but distinct hyaline terminal portion. No significant difference exists between American and European populations. Molecular data and the derived evolutionary tree show a topology in which this species forms a well-supported group with members of Discolaiminae, far from other representatives of Aporcelaimellus. Putting special emphasis in the absence of pars refringens vaginae, A. simplex is transferred to the genus Aporcella. The taxonomy of this genus is revised in depth, with the proposal of an emended diagnosis, the provision of a list of 13 valid species (mostly new combinations from Aporcelaimellus) as well as a key to their identification and a compendium of their main morphometrics. Aporcella debruinae sp. n. is proposed for Aporcelaimellus papillatus apud de Bruin & Heyns, 1992.

Five new species of Oncholaimellus (Oncholaimidae: Nematoda) from north-east Brazil, with an emended diagnosis and an updated key to the genus

2014 ◽  
Vol 94 (4) ◽  
pp. 703-727 ◽  
Author(s):  
Patrícia Fernandes Neres ◽  
Maria Cristina da Silva ◽  
Geruso Vieira de Miranda-Júnior ◽  
Verônica Fonsêca-Genevois ◽  
André Morgado Esteves
Keyword(s):  
New Species ◽  
Continental Shelf ◽  
North East ◽  
Potiguar Basin ◽  
Tail Shape ◽  
Emended Diagnosis

Five new species of Oncholaimellus are described. They were found in macrofauna samples from the continental shelf in the Potiguar Basin, north-east Brazil. Cuticular pores with a sclerotized outline associated with a gland were observed in some species. Oncholaimellus multiporus sp. nov. is differentiated from other species by the presence of cuticular pores of different sizes; the smaller pores are abundant and give an appearance of ornamentation. Oncholaimellus intersexus sp. nov. and O. distortus sp. nov. are similar, but differ in the size of the external labial and cephalic setae compared to the corresponding diameter, the presence of the cuticular pores and the tail shape. Oncholaimellus paulus sp. nov. and O. sineporus sp. nov. are similar, although features such as the external labial and cephalic setae size compared to the corresponding diameter and the cuticular pores differentiate between them.

scholarly journals First report of Dendrorchis retrobiloba Volonterio & Ponce de León, 2005 (Digenea, Gorgoderidae) in Astyanax aff. fasciatus (Cuvier, 1819) (Characiformes, Characidae) from southern Brazil

Check List ◽  
2019 ◽  
Vol 15 (3) ◽  
pp. 357-361 ◽  
Author(s):  
Moisés Gallas ◽  
Laura Roberta Pinto Utz
Keyword(s):  
Ventral Sucker ◽  
Oral Sucker ◽  
Geographic Distribution ◽  
Rio Grande ◽  
Swim Bladder ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
First Report ◽  
Astyanax Fasciatus

Dendrorchis retrobiloba Volonterio & Ponce de León, 2005 was first described from the swim bladder of Astyanax fasciatus (Cuvier, 1819) from Montevideo, Uruguay. In this study, we necropsied specimens of A. aff. fasciatus collected from Lake Guaíba, in Rio Grande do Sul, Brazil, for the analysis of their helminths. The digeneans were identified as D. retrobiloba by their elongated body, oral sucker longer than ventral sucker, and 2 posterior lobes. This is the first report of D. retrobiloba in A. aff. fasciatus from Lake Guaíba and extends the known geographic distribution of this parasite.

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