scholarly journals A new miniature Pristella (Actinopterygii: Characiformes: Characidae) with reversed sexual dimorphism from the rio Tocantins and rio São Francisco basins, Brazil

2021 ◽  
pp. 339-348
Author(s):  
F.C.T. Lima ◽  
R.A. Caires ◽  
C.C. Conde-Saldaña ◽  
J.M. Mirande ◽  
F.R. Carvalho
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Sexual Dimorphism ◽  
Color Pattern ◽  
Bony Fishes ◽  
Reversed Sexual Dimorphism ◽  
A New Species

A new species of the genus Pristella Eigenmann, 1908 (Pristella crinogi sp. nov.) is described from the middle rio Tocantins and middle rio São Francisco basins, Brazil. The new species can be diagnosed from its two congeners, Pristella ariporo Conde-Saldaña, Albornoz-Garzón, García-Melo, Villa-Navarro, Mirande, and Lima, 2019 and Pristella maxillaris (Ulrey, 1894), by a combination of color pattern and teeth morphology characters. A phylogenetic analysis of the genus recovered P. crinogi as the sister taxa of P. ariporo. Pristella crinogi, along with P. ariporo, are the first characiform fishes, and one of the first bony fishes, to be reported as presenting a reversed sexual dimorphism, with females presenting a more developed color pattern than males. Comments on the miniaturization of the species, as well as remarks on the biogeography of the genus Pristella, are presented.

A new fouling Hydroides (Annelida, Sabellida, Serpulidae) from southern Gulf of California

2015 ◽  
pp. 1-13 ◽  
Author(s):  
María Ana Tovar-Hernández ◽  
Tulio F. Villalobos-Guerrero ◽  
Elena K. Kupriyanova ◽  
Yanan Sun
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Sexual Dimorphism ◽  
Gulf Of California ◽  
Sequence Data ◽  
Marine Fouling ◽  
Size And Shape ◽  
Broadcast Spawner ◽  
Polychaete Family ◽  
A New Species

Members of the tubicolous polychaete family Serpulidae constitute one of the most important groups of marine fouling biota. This paper describes a new species of the serpulid genusHydroidesfrom dock fouling at Mazatlán (southern Gulf of California), providing information about live colouration and reproductive features.Hydroides dolabrussp. nov. belongs to a subgroup of species in which verticil spines are equal in size and shape, lack both external and lateral spinules, but have various modifications to their tips. However,Hydroides dolabrussp. nov. is distinct in having tips of verticil spines pickaxe-shaped, with asymmetrical triangular radially orientated projections: the internal projections are short and point inward the verticil centre, while longer external projections point outward the verticil centre. Like all species of the genus,H. dolabrussp. nov. is a gonochoristic broadcast spawner lacking sexual dimorphism. A phylogenetic analysis of Hydroides based on COI, 18S and cytbsequence data reveals thatH. dolabrussp. nov. is genetically distinct from other species ofHydroidesfor which sequence data are available. The new species is the 11th in the genus described from Mexican waters.

A new species of Gonatodes (Squamata: Sphaerodactylidae) from the western versant of the Cordillera de Mérida, Venezuela

Zootaxa ◽  
2017 ◽  
Vol 4291 (3) ◽  
pp. 549 ◽  
Author(s):  
WALTER E. SCHARGEL ◽  
GILSON A. RIVAS ◽  
JUAN E. GARCÍA-PÉREZ ◽  
CARLOS RIVERO-BLANCO ◽  
PAUL T. CHIPPINDALE ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Ornithine Decarboxylase ◽  
Nuclear Gene ◽  
Color Pattern ◽  
The Past ◽  
A New Species

Gonatodes rayito sp. nov. is described from the western versant of the Cordillera de Mérida, Venezuela. Like most species of Gonatodes the new species is sexually dichromatic and is one of only a few in the genus in which individuals have a conspicuous, pale middorsal stripe. The new species is similar to, and has been confused in the past with, G. petersi and G. vittatus. It differs from both species in several aspects of color pattern, and also from G. vittatus in size and scale counts. The validity of Gonatodes rayito sp. nov. is also strongly supported by a phylogenetic analysis using a fragment of the ornithine decarboxylase nuclear gene. 

A new species of Lepidocephalichthys (Teleostei: Cobitidae) with distinctive sexual dimorphism and comments on relationships in southern lineages of Cobitidae

Zootaxa ◽  
2010 ◽  
Vol 2557 (1) ◽  
pp. 1 ◽  
Author(s):  
JUSTIN C. HAVIRD ◽  
LAWRENCE M. PAGE ◽  
WEERAPONGSE TANGJITJAROEN ◽  
CHAVALIT VIDTHAYANON ◽  
CHAIWUT GRUDPAN ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Sexual Dimorphism ◽  
Fin Ray ◽  
New Material ◽  
A New Species

Lepidocephalichthys (Telostei:Cobitidae) is diagnosed as being unique among cobitids in having the 7–8th pectoral rays of mature males modified. Recently collected material from Thailand included a new species of Lepidocephalichthys in which mature males have a large (extending over ~75% of the fin-ray length) dorsally projecting and serrated flange and a ventrally projecting flange. The ventrally projecting structure is unique among cobitids. An expanded phylogenetic analysis of cobitids, including previously published sequences and new material including the new species, reinforces the monophyly of Lepidocephalichthys. Relationships within southern lineages of cobitids, and the unusual habitat of the new species are discussed.

A new dendrobatid frog (Anura: Dendrobatidae: Anomaloglossus) from the Orinoquian rainforest, southern Venezuela

Zootaxa ◽  
2010 ◽  
Vol 2413 (1) ◽  
pp. 37 ◽  
Author(s):  
CÉSAR L. BARRIO-AMORÓS ◽  
JUAN CARLOS SANTOS ◽  
OLGA JOVANOVIC
Keyword(s):  
New Species ◽  
Sexual Dimorphism ◽  
Color Pattern ◽  
Morphological Features ◽  
Type Locality ◽  
Guiana Shield ◽  
Bright Orange ◽  
A New Species

A new species of Anomaloglossus is described from the Venezuelan Guayana; it is the 21 st described species of Anomaloglossus from the Guiana Shield, and the 15 th from Venezuela. This species inhabits rainforest on granitic substrate on the northwestern edge of the Guiana Shield (Estado Amazonas, Venezuela). The new species is distinguished from congeners by sexual dimorphism, its unique male color pattern (including two bright orange parotoid marks and two orange paracloacal spots on dark brown background), call characteristics and other morphological features. Though to the new species is known only from the northwestern edge of the Guiana Shield, its distribution may be more extensive, as there are no significant biogeographic barriers isolating the type locality from the granitic lowlands of Venezuela.

Culex (Culex) longitubus, A New Species of the Mimeticus Subgroup (Diptera: Culicidae) From Bhutan

2021 ◽  
Author(s):  
Pradya Somboon ◽  
Thanari Phanitchakun ◽  
Jassada Saingamsook ◽  
Rinzin Namgay ◽  
Ralph E Harbach
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Male Genitalia ◽  
Immature Stages ◽  
High Altitudes ◽  
Coi Sequences ◽  
Anal Papillae ◽  
A New Species

Abstract Culex longitubus Somboon, Namgay & Harbach is described as a new species of the Mimeticus Subgroup of the subgenus Culex. The larva is most similar to the larva of Cx. tianpingensis Chen from China, but is distinguished by the length of the siphon and the anal papillae, the form of the comb scales and pecten spines, and the development of setae 7-P, 13-T, 1-X, and 4-X. The adults have wing markings and male genitalia similar to those of species of the Mimeticus Complex. Phylogenetic analysis of COI sequences revealed that the new species is closely related to Cx. murrelli Lien of the Mimulus Complex. The immature stages of the new species were found in stagnant pools and marshes at high altitudes in several districts of Bhutan.

A new species of Cynomops (Chiroptera: Molossidae) from the northwestern slope of the Andes

Mammalia ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Daniela Arenas-Viveros ◽  
Pamela Sánchez-Vendizú ◽  
Alan Giraldo ◽  
Jorge Salazar-Bravo
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Molecular Data ◽  
Mtdna Sequences ◽  
The Andes ◽  
Western Side ◽  
Morphological And Molecular Data ◽  
A New Species ◽  
Lines Of Evidence

Abstract The systematics and taxonomy of the broadly distributed bats of the genus Cynomops has changed considerably in the last few years. Among the major changes, Cynomops abrasus was split into two species of large-bodied forms (Cynomops mastivus and C. abrasus) distributed east of the Andes. However, large Colombian specimens identified as C. abrasus from the western side of the Andes had yet to be included in any revisionary work. Phylogenetic analysis performed in this study, using mtDNA sequences (Cytochrome-b), revealed that these Colombian individuals are more closely related to Cynomops greenhalli. Morphological and molecular data allowed us to recognize populations from western Colombia, western Ecuador and northwestern Peru, as members of a new species of Cynomops. Characters that allow for its differentiation from C. greenhalli include a larger forearm, paler but more uniform ventral pelage, more globular braincase, and well-developed zygomatic processes of the maxilla (almost reaching the postorbital constriction). This study serves as another example of the importance of including multiple lines of evidence in the recognition of a new species. Given its rarity and the advanced transformation of its habitat, this new species is particularly important from a conservation perspective.

Description of a new species of Auriculostoma (Digenea: Allocreadiidae) from Characidium heirmostigmata (Characiformes: Crenuchidae) from Argentina, using morphological and molecular data

2021 ◽  
Vol 95 ◽  
Author(s):  
M.M. Montes ◽  
J. Barneche ◽  
Y. Croci ◽  
D. Balcazar ◽  
A. Almirón ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
National Park ◽  
Molecular Data ◽  
Rrna Gene ◽  
28S Rrna ◽  
The Family ◽  
Parasitological Survey ◽  
Morphological And Molecular Data ◽  
A New Species

Abstract During a parasitological survey of fishes at Iguazu National Park, Argentina, specimens belonging to the allocreadiid genus Auriculostoma were collected from the intestine of Characidium heirmostigmata. The erection of the new species is based on a unique combination of morphological traits as well as on phylogenetic analysis. Auriculostoma guacurarii n. sp. resembles four congeneric species – Auriculostoma diagonale, Auriculostoma platense, Auriculostoma tica and Auriculostoma totonacapanensis – in having smooth and oblique testes, but can be distinguished by a combination of several morphological features, hosts association and geographic distribution. Morphologically, the new species can be distinguished from both A. diagonale and A. platense by the egg size (bigger in the first and smaller in the last); from A. tica by a shorter body length, the genital pore position and the extension of the caeca; and from A. totonacapanensis by the size of the oral and ventral sucker and the post-testicular space. Additionally, one specimen of Auriculostoma cf. stenopteri from the characid Charax stenopterus (Characiformes) from La Plata River, Argentina, was sampled and the partial 28S rRNA gene was sequenced. The phylogenetic analysis revealed that A. guacurarii n. sp. clustered with A. tica and these two as sister taxa to A. cf. stenopteri. The new species described herein is the tenth species in the genus and the first one parasitizing a member of the family Crenuchidae.

The genus Xylaria (Xylariaceae) in the south of China—6. A new Xylaria species based on morphological and molecular characters

Phytotaxa ◽  
2013 ◽  
Vol 147 (2) ◽  
pp. 48 ◽  
Author(s):  
HAI-XIA MA ◽  
LARISSA VASILYEVA ◽  
YU LI
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Its Sequences ◽  
Guizhou Province ◽  
Nrdna Its ◽  
Undescribed Species ◽  
The South ◽  
A New Species ◽  
Molecular Characters

Xylaria fusispora, an undescribed species of Xylaria (Xylariales, Xylariaceae), is described and illustrated as a new species based on collections from Guizhou Province, China. Both morphology and phylogenetic analysis of nrDNA ITS sequences support the establishment of this new species. The fungus is characterized by its fusoid-equilateral ascospores and an ascus apical ring not bluing in Melzer’s reagent. The differences between the new species and the related fungi are discussed.

Pilaira australis sp. nov. (Mucorales, Mucoromycota) isolated from emu faeces in Australia

Phytotaxa ◽  
2017 ◽  
Vol 329 (3) ◽  
pp. 277 ◽  
Author(s):  
ANDREW S. URQUHART ◽  
PAULINE M. L. COULON ◽  
ALEXANDER IDNURM
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Species Identification ◽  
Internal Transcribed Spacers ◽  
Molecular Phylogenetic Analysis ◽  
Unique Combination ◽  
Dromaius Novaehollandiae ◽  
Molecular Phylogenetic ◽  
Carbon Utilisation ◽  
A New Species

Pilaira australis, a new species of fungus in the coprophilous genus Pilaira, was isolated from emu (Dromaius novaehollandiae) faeces and is described. Morphologically, the species resembles other species in the genus, particularly P. moreaui, except differs in its unique combination of sporangiophore height and sporangiospore length. Molecular phylogenetic analysis indicates that P. australis is distinct from other species in the genus with two regions, the internal transcribed spacers (ITS) and a fragment of the pyrG gene, showing 91% and 90% identity to the nearest species, respectively. Ultrastructure features and carbon utilisation were determined for P. australis, and may provide characteristics for species identification in this genus.

Ultrastructural and molecular characterization of Bacillidium vesiculoformis n. sp. (Microspora: Mrazekiidae) in the freshwater oligochaete Nais simplex (Oligochaeta: Naididae)

Parasitology ◽  
2004 ◽  
Vol 130 (1) ◽  
pp. 31-40 ◽  
Author(s):  
D. J. MORRIS ◽  
R. S. TERRY ◽  
K. B. FERGUSON ◽  
J. E. SMITH ◽  
A. ADAMS
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Infected Cell ◽  
Host Cell ◽  
Developmental Stages ◽  
Parasite Development ◽  
Adhesive Quality ◽  
Transmission Studies ◽  
A New Species

The development of a new species, Bacillidium vesiculoformis n. sp. (Microspora, Mrazekiidae), is described from the freshwater oligochaete Nais simplex (Oligochaeta, Naididae). Initial stages of parasite development consist of a monokaryotic merogony within a haemocyte of the intestinal blood sinus. The resulting hypertrophied haemocyte is attached to the chloragocytes of the sinus by fine cytoplasmic extensions with the sinus around the cell becoming greatly enlarged. The meronts within the haemocyte form diplokaryotic sporonts that undergo sporogenesis directly within the cytoplasm of the host cell. The infected cell becomes packed with spores and developmental stages, causing it dramatically to increase in size, eventually rupturing the oligochaete and cell. Sporogony appears to be disporoblastic. Released spores were observed to have an adhesive quality. Transmission studies conducted with mature spores failed to transmit the parasite horizontally although vertical transmission was observed. Phylogenetic analysis of the parasite demonstrated that B. vesiculoformis clustered with microsporidian parasites of bryozoa and two other microsporidians, Janacekia debaiseuxi and an unidentified Bacillidium sp.

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