scholarly journals Molecular phylogeny and biogeographic history of the Neotropical tribe Glandulocaudini (Characiformes: Characidae: Stevardiinae)

2018 ◽  
Vol 16 (1) ◽  
Author(s):  
Priscila Camelier ◽  
Naércio Aquino Menezes ◽  
Guilherme José Costa-Silva ◽  
Claudio Oliveira
Keyword(s):  
Molecular Clock ◽  
Dna Sequences ◽  
Valid Species ◽  
Molecular Evidence ◽  
Sea Level Fluctuations ◽  
Biogeographic History ◽  
History Of ◽  
Clock Analysis ◽  
First Time ◽  
Atlantic Coastal

ABSTRACT Although former studies on systematics and biogeography represent a progress on the knowledge of the tribe Glandulocaudini, none was grounded on molecular evidence. Thus, the first hypothesis of relationships for the tribe based on a multilocus analysis is presented, including all genera and most of the valid species. DNA sequences of Glandulocauda caerulea and Mimagoniates sylvicola were analyzed for the first time. A molecular clock analysis was used to estimate the origin of the Glandulocaudini and the approximate timing of cladogenetic events within the group. Glandulocaudini was recovered as monophyletic. No hypothesis recovered Glandulocauda as monophyletic, since G. melanopleura is sister to Lophiobrycon weitzmani while G. caerulea is closely related to Mimagoniates. The relationships within the latter genus were resolved. The molecular clock results indicate the origin of the Glandulocaudini during the Miocene with diversification in the group occurring from Neogene to Pleistocene. These results corroborated the hypothesis that its origin took place on the Brazilian crystalline shield with the subsequent occupation of the Atlantic Coastal drainages. Apparently, Pleistocene sea-level fluctuations might have shaped the distribution pattern of some species in Glandulocaudini.

Systematics of the Boana semilineata species group (Anura: Hylidae), with a description of two new species from Amazonian Ecuador

2020 ◽  
Vol 190 (1) ◽  
pp. 149-180
Author(s):  
Marcel A Caminer ◽  
Santiago R Ron
Keyword(s):  
Dna Sequences ◽  
Phylogenetic Relationships ◽  
Species Group ◽  
Valid Species ◽  
Undescribed Species ◽  
Phenotypic Characters ◽  
Species Complexes ◽  
Candidate Species ◽  
Amazonian Ecuador ◽  
First Time

Abstract The combination of genetic and phenotypic characters for species delimitation has allowed the discovery of many undescribed species of Neotropical amphibians. In this study, we used DNA sequences (genes 12S, 16S, ND1 and COI) and morphologic, bioacoustic and environmental characters of the Boana semilineata group to evaluate their phylogenetic relationships and assess their species limits. In addition, we included DNA sequences of several species of Boana to explore cryptic diversity in other groups. We found three Confirmed Candidate Species (CCS) within the B. semilineata group. Holotype examination of Hyla appendiculata shows that it is a valid species that corresponds to one of the CCS, which is here transferred to Boana. We describe the two remaining CCS. Our phylogeny highlights a number of secondary but meaningful observations that deserve further investigation: (1) populations of B. pellucens from northern Ecuador are more closely related to B. rufitela from Panama than to other Ecuadorian populations of B. pellucens; (2) we report, for the first time, the phylogenetic relationships of B. rubracyla showing that it is closely related to B. rufitela and B. pellucens; and (3) B. cinerascens and B. punctata form two species complexes consisting of several unnamed highly divergent lineages. Each of these lineages likely represents an undescribed species.

scholarly journals Jumping through the hoops: the challenges of daffodil (Narcissus) classification

2019 ◽  
Vol 190 (4) ◽  
pp. 389-404 ◽  
Author(s):  
Kálmán Könyves ◽  
John David ◽  
Alastair Culham
Keyword(s):  
Dna Sequences ◽  
Phylogenetic Trees ◽  
Plastid Dna ◽  
Microsatellite Data ◽  
Population Sampling ◽  
Molecular Phylogenetic ◽  
History Of ◽  
Nuclear Microsatellite ◽  
Congruent Group ◽  
First Time

Abstract Hoop-petticoat daffodils are a morphologically congruent group comprised of two distinct lineages in molecular phylogenetic trees of Narcissus. It is possible that the morphological similarity is a product of both historic and current low-level gene flow between these lineages. For the first time, we report population sampling from across the entire range of distribution covering the Iberian Peninsula and Morocco. In total, 455 samples were collected from 59 populations. Plastid DNA sequences of matK and ndhF were generated alongside 11 microsatellite loci to permit comparison between plastid and nuclear lineage histories. The plastid DNA phylogenetic tree was highly congruent with previous molecular studies and supported the recognition of these two lineages of hoop-petticoat daffodils as separate sections. Assignment of samples to sections sometimes differed between plastid DNA and (nuclear) microsatellite data. In these cases, the taxa had previously been the focus of dissent in taxonomic placement based on morphology. These discrepancies could be explained by hybridization and introgression among the two lineages during the evolution of hoop-petticoat daffodils, and shows that placement of species in sections is dependent on the source of data used. This study underlines the complex evolutionary history of Narcissus and highlights the discrepancies between floral morphology and phylogeny, which provides a continuing challenge for the systematics of Narcissus.

Morphological, biogeographical and molecular evidence of Carpocoris mediterraneus as a valid species (Hemiptera: Pentatomidae)

Zootaxa ◽  
2013 ◽  
Vol 3609 (4) ◽  
pp. 392-410 ◽  
Author(s):  
ROLAND LUPOLI ◽  
FRANÇOIS DUSOULIER ◽  
ASTRID CRUAUD ◽  
SANDRINE CROS-ARTEIL ◽  
JEAN-CLAUDE STREITO
Keyword(s):  
Western Europe ◽  
Distribution Patterns ◽  
Species Level ◽  
Valid Species ◽  
Molecular Evidence ◽  
Cytochrome C Oxidase I ◽  
European Species ◽  
Genetic Lineages ◽  
Phylogenetic Reconstructions ◽  
First Time

Carpocoris mediterraneus Tamanini, 1958, synonymized with Carpocoris fuscispinus (Boheman, 1851) by Ribes et al. (2007), is restored to the species level. The shape of the pronotum is a good diagnostic character to distinguish the two species. The existence of two valid species is supported by geographical distribution patterns in Western Europe: Medi-terranean-Atlantic for C. mediterraneus, and Continental for C. fuscispinus. In France and Spain, in some areas, the two species are found in sympatry (sometimes even on the same plant). Morphological observations are confirmed at the mo-lecular level by sequencing of the mitochondrial Cytochrome c oxidase I standard barcode fragment. Indeed, inter-specific divergence largely exceeded intra-specific divergence and our phylogenetic reconstructions reveal that Carpocoris medi-terraneus and Carpocoris fuscispinus form two reciprocally monophyletic genetic lineages. A morphological identifica-tion key is proposed for all the European species of the genus Carpocoris, to facilitate identification. Carpocoris fuscispinus is first time recorded from Portugal.

scholarly journals Revision of the land snail genus Landouria Godwin-Austen, 1918 (Gastropoda, Camaenidae) from Java

2019 ◽  
Author(s):  
Ayu Savitri Nurinsiyah ◽  
Marco T. Neiber ◽  
Bernhard Hausdorf
Keyword(s):  
Molecular Phylogeny ◽  
Dna Sequences ◽  
Land Snail ◽  
Monophyletic Group ◽  
Valid Species ◽  
Wallace’S Line ◽  
First Time

A revision of the land snail genus Landouria Godwin-Austin, 1918 (Camaenidae) from Java reveals that this group represents the most diverse land snail radiation on that island. Only six species of Landouria were recognized from Java in the last revision of the genus based on shell characters. Our investigation, which also considers the genitalia as well as DNA sequences, shows that the diversity in Java is much higher. Based on newly collected specimens as well as museum material, twenty-eight species of Landouria from Java are described and figured. To stabilize the nomenclature, neotypes are designated for L. winteriana (Pfeiffer, 1842) and L. rotatoria (Pfeiffer, 1842). Sixteen species are described as new to science, i.e., L. naggsi sp. nov., L. parahyangensis sp. nov., L. nusakambangensis sp. nov., L. petrukensis sp. nov., L. tholiformis sp. nov., L. madurensis sp. nov., L. abdidalem sp. nov., L. sewuensis sp. nov., L. tonywhitteni sp. nov., L. sukoliloensis sp. nov., L. nodifera sp. nov., L. pacitanensis sp. nov., L. zonifera sp. nov., L. pakidulan sp. nov., L. dharmai sp. nov. and L. menorehensis sp. nov. Landouria conoidea (Leschke, 1914) comb. nov., L. intumescens (Martens, 1867) comb. nov., L. moussoniana (Martens, 1867) comb. nov., L. schepmani (Möllendorff, 1897) comb. nov. and L. leucochila (Gude, 1905) comb. nov. are considered valid species of the genus Landouria for the first time. Plectotropis kraepelini Leschke, 1914 syn. nov. is considered a probable synonym of L. winteriana (Pfeiffer, 1842), P. trichotrochium Möllendorff, 1897 syn. nov. is a synonym of L. epiplatia (Möllendorff, 1897) and the preoccupied name Helix squamulosa Martens, 1867 syn. nov. is a synonym of L. madurensis sp. nov. We estimate that there are actually more than fifty species of Landouria in Java because many shell samples could not be classified and because no material is available from several regions of the island. A molecular phylogeny reveals that the species from Java do not form a monophyletic group, but that at least one species from Timor is nested within Javanese clades. This means that the Oriental Landouria crossed Wallace’s line, the supposed border between the Oriental and Australo-Papuan regions, at least twice and supports the conclusion that Wallace’s line does not represent a more severe barrier for terrestrial organisms than other straits through the archipelago. Within the Javanese clades, species from western and eastern Java are mixed, indicating frequent dispersals also within Java.

scholarly journals Recent and Rapid Radiation of the Highly Endangered Harlequin Frogs (Atelopus) into Central America Inferred from Mitochondrial DNA Sequences

Diversity ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 360
Author(s):  
Juan Ramírez ◽  
César Jaramillo ◽  
Erik Lindquist ◽  
Andrew Crawford ◽  
Roberto Ibáñez
Keyword(s):  
Mitochondrial Dna ◽  
South America ◽  
Central America ◽  
Dna Sequences ◽  
Central American ◽  
Tree Model ◽  
South American Species ◽  
Biogeographic History ◽  
Museum Samples ◽  
History Of

Populations of amphibians are experiencing severe declines worldwide. One group with the most catastrophic declines is the Neotropical genus Atelopus (Anura: Bufonidae). Many species of Atelopus have not been seen for decades and all eight Central American species are considered “Critically Endangered”, three of them very likely extinct. Nonetheless, the taxonomy, phylogeny, and biogeographic history of Central American Atelopus are still poorly known. In this study, the phylogenetic relationships among seven of the eight described species in Central America were inferred based on mitochondrial DNA sequences from 103 individuals, including decades-old museum samples and two likely extinct species, plus ten South American species. Among Central American samples, we discovered two candidate species that should be incorporated into conservation programs. Phylogenetic inference revealed a ladderized topology, placing species geographically furthest from South America more nested in the tree. Model-based ancestral area estimation supported either one or two colonization events from South America. Relaxed-clock analysis of divergence times indicated that Atelopus colonized Central America prior to 4 million years ago (Ma), supporting a slightly older than traditional date for the closure of the Isthmus. This study highlights the invaluable role of museum collections in documenting past biodiversity, and these results could guide future conservation efforts. An abstract in Spanish (Resumen) is available as supplementary material.

The catshark genus Scyliorhinus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae): taxonomy, morphology and distribution

Zootaxa ◽  
2019 ◽  
Vol 4601 (1) ◽  
pp. 1 ◽  
Author(s):  
KARLA D. A. SOARES ◽  
MARCELO R. DE CARVALHO
Keyword(s):  
Geographic Distribution ◽  
Junior Synonym ◽  
External Morphology ◽  
Valid Species ◽  
Tooth Morphology ◽  
Diagnostic Characters ◽  
Lack Of Information ◽  
The Family ◽  
History Of ◽  
First Time

The catshark genus Scyliorhinus belongs to the family Scyliorhinidae, the most diverse family of sharks, and currently presents 16 valid species according to most modern accounts. The long history of taxonomic rearrangements and inaccurate descriptions of many species have contributed to misidentification of specimens and lack of information on the distributional range and diagnostic characters of its species. Species of Scyliorhinus are reviewed and redescribed here, with detailed descriptions on external morphology, neurocranium, claspers, dermal denticles, and tooth morphology provided for the first time for all species. Sixteen species are recognized as valid: Scyliorhinus boa (Goode & Bean, 1896), S. cabofriensis Soares, Gomes & de Carvalho, 2016, S. canicula (Linnaeus, 1758), S. capensis (Müller & Henle, 1838), S. cervigoni Maurin & Bonnet, 1970, S. comoroensis Compagno, 1988, S. duhamelii (Garman, 1913), S. garmani (Fowler, 1934), S. haeckelii (Miranda Ribeiro, 1907), S. hesperius Springer, 1966, S. meadi Springer, 1966, S. retifer (Garman, 1881), S. stellaris (Linnaeus, 1758), S. torazame (Tanaka, 1908), S. torrei Howell-Rivero, 1936, and S. ugoi Soares, Gomes & Gadig, 2015. The main taxonomic decisions herein taken include the resurrection of S. duhamelii (previously a junior synonym of S. canicula) and the synonimization of S. tokubee with S. torazame. Information on geographic distribution was updated for most species, especially for those with wide ranges (S. canicula, S. haeckelii, S. retifer, and S. stellaris).

First description of monogenean parasites in Lake Tanganyika: the cichlid Simochromis diagramma (Teleostei, Cichlidae) harbours a high diversity of Gyrodactylus species (Platyhelminthes, Monogenea)

Parasitology ◽  
2010 ◽  
Vol 138 (3) ◽  
pp. 364-380 ◽  
Author(s):  
MAARTEN P. M. VANHOVE ◽  
JOS SNOEKS ◽  
FILIP A. M. VOLCKAERT ◽  
TINE HUYSE
Keyword(s):  
Dna Sequences ◽  
Host Species ◽  
Lake Tanganyika ◽  
Cichlid Fish ◽  
Copulatory Organ ◽  
Fish Parasites ◽  
Nuclear Ribosomal Dna ◽  
Single Host ◽  
History Of ◽  
First Time

SUMMARYLake Tanganyika harbours the most diverse endemic cichlid fish assemblage of Africa, but its monogenean fish parasites have not been investigated. Here we report, for the first time, on the Gyrodactylus parasites in this hotspot of fish biodiversity. Haptor morphometrics and nuclear ribosomal DNA sequences revealed 3 new species on Zambian Simochromis diagramma: Gyrodactylus sturmbaueri n. sp., G. thysi n. sp. and G. zimbae n. sp. Their distinct morphology and strong genetic differentiation suggest that they belong to distant lineages within the genus Gyrodactylus, and phylogenetic reconstructions suggest affinities with other genera of gyrodactylids. Additional U-shaped haptoral plates in G. thysi n. sp. and a second large spine-like structure in the male copulatory organ of G. zimbae seem to represent new features for the genus. Such large diversity on a single host species can probably be explained by host-switching events during the course of evolution, in agreement with the generally accepted concept that ecological transfer is an important aspect of gyrodactylid speciation. Additional parasitological surveys on other host species, covering a broader phylogenetic and geographical range, should clarify the evolutionary history of Gyrodactylidae on cichlids in the African Great Lake and other parts of Africa.

scholarly journals Redescription of the Neotropical species Trichodischia soror Bigot, 1885 (Diptera: Tachinidae), with a new generic synonymy

2021 ◽  
Vol 61 ◽  
pp. e20216164
Author(s):  
Deivys M. Alvarez-Garcia ◽  
Marcelo Domingos de Santis
Keyword(s):  
Host Record ◽  
Junior Synonym ◽  
Type Material ◽  
Valid Species ◽  
Neotropical Species ◽  
Taxonomic History ◽  
History Of ◽  
First Time

Trichodischia Bigot, 1885 is a Neotropical genus with a confusing taxonomic history. This was initially composed of two species: T. caerulea Bigot, 1885 and T. soror Bigot, 1885. Later, the genus Trichoraea Cortés, 1974 was erected for T. caerulea. When reviewing the taxonomic history of both species, we discovered that both genera have been considered synonymous based on erroneous information and without a formal synonymy being proposed. Herein, we redescribed T. soror, provide images of adults and describe the male terminalia for the first time. In addition, by examining the type material, we propose Trichoraea as a junior synonym of Trichodischia, syn. nov., confirm T. caerulea comb. rest. and T. soror as valid species and provide some comments about the taxonomy and host record of the genus.

Revision of the Australian Stephanidae (Hymenoptera)

2001 ◽  
Vol 15 (6) ◽  
pp. 763 ◽  
Author(s):  
Alexandre P. Aguiar
Keyword(s):  
New Taxa ◽  
Morphological Characters ◽  
Junior Synonym ◽  
Valid Species ◽  
As Species ◽  
Taxonomic Importance ◽  
History Of ◽  
Character Set ◽  
Taxonomic Studies ◽  
First Time

The Australian Stephanidae (Hymenoptera) are revised and keyed. Three genera and 21 species (15 new) are recognised. The taxonomic importance of over 300 morphological characters, including 45 morphometric ratios, is assessed. The history of introduction and establishment of Schlettererius cinctipes in Australia is summarised. Stephanus crassicauda Morley is transferred to Megischus, the female is redescribed and the male is reported for the first time and compared with the female. Occurrence of the Neotropical genus Hemistephanus in Australia is refuted and M. giganteus (Girault) is synonymised with M. crassicauda (Morley). The groundplan of Australian Parastephanellus is described in detail and a new character set is proposed for taxonomic studies and descriptions of its species, P. albiceps Elliott is proposed as a junior synonym of P. damellicus (Westwood) and P. picticeps Roman is placed as species inquirendum. New taxa are Megischus ceneonatrix, Parastephanellus albigenuis, P. adiazetos, P. brevis, P. callidictyon, P. denotatus, P. isoglyptos, P. laevigatus, P. maculatus, P. platyceratus, P. squamatus, P. strigosus, P. tanytarsus, P. trifasciatus and P. vertipictus. Other valid species from Australia are P. caudatus Elliott and P. rufoornatus (Cameron).

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 ◽  
...  
Keyword(s):  
New Species ◽  
Dna Sequences ◽  
Taxonomic Status ◽  
Sensu Stricto ◽  
Zoological Nomenclature ◽  
Valid Species ◽  
Molecular Evidence ◽  
Type Host ◽  
Three New Species ◽  
Single Sequence

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.

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