Morphological features and molecular phylogeny of Hoferellus azevedoi n. sp. (Myxozoa: Myxobilatidae) found in Chaetobranchus flavescens Heckel, 1840 (Teleostei: Cichlidae) from Marajó Island, northern Brazil

A new genus of Gyponini, Sakakibarana gen. nov., is proposed and its type species S. amazonica sp. nov. is described and illustrated based on specimens from the Amazon Rainforest of Northern Brazil (states of Amazonas and Pará) and French Guiana. The new genus can be distinguished from other members of the Gyponini by the following morphological features: robust body, short crown, crown and face transition distinct and subfoliaceous, pronotum strongly declivous, male pygofer with caudal process, and aedeagus with dorsal apodemes with a pair of processes. A discussion comparing the new genus with the related genus Tenuacia DeLong, 1977 is provided.

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A review of Cryphocricos Signoret, 1850 (Naucoridae: Cryphocricinae) with descriptions of three new species

Zootaxa ◽

10.11646/zootaxa.4958.1.7 ◽

2021 ◽

Vol 4958 (1) ◽

pp. 72-94

Author(s):

ROBERT W. SITES

Keyword(s):

New Species ◽

Molecular Phylogeny ◽

Intraspecific Variation ◽

New World ◽

Morphological Features ◽

Type Specimens ◽

Three New Species ◽

Aquatic Bugs ◽

High Degree

The genus Cryphocricos Signoret, 1850 was recently determined in a molecular phylogeny to be distantly related to other taxa of the subfamily Cryphocricinae to the extent that it is now once again the sole member of the subfamily. This exclusively New World group of aquatic bugs lives in fast and usually turbulent current and respires by means of a plastron. Efforts to identify morphological features to distinguish among the species have largely fallen short, and some species have been established based on features that exhibit a high degree of intraspecific variation overlapping those of other species. Presented here is a review of the 13 described species with discussions of their features and photos of type specimens, and three new species from Venezuela and Colombia are described. Also presented is a diagnostic attribute unique to the enigmatic Cryphocricos barozzii Signoret, 1850.

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Late Quaternary drainage dynamics in northern Brazil based on the study of a large paleochannel from southwestern Marajó Island

Anais da Academia Brasileira de Ciências ◽

10.1590/s0001-37652008000300017 ◽

2008 ◽

Vol 80 (3) ◽

pp. 579-593 ◽

Cited By ~ 11

Author(s):

Dilce F. Rossetti ◽

Ana M. Góes

Keyword(s):

Remote Sensing ◽

Forest Cover ◽

Late Quaternary ◽

Drainage System ◽

Perfect Agreement ◽

Marajó Island ◽

Northern Brazil ◽

Remote Sensing Mapping ◽

The Town ◽

Tectonic Origin

Marajó Island shows an abundance of paleochannels easily mapped in its eastern portion, where vegetation consists mostly of savannas. SRTM data make possible to recognize paleochannels also in western Marajó, even considering the dense forest cover. A well preserved paleodrainage network from the adjacency of the town of Breves (southwestern Marajó Island) was investigated in this work combining remote sensing and sedimentological studies. The palimpsest drainage system consists of a large meander connected to narrower tributaries. Sedimentological studies revealed mostly sharp-based, fining upward sands for the channelized features, and interbedded muds and sands for floodplain areas. The sedimentary structures and facies successions are in perfect agreement with deposition in channelized and floodplain environments, as suggested by remote sensing mapping. The present study shows that this paleodrainage was abandoned during Late Pleistocene, slightly earlier than the Holocene paleochannel systems from the east part of the island. Integration of previous studies with the data available herein supports a tectonic origin, related to the opening of the Pará River along fault lineaments. This would explain the disappearance of large, north to northeastward migrating channel systems in southwestern Marajó Island, which were replaced by the much narrower, south to southeastward flowing modern channels.

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Tectonic control on the stratigraphic framework of Late Pleistocene and Holocene deposits in Marajó Island, State of Pará, eastern Amazonia

Anais da Academia Brasileira de Ciências ◽

10.1590/s0001-37652010000200020 ◽

2010 ◽

Vol 82 (2) ◽

pp. 439-449 ◽

Cited By ~ 6

Author(s):

Dilce F. Rossetti

Keyword(s):

Late Quaternary ◽

Fault Reactivation ◽

Passive Margin ◽

Stratigraphic Correlation ◽

Sedimentary Records ◽

Stratigraphic Framework ◽

Island State ◽

Marajó Island ◽

Northern Brazil

The traditional view that the Brazilian Amazonia is located in a tectonically stable area since the Cretaceous is changing in front of the increasing documentation of fault reactivations even during the Holocene. How the sedimentary record has responded to these events is an issue that remains to be approached with basis on field data. This work focuses on the stratigraphic correlation of late Quaternary deposits from eastern Marajó Island, with the goal of demonstrating the role of fault reactivation on the origin and preservation of these deposits. Despite the location in a stable platform of a continental passive margin, three studied stratigraphic units display significant vertical offsets that define two depocenters that are better explained through tectonic displacements. This interpretation is reinforced by several morphostructural features related to faults that occur between the studied drills. Without the influence of tectonics, sediment preservation in this characteristically low-lying terrain would have been negligible. The results of the present work motivate to look for other tectonically-influenced areas in Amazonia, which similarly might have acted as sites for sediment accommodation during the late Quaternary. These sedimentary records have great potential to be the source of valuable information for reconstructing Quaternary geological events in Northern Brazil.

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A new Synbranchus (Teleostei: Synbranchiformes: Synbranchidae) from ilha de Marajó, Pará, Brazil, with notes on its reproductive biology and larval development

Neotropical Ichthyology ◽

10.1590/s1679-62252005000300001 ◽

2005 ◽

Vol 3 (3) ◽

pp. 319-328 ◽

Cited By ~ 9

Author(s):

Sandra E. Favorito ◽

Angela M. Zanata ◽

Maria I. Assumpção

Keyword(s):

New Species ◽

Larval Development ◽

Reproductive Biology ◽

Color Pattern ◽

The Other ◽

Larval Stages ◽

Marajó Island ◽

Northern Brazil

Synbranchus lampreia, new species, is described from rio Goiapi, Marajó Island, Pará, northern Brazil. It differs from the other two described species of the genus by its color pattern, which consists of large roundish black blotches scattered over a light brown or yellowish ground pigmentation and presence of inconspicuous brown small spots distributed among the large dark spots. The species is further distinguished from S. marmoratus by a higher number of vertebrae and from S. madeira by a shorter postanal length. Information about reproductive aspects is provided and larval stages are described and illustrated.

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A taxonomic revision and molecular phylogeny of the eastern Palearctic species of the genera Schizomyia Kieffer and Asteralobia Kovalev (Diptera, Cecidomyiidae, Asphondyliini), with descriptions of five new species of Schizomyia from Japan

ZooKeys ◽

10.3897/zookeys.808.29679 ◽

2018 ◽

Vol 808 ◽

pp. 123-160 ◽

Cited By ~ 6

Author(s):

Ayman Khamis Elsayed ◽

Junichi Yukawa ◽

Makoto Tokuda

Keyword(s):

Phylogenetic Analysis ◽

New Species ◽

Molecular Phylogeny ◽

Type Species ◽

Taxonomic Revision ◽

Morphological Features ◽

Molecular Phylogenetic Analysis ◽

Taxonomic Treatment ◽

Molecular Phylogenetic ◽

Palearctic Species

The genus Asteralobia (Diptera, Cecidomyiidae, Asphondyliini, Schizomyiina) was erected by Kovalev (1964) based on the presence of constrictions on the cylindrical male flagellomeres. In the present study, we examine the morphological features of Asteralobia and Schizomyia and found that the male flagellomeres are constricted also in Schizomyiagaliorum, the type species of Schizomyia. Because no further characters clearly separating Asteralobia from Schizomyia were observed, we synonymize Asteralobia under Schizomyia. Molecular phylogenetic analysis strongly supports our taxonomic treatment. We describe five new species of Schizomyia from Japan, S.achyranthesae Elsayed & Tokuda, sp. n., S.diplocyclosae Elsayed & Tokuda, sp. n., S.castanopsisae Elsayed & Tokuda, sp. n., S.usubai Elsayed & Tokuda, sp. n., and S.paederiae Elsayed & Tokuda, sp. n., and redescribe three species, S.galiorum Kieffer, S.patriniae Shinji, and S.asteris Kovalev. A taxonomic key to the Japanese Schizomyia species is provided.

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First report of Anisakis sp. (Nematoda: Anisakidae) parasitizing Muscovy duck in Marajó Island, state of Pará, Brazil

Revista Brasileira de Parasitologia Veterinária ◽

10.1590/s1984-29612020015 ◽

2020 ◽

Vol 29 (2) ◽

Author(s):

Elaine Lopes de Carvalho ◽

Ricardo Luis Sousa Santana ◽

Evonnildo Costa Gonçalves ◽

Raul Henrique da Silva Pinheiro ◽

Elane Guerreiro Giese

Keyword(s):

Climatic Conditions ◽

Human Consumption ◽

Esophageal Mucosa ◽

Muscovy Duck ◽

Cairina Moschata ◽

Island State ◽

Third Stage ◽

Marajó Island ◽

Northern Brazil ◽

Muscovy Ducks

Abstract Among the avian used for human consumption, the Muscovy duck is well adapted to various climatic conditions and its breeding is widespread due to its easy handling, and its meat is widely consumed and appreciated, especially in the cuisine of northern Brazil. The present study aimed to report and identify taxonomically the nematodes found in the esophagus of Muscovy ducks reared and marketed in the municipality of Soure, Marajó Island, state of Pará, Brazil, and discuss its zoonotic potential to human. The samples consisted of 30 specimens of Cairina moschata domestica analyzed. A total of 258 nematodes were recovered, which were strongly fixed in the esophageal mucosa of hosts. The morphological and morphometric characteristics were compatible with Anisakis third-stage larvae.

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Morphology and molecular phylogeny reveal two new species in Russula sect. Ingratae from China

Phytotaxa ◽

10.11646/phytotaxa.525.2.2 ◽

2021 ◽

Vol 525 (2) ◽

pp. 109-123

Author(s):

BIN CHEN ◽

JIE SONG ◽

JIN-HUA ZHANG ◽

JUN-FENG LIANG

Keyword(s):

New Species ◽

Molecular Phylogeny ◽

New Taxa ◽

Phylogenetic Analyses ◽

Morphological Features ◽

Pale Yellow ◽

Light Yellow ◽

Two New Species ◽

Yellowish White

Two new species of Russula are described and illustrated in this paper. Russula clavulus is recognised by a pale yellow pileus centre, white margin with tuberculate striation, white to pale lamellae with small pale yellow spots, white to light yellow spore print, subglobose to broadly ellipsoid spores with short or long ridges and hymenial cystidia on lamellae sides that are mainly subclavate or fusiform. Russula multilamellula is morphologically characterised by the brownish orange to hazel pileus centre and satin white to yellowish-white margin with brownish tinge, lamellulae that are usually irregular in length and often anastomosing with lamellae, subglobose to broadly ellipsoid spores with short or long ridges and clavate hymenial cystidia. The combination of morphological features and multigene phylogenetic analyses of ITS-nrLSU-RPB2-mtSSU data indicated that these two new taxa belong to Russula subg. Heterophyllidia sect. Ingratae.

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Molecular systematics of the Acmena alliance (Myrtaceae): phylogenetic analyses and evolutionary implications with reference to Australian taxa

Australian Systematic Botany ◽

10.1071/sb03009 ◽

2004 ◽

Vol 17 (1) ◽

pp. 63 ◽

Cited By ~ 15

Author(s):

M. G. Harrington ◽

P. A. Gadek

Keyword(s):

Bayesian Inference ◽

Molecular Phylogeny ◽

Molecular Systematics ◽

Novel Species ◽

Phylogenetic Analyses ◽

Morphological Features ◽

Parsimony Analysis ◽

Species Groups ◽

Difficult Sequences

The existence within Australia of several Acmena alliance taxa with morphological features inconsistent with current generic boundaries has meant that phylogenetic assessment of relationships has proved difficult. Sequences of nrDNA from the ITS and ETS regions were obtained for 66 Australian taxa, including representatives from both subfamilies and five genera. The ingroup taxa included 54 Australian endemics and 13 species with distributions that also range outside continental Australia. Parsimony analysis and Bayesian inference of posterior possibilities from the combined molecular datasets do not correlate with the species associations implied by the current taxonomic circumscription of genera: Acmena, Acmenosperma, Anetholea, Syzygium and Waterhousea. The molecular phylogeny recognises five supported lineages within the Acmena alliance, and several novel species associations. The recognition of five species groups indicates a need for a reappraisal of all currently recognised morphological groups within the alliance.

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