Results 21 to 30 of about 1,224 (156)

Alien spiders: First record of Loxosceles gaucho Gertsch, 1967 (Araneae: Sicariidae) in the Amazon region, Brazil [PDF]

open access: yesPapéis Avulsos de Zoologia, 2019
We present the first record for Loxosceles gaucho Gertsch, 1967 in the Amazonian region of Brazil. Four males, fifteen females and forty-nine immatures were collected in different places in Manaus, Amazonas, Brazil.
Marlus Queiroz Almeida   +5 more
doaj   +7 more sources

Under an integrative taxonomic approach: the description of a new species of the genus Loxosceles (Araneae, Sicariidae) from Mexico City [PDF]

open access: yesZooKeys, 2019
A new species of the spider genus Loxosceles Heineken & Lowe, 1832, Loxosceles tenochtitlan Valdez-Mondragón & Navarro-Rodríguez, sp. nov., is described based on adult male and female specimens from the states of Mexico City, Estado de ...
Alejandro Valdez-Mondragón   +4 more
doaj   +4 more sources

CYTOGENETIC STUDY IN SAND SPIDERS (SICARIIDAE) FROM THE BRAZILIAN CAATINGA: SEX CHROMOSOME SYSTEM DIVERSITY IN CLOSELY RELATED SPECIES [PDF]

open access: yesBAG. Journal of Basic and Applied Genetics, 2022
In this study, we investigated the chromosomes of three species of Sicarius spiders from the Brazilian Caatinga, using classical and molecular cytogenetic techniques.
Gimenez-Pinheiro T.   +4 more
doaj   +1 more source

Distribuição das espécies do gênero Loxosceles Heinecken & Lowe, 1835 (Araneae; Sicariidae) no Estado do Paraná

open access: yesRevista Da Sociedade Brasileira De Medicina Tropical, 2005
O Estado do Paraná registra anualmente uma média de 2.577 acidentes loxoscélicos por ano, logo o conhecimento da distribuição das espécies do gênero Loxosceles é extremamente importante para elaboração de ações de controle e manejo.
Marta Luciane Fischer
exaly   +2 more sources

Advances in the reconstruction of the spider tree of life: A roadmap for spider systematics and comparative studies

open access: yesCladistics, Volume 39, Issue 6, Page 479-532, December 2023., 2023
Abstract In the last decade and a half, advances in genetic sequencing technologies have revolutionized systematics, transforming the field from studying morphological characters or a few genetic markers, to genomic datasets in the phylogenomic era. A plethora of molecular phylogenetic studies on many taxonomic groups have come about, converging on, or
Siddharth Kulkarni   +2 more
wiley   +1 more source

Sexual selection and predation drive the repeated evolution of stridulation in Heteroptera and other arthropods

open access: yesBiological Reviews, Volume 98, Issue 3, Page 942-981, June 2023., 2023
ABSTRACT Acoustic and substrate‐borne vibrations are among the most widely used signalling modalities in animals. Arthropods display a staggering diversity of vibroacoustic organs generating acoustic sound and/or substrate‐borne vibrations, and are fundamental to our broader understanding of the evolution of animal signalling.
Leonidas‐Romanos Davranoglou   +2 more
wiley   +1 more source

Global expansion of a solitary‐social tropical spitting spider shaped by multiple long‐distance dispersals

open access: yesEcography, Volume 2023, Issue 3, March 2023., 2023
The spitting spider Scytodes fusca is a species complex well known for its unusual hunting technique which involves spitting a venomous sticky silken substance over its prey. Previous studies supposed that S. fusca was native to Central and South America but had expanded to the tropics of almost every continent.
Yufa Luo, Shuqiang Li
wiley   +1 more source

The biology and evolution of spider venoms

open access: yesBiological Reviews, Volume 97, Issue 1, Page 163-178, February 2022., 2022
ABSTRACT Spiders are diverse, predatory arthropods that have inhabited Earth for around 400 million years. They are well known for their complex venom systems that are used to overpower their prey. Spider venoms contain many proteins and peptides with highly specific and potent activities suitable for biomedical or agrochemical applications, but the ...
Tim Lüddecke   +3 more
wiley   +1 more source

Brown Recluse Spider, Loxosceles reclusa Gertsch and Mulaik (Arachnida: Araneae: Sicariidae)

open access: yesEDIS, 2005
The brown recluse spider, Loxosceles reclusa Gertsch & Mulaik, is frequently reported in Florida as a cause of necrotic lesions in humans. For example, in the year 2000 alone, Loft (2001) reported that the Florida Poison Control Network had recorded ...
Glavis B. Edwards, Jr.
doaj   +5 more sources

The chromosome‐scale assembly of the Canary Islands endemic spider Dysdera silvatica (Arachnida, Araneae) sheds light on the origin and genome structure of chemoreceptor gene families in chelicerates

open access: yesMolecular Ecology Resources, Volume 22, Issue 1, Page 375-390, January 2022., 2022
Abstract Here, we present the chromosome‐level genome assembly of Dysdera silvatica Schmidt, 1981, a nocturnal ground‐dwelling spider endemic from the Canary Islands. The genus Dysdera has undergone a remarkable diversification in this archipelago mostly associated with shifts in the level of trophic specialization, becoming an excellent model to study
Paula Escuer   +7 more
wiley   +1 more source

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