Nuevos Registros de Distribución del Género<i>Latrodectus</i>Walckenaer y<i>Loxosceles</i>Heineken y Lowe en México

Salceda-Sánchez, B.; Hernández-Hernández, Vanesa; Conde-Sánchez, E.; Vargas-Olmos, M.; López-Cárdenas, J.; Huerta, Hugo Vega

doi:10.3958/059.042.0226

Cited by 5 publications

(5 citation statements)

References 2 publications

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“…Although Chamberlin & Ivie (1935) mentioned that L. hesperus is distributed as far south as Mexico, there were no records of this species in Mexico from that time. Recent faunistic inventories, however, have since reported the presence of L. hesperus in the Mexican states of Baja California Sur, Chihuahua, Coahuila and Hidalgo, in addition to additional records of L. mactans and L. geometricus from several other states (Castañeda-Gómez et al 2012;Jiménez et al 2015;Salceda-Sánchez et al 2017;Desales-Lara et al 2018;Cabrera-Espinosa 2020;Cabrera-Espinosa & Valdez-Mondragón 2021).…”

Section: Discussionmentioning

confidence: 99%

Phylogenetic analyses and description of a new species of black widow spider of the genus Latrodectus Walckenaer (Araneae, Theridiidae) from Mexico; one or more species?

Valdez-Mondragón,

Cabrera-Espinosa

2023

EJT

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A new species of the spider genus Latrodectus Walckenaer, 1805 from Mexico is described based on an integrative taxonomic approach. Latrodectus occidentalis Valdez-Mondragón sp. nov. is described using the molecular markers cytochrome c oxidase subunit 1 (CO1) and internal transcribed spacer 2 (ITS2), morphology of male and female specimens, and Species Distribution Models (SDM). Four molecular methods for species delimitation were implemented. The new species is characterized by having a unique dorsal coloration pattern on the abdomen. Latrodectus occidentalis sp. nov. is considered a distinct and valid species for four reasons: (1) it can be distinguished by morphological characters (genital and somatic); (2) the average interspecific genetic variation is > 2%; (3) 12 haplotypes were recovered within the species, being separated by the next close haplogroup of L. hesperus Chamberlin & Ivie, 1935 (30 mutations); and (4) congruence was observed among the four molecular methods. The number of recorded species of Latrodectus from Mexico increases to four: Latrodectus mactans (Fabricius, 1775), L. hesperus Chamberlin & Ivie, 1935, L. geometricus C.L. Koch, 1841 (introduced), and L. occidentalis sp. nov. The diversity of the genus Latrodectus from Mexico is surely underestimated, and more sampling is needed from the different biogeographical provinces and ecoregions to fill in these gaps.

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Section: Discussionmentioning

confidence: 99%

Phylogenetic analyses and description of a new species of black widow spider of the genus Latrodectus Walckenaer (Araneae, Theridiidae) from Mexico; one or more species?

Valdez-Mondragón,

Cabrera-Espinosa

2023

EJT

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“…En México, a finales de la década de los cincuentas la distribución geográfica de L. geometricus (viuda café) se restringía únicamente al estado de Veracruz, México (12), sin embargo, durante las últimas seis décadas ha mostrado tener gran capacidad colonizadora y flexibilidad adaptativa a diferentes altitudes y condiciones climáticas de temperatura y humedad, lo cual ha dado como resultado su presencia en diversos estados del sur, centro y norte del país, siendo pocos los estados de México donde no tiene presencia (7,8). Esta información sugiere que solo es cuestión de tiempo (años), aunque desconociendo cuántos, para estar completamente distribuida en todo el territorio mexicano.…”

Section: Discussionunclassified

“…En México, tenemos la presencia de tres especies del género Latrodectus, dos especies nativas (L. mactans y L. hesperus) y una introducida originaria de África (L. geometricus). L. mactans se encuentra registrada en los 32 estados del país, por su parte L. hesperus es de reciente registro en el estado de Baja California Sur y Coahuila (5,6), mientras que L. geometricus se limita a 24, de los cuales Baja California, Coahuila, Colima, Nuevo León, Querétaro, Tabasco, Zacatecas y Sonora son los estados que no han registrado la presencia de esta especie (7,8). Durante el periodo 2016 a 2018, Sonora fue de las principales entidades federativas con intoxicación por artrópodos ponzoñosos (arañas), excepto alacrán, con poco más de 13 mil casos y 3 defunciones (9,10), situación derivada de la amplia diversidad de arañas con importancia médica presentes en el estado como lo son L. mactans y arañas del grupo violinistas: Loxosceles alamosa, Lo.…”

Section: Introductionunclassified

Primer registro de la viuda café Latrodectus geometricus en Sonora, México

et al. 2020

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Introducción. En México, el estado de Sonora reporta una de las mayores cifras de casos de intoxicación por artrópodos ponzoñosos (arañas). Latrodectus geometricus, araña perteneciente a la familia Theridiidae, tiene la capacidad de comprometer la salud de la persona picada debido a las toxinas que posee, requiriendo de hospitalización y tratamiento específico.Objetivo. Reportar por primera ocasión la presencia de L. geometricus en Sonora, México.Material y métodos. Se obtuvieron ejemplares procedentes de Hermosillo y Baviácora, ambos municipios de Sonora, mediante colectas exploratorias intencionales no sistematizadas. La identificación taxonómica se realizó con claves taxonómicas.Resultados. Siete arañas conespecíficas a L. geometricus (Hermosillo: 3♀, 1 juvenil) (Baviácora: 2♀, 1♂).Conclusión. Se reporta por primera ocasión la presencia de L. geometricus en Hermosillo y Baviácora ambos municipios de Sonora.

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“…There are three records from Jalisco in 1997, though there are no photos and no specimens provided for any of these records (GBIF 2022). Reports to date also include the states of: Baja California, Baja California Sur, Sonora, Chihuahua, Tamaulipas, Sinaloa, Coahuila, San Luis Potosí, Durango, Chiapas, Yucata´n, Quintana Roo, Oaxaca, Guerrero, Morelos, Puebla, Guanajuato, Veracruz, Querétaro, Hidalgo, Michoaca´n, Aguascalientes, Tlaxcala, and Nuevo León (Salceda-Sa´nchez et al 2017;Castañeda-Gómez et al 2020;GBIF 2022).…”

Section: Spatiotemporal Patterns Of Brown Widow Introductionsmentioning

confidence: 99%

Patterns of the introduction, spread, and impact of the brown widow spider, Latrodectus geometricus (Araneae: Theridiidae), in the Americas

Wahlberg,

Antoniazzi,

Schalk

2023

The Journal of Arachnology

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Introductions of non-native species to novel environments happen often, but a species must overcome multiple biotic and abiotic filters to establish and eventually spread. Focusing on patterns of introductions can provide insights as to underlying mechanisms that facilitate establishment, and in turn, their potential effects on native communities. The brown widow spider, Latrodectus geometricus C. L. Koch, 1841, is likely native to Africa, but now has a cosmopolitan distribution due to introductions via international trade. We reviewed the patterns of brown widow introductions in the Americas to determine if there are any large-scale inferences regarding their patterns, and potential impacts, of their introduction. A total of 5,004 records from 30 countries were synthesized and demonstrate their spread to higher latitudes across time with the majority of those records (n ¼ 4,923; 98%) occurring in the past two decades. Brown widows are now documented in 30 of the 35 countries in North, Central, and South America, with one-third of those introductions detected in the last 30 years. Citizen-science databases (e.g., iNaturalist) have been instrumental in documenting the expansion of the brown widow, as more than 90% of the records synthesized came from these sources. Brown widows have proven to be successful invaders worldwide, and this review synthesizes expansion reports of their invasion in the Americas in hopes of spurring additional research in locations where they have become established.

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Nuevos Registros de Distribución del GéneroLatrodectusWalckenaer yLoxoscelesHeineken y Lowe en México

Cited by 5 publications

References 2 publications

Phylogenetic analyses and description of a new species of black widow spider of the genus Latrodectus Walckenaer (Araneae, Theridiidae) from Mexico; one or more species?

Phylogenetic analyses and description of a new species of black widow spider of the genus Latrodectus Walckenaer (Araneae, Theridiidae) from Mexico; one or more species?

Primer registro de la viuda café Latrodectus geometricus en Sonora, México

Patterns of the introduction, spread, and impact of the brown widow spider, Latrodectus geometricus (Araneae: Theridiidae), in the Americas

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