Pycnoscelus surinamensis (Linnaeus, 1758), Surinam Cockroach, is considered introduced to the Western Hemisphere, where it is a species of commercial and veterinary importance. In Mexico, P. surinamensis has been recorded from 17 states, and we newly report it in the states of Campeche, Michoacán, Puebla, and Querétaro, as well as the Ciudad de México, based on the examination of 184 specimens deposited in scientific collections. We also report it from the states of Aguascalientes, Baja California, Chihuahua, Estado de México, Guanajuato, Hidalgo, Sonora, and Tabasco based on our review of 952 photographic records from the citizen‑science platform iNaturalist.

The shield mantis Choeradodis rhombicollis (Latreille, 1833) is a neotropical species that had been recorded for Mexico in the states of Chiapas and Oaxaca. This work report for the first time its presence for the state of Veracruz via the examination of specimens deposited in scientific collections, as well as the revision of records present on the citizen science platform iNaturalist. The new records for Veracruz correspond to the northernmost distribution for the species, genus, and subfamily in America.

Se presentan nuevos registros de dos especies de babosas veronicélidas (Gastropoda: Veronicellidae) para Nuevo León, México: la babosa de terciopelo negro Belocaulus angustipes (Heynemann, 1885) y la babosa frijol Sarasinula plebeia (Fischer, 1868). Se actualiza el listado de babosas veronicélidas registradas para Norteamérica continental.

An updated checklist of leeches and oligochaetes (Annelida: Clitellata) that parasitize or prey upon wild North American amphibians and reptiles is presented: A total of 25 species grouped in 6 genera, 5 families, and 2 orders, are registered; these infect a total of 39 species of reptiles and 39 species of amphibians in the region. An illustrated identification key for the families and genera listed is proposed. Finally, a new record is made for Mexico: the leech Placobdella parasitica (Say, 1824) (Glossiphoniidae) parasitizing the Mesoamerican slider Trachemys venusta (Gray, 1856) (Emydidae) in the state of Tamaulipas.

An updated checklist of adult tapeworms (Platyhelminthes: Cestoda) that parasitize wild North American amphibians and reptiles is presented: A total of 58 species grouped in 15 genera, 5 families, and 3 orders, are registered; these infect a total of 90 species of reptiles and 88 species of amphibians in the region. An illustrated identification key for the families and genera listed is proposed.

The humped spider Zosis geniculata (Olivier, 1789) is a tropicopolitan spider of the venomless family Uloboridae (Araneae). This species has been recorded for Mexico without a specific locality or state being mentioned, hereby being recorded for the states of Chiapas, Coahuila, Jalisco, Nuevo León, Tamaulipas and Yucatán either via the study of vouchered specimens, the revision of photographic records from the citizen science platform iNaturalist or digital records of scientific collections. A brief diagnosis is provided for the family and the species.

An illustrated identification key to the North American termite families and genera based mainly on the soldier caste is proposed. A checklist of termites (Insecta: Blattodea: Isoptera) of Canada, continental USA and Mexico is presented, listing 89 species (and two subspecies) grouped in 26 genera and four families. Five species are added to the Mexican termite fauna, these records are for the states of Campeche: Cryptotermes cavifrons; Quintana Roo: Cryptotermes cavifrons, Neotermes holmgreni, Neotermes phragmosus, Neotermes mona; Sonora: Incisitermes banksi; and Yucatan: Neotermes phragmosus. Other 32 new state records are made for the states of Aguascalientes, Baja California Sur, Campeche, Chiapas, Jalisco, Nuevo Leon, Oaxaca, Quintana Roo, Sonora, and Yucatan. The species Coptotermes crassus, Coptotermes havilandi, Incisitermes perparvus, Microcerotermes strunckii, Nasutitermes costalis, Incisitermes nigritus and Termes melindae are eliminated from the termite fauna of this region.

The striped earwig Labidura riparia (Pallas, 1773) is a cosmopolitan species and the sole representative of the family Labiduridae in North America. In Mexico, this species has been previously mentioned for the states of Baja California, Oaxaca, Sonora, Tamaulipas, and Veracruz. In this contribution, it is reported for the first time for the states of Baja California Sur, Colima, Durango, Guerrero, Jalisco, Michoacán, Morelos, Nuevo León, Puebla, Quintana Roo, Sinaloa, and Yucatán, via the examination of vouchered specimens deposited in scientific collections. Additionally, records from the citizen science platform iNaturalist were consulted, confirming the presence of this species in the states of Aguascalientes, Chihuahua, Ciudad de México, Coahuila, Guanajuato, Hidalgo, Nayarit, Querétaro, San Luis Potosí, Tabasco, and Zacatecas. A brief diagnosis is provided for the family, genus, and species.

New state records of species of the flat-backed millipede family Paradoxosomatidae (Diplopoda: Polydesmida) are made for Mexico: Akamptogonus novarae (Humbert and Saussure, 1869) is recorded for the state of Nuevo Leon; Asiomorpha coarctata (Saussure, 1860) is recorded for the states of Estado de Mexico, Nuevo Leon, Tamaulipas and Oaxaca; Chondromorpha xanthotricha (Attems, 1898) is recorded for the states of Chiapas, Hidalgo, Nuevo Leon, Tamaulipas and Yucatan; and Oxidus gracilis (C.L. Koch, 1847) is recorded for the states of Coahuila and Tamaulipas. We also present two new cases of predation on Oxidus gracilis from a railroad worm (Coleoptera: Phengodidae) larva and a vinegaroon (Thelyphonida: Thelyphonidae).

The winged stick insect Metriophasma iphicles (Redtenbacher, 1906) (Phasmatodea: Pseudophasmatidae) is recorded for the first time from Mexico (state of Veracruz), making this the northernmost record of both the species and genus. A checklist of species in the family Pseudophasmatidae from Mexico and the USA is presented, and a key to the species listed is proposed. With the current record, the number of continental North American species of Phasmatodea increases to 108, and the number of genera in the region increases to 23.

An updated checklist of tongue worms (Pentastomida) which parasitize wild North American amphibians and reptiles is presented: a total of 14 species grouped in 6 genera, 4 families, and 2 orders are registered; these infect a total of 58 species of reptiles and 3 amphibians in the region. An illustrated identification key for the taxa listed is proposed. Kiricephalus coarctatus (Diesing, 1860) (Porocephalidae) is recorded for the first time in the snakes Arizona elegans Kennicott, 1859 (Colubridae); Micrurus tener Baird and Girard, 1853 (Elapidae); and Bothrops asper (Garman, 1884) (Viperidae); the exotic Raillietiella taegueselfiRiley, McAllister, and Freed, 1988 (Raillietiellidae) is recorded in the exotic lizard Hemidactylus frenatus Duméril and Bibron, 1836 (Gekkonidae) for the first time, and in Hemidactylus turcicus (Linnaeus, 1758) (Gekkonidae) for the first time in Mexico, this is also the first time it is recorded in a species of lizard native of the Americas, Sceloporus cyanogenys Cope, 1885 (Phrynosomatidae), this latter record represents a parasite spillover event; finally, Porocephalus stilesiSambon, 1910 (Porocephalidae) is formally recorded for the first time in Mexico in the snake Bothrops asper.

The woodlouse spider Dysdera crocata C. L. Koch, native to the Old World, is recorded for the Mexican state of Nuevo León via the revision of vouchered specimens; it is also recorded for the states of Baja California, Guanajuato, Hidalgo, San Luis Potosí, and Zacatecas via the revision of photographic records from the citizen science platform iNaturalist; these represent the first records of the species for said states. A brief diagnosis is provided for the family and the species.

The Old World ant cricket Myrmecophilus americanus Saussure, 1877 is reported for the first time from Nuevo Leon state, Mexico. The crickets were found living with their obligate host, the Old World ant, Paratrechina longicornis (Latreille. 1802). The list of known ant hosts of native New World Myrmecophilus species is updated.

A synopsis of the cockroach family Corydiidae in North America (Canada, Mexico and the USA) is made. The diversity of this family in the region comprises 65 species grouped in eight genera and three subfamilies. Through the revision of type material, Myrmecoblatta hebardi Estrada-Álvarez & Guadarrama, 2013 is transferred to the genus Paralatindia Saussure, 1868; Latindia mexicana Saussure, 1868 is retransferred to the genus Compsodes Hebard, 1917; and Homoeogamia brasiliana (Saussure, 1864) is revealed to be a junior synonym of the Old World species Polyphaga aegyptiaca (Linnaeus, 1758). A checklist of the species for the region is presented, and a key to the subfamilies and genera is proposed.

Este artículo compila información sobre diferentes aspectos de la biología de la cascabel diamantada occidental (Crotalus atrox), un crótalo norteamericano que puede encontrarse en EE. UU. y México. Específicamente, este artículo trata sobre su descripción morfológica, historia taxonómica, hábitat, comportamiento, dieta, reproducción, veneno y conservación.

We present new records of the invasive hammerhead flatworms Bipalium kewense Moseley, 1878 and Bipalium vagum Jones & Sterrer, 2005 (Platyhelminthes, Geoplanidae, Bipaliinae) from several states in Mexico based on iNaturalist and two vouchered specimens. This represents for Mexico the first review of distribution records of this group and highlights the importance of citizen science in monitoring the distribution of these ecologically important invasive predators. Methods for the collection and preservation of hammerhead flatworms, as well as an identification key, are proposed.

All the material revised is deposited in the Coleccion Aracnologica of the Facultad de Ciencias Biologicas of the Universidad Autonoma de Nuevo Leon. The prefix of all the samples analyzed is “FCB-AMYGA”; this is the code used in the collection to label all mygalomorph spider samples excluding those in the family Theraphosidae. The samples were analyzed using an AmScope SM-1TSZ stereomicroscope and photographed using an AmScope MU1603 microscope digital camera. All measurements are given in mm. The map in Fig. 4 was created with http:simplemappr.net. The ribs of the disc of the opisthosoma were counted following the method described by Gertsch & Platnick [1975] and Schwendinger [2005].

Se presentan nuevos registros de tres especies de cucarachas (Insecta: Blattodea: Blattidae) exóticas para los estados mexicanos de Nuevo León y Tamaulipas.

espanolSe describe un evento en el que la babosa frijol Sasasinula plebeia (Fischer, 1868), una especie exotica en Mexico, fue depredada por el vinagrillo Mastigoproctus cinteotl Barrales-Alcala, Francke & Prendini, 2018. Este constituye el primer registro de una presa en el medio silvestre para este vinagrillo y el primer reporte de S. plebeia para el estado de Tamaulipas. Se compila, ademas, informacion sobre la dieta en el medio silvestre de otras especies de vinagrillos americanos. EnglishAn event is described where the bean slug Sarasinula plebeia (Fischer, 1868), an exotic species in Mexico, was preyed upon by the vinegaroon Mastigoproctus cinteotl Barrales-Alcala, Francke & Prendini, 2018. This constitutes the first record of predation in the wild by this vinegaroon and the first record of S. plebeia for the state of Tamaulipas. Information regarding the prey in the wild of other species of American vinegaroons is also compiled