Posts Tagged ‘Mexico’


Systematic revision of the giant vinegaroons of the Mastigoproctus giganteus complex (Thelyphonida, Thelyphonidae) of North America. (Bulletin of the American Museum of Natural History, no. 418)

 

Abstract:

The North American vinegaroon, Mastigoproctus giganteus (Lucas, 1835), is demonstrated to comprise a complex of range-restricted species rather than a single widespread polymorphic species. Seven species are recognized based on morphological characters of the adult males, including the arrangement of spines on the prodorsal margin of the pedipalp trochanter, the position of the epistoma on the carapace, the presence of a stridulatory organ on opposing surfaces of the chelicerae and the pedipalp coxa, the presence of a patch of setae on sternite V, and the shape and macrosculpture of the retrolateral surface of the pedipalp femur. The two currently recognized subspecies are elevated to species: Mastigoproctus mexicanus (Butler, 1872), stat. nov., and Mastigoproctus scabrosus (Pocock, 1902), stat. nov. Mastigoproctus floridanus (Lönnberg, 1897) is revalidated from synonymy with M. giganteus. Redescriptions of M. giganteus and the other three species, based on both sexes, are provided, and three new species described: Mastigoproctus cinteotl, sp. nov., from Tamaulipas, Mexico; Mastigoproctus tohono, sp. nov., from Arizona and Sonora, Mexico; Mastigoproctus vandevenderi, sp. nov., from Sonora, Mexico. The present contribution raises the diversity of the Order Thelyphonida Latreille, 1804, in North America from one species to seven. Three species occur in the United States (one each in Arizona, Texas, and Florida), six species occur in Mexico, and two species occur in both countries.
See at http://digitallibrary.amnh.org/handle/2246/6840

Medical application in scorpion’s venom?A team of Mexican biotechnology researchers has identified a molecule in scorpion venom that could serve both as an aid in antibiotic delivery and as a bactericide disinfectant

Medical application in scorpion’s venom?

Abstract

Diplocentrus duende n. sp. is described based on adult males collected from a locality in the Tehuacán–Cuicatlán Valley, Mexico. This species has punctate pedipalp surfaces, a condition present only in four other species of this specious genus. As suggested here, this condition has evolved independently in these species within the “mexicanus” group of Diplocentrus from the rest of the diplocentrids

See at http://www.sciencedirect.com/science/article/pii/S163106911730063X

Scorpions are among the oldest terrestrial arthropods, which are distributed worldwide, except for Antarctica and some Pacific islands. Scorpion envenomation represents a public health problem in several parts of the world. Mexico harbors the highest diversity of scorpions in the world, including some of the world’s medically important scorpion species. The systematics and diversity of Mexican scorpion fauna has not been revised in the past decade; and due to recent and exhaustive collection efforts as part of different ongoing major revisionary systematic projects, our understanding of this diversity has changed compared with previous assessments. Given the presence of several medically important scorpion species, the study of their venom in the country is also important. In the present contribution, the diversity of scorpion species in Mexico is revised and updated based on several new systematic contributions; 281 different species are recorded. Commentaries on recent venomic, ecological and behavioral studies of Mexican scorpions are also provided. A list containing the most important peptides identified from 16 different species is included. A graphical representation of the different types of components found in these venoms is also revised. A map with hotspots showing the current knowledge on scorpion distribution and areas explored in Mexico is also provided.

 

URL at http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4728524/

 

syntropinaeAbstract:

Four distinct genera, forming two monophyletic groups, are basal in the phylogeny of the North American vaejovid scorpion subfamily Syntropinae Kraepelin, 1905: Konetontli González-Santillán and Prendini, 2013; Maaykuyak González-Santillán and Prendini, 2013; Syntropis Kraepelin, 1900; and Vizcaino González-Santillán and Prendini, 2013. All except the species of Konetontli, treated elsewhere, are revised in the present contribution. The two species of Maaykuyak, three species of Syntropis, and monotypic Vizcaino are redescribed; the adults of Syntropis williamsi Soleglad et al., 2007, described for the first time; keys to identification of the species of Maaykuyak and Syntropis presented; and new locality records and updated distribution maps provided for all species covered.
URL at http://digitallibrary.amnh.org/handle/2246/6662

 

mcwestiAbstract:
Two new species of the mexicanus group of Vaejovis C.L. Koch are described from the Madrean pine-oak forests of the Sierra Madre Occidental in the state of Durango, Mexico. These species, Vaejovis sierrae sp. nov. and Vaejovis mcwesti sp. nov., are distinguished from each other and the only other species of the mexicanus group known from this mountain range, Vaejovis montanus Graham and Bryson, by morphometrics, carinal development of the pedipalps, granulation of the metasoma, and body size. A key to the species of the mexicanus group from the Sierra Madre

Reference:
Sissom WD, Graham MR, Donaldson TG, Bryson Jr RW. Two new Vaejovis C.L. Koch 1836 from highlands of the Sierra Madre Occidental, Durango, Mexico (Scorpiones, Vaejovidae). Insecta Mundi. 2016 (0477):1-14. [Open Access]

johnny-cash-tarantula-2 (1)

Abstract

This systematic study documents the taxonomy, diversity, and distribution of the tarantula spider genusAphonopelma Pocock, 1901 within the United States. By employing phylogenomic, morphological, and geospatial data, we evaluated all 55 nominal species in the United States to examine the evolutionary history of Aphonopelma and the group’s taxonomy by implementing an integrative approach to species delimitation. Based on our analyses, we now recognize only 29 distinct species in the United States. We propose 33 new synonymies (A. apacheum, A. minchi, A. rothi, A. schmidti, A. stahnkei = A. chalcodes; A.arnoldi = A. armada; A. behlei, A. vogelae = A. marxi; A. breenei = A. anax; A. chambersi, A. clarum, A.cryptethum, A. sandersoni, A. sullivani = A. eutylenum; A. clarki, A. coloradanum, A. echinum, A. gurleyi, A.harlingenum, A. odelli, A. waconum, A. wichitanum = A. hentzi; A. heterops = A. moderatum; A. jungi, A.punzoi = A. vorhiesi; A. brunnius, A. chamberlini, A. iviei, A. lithodomum, A. smithi, A. zionis = A. iodius; A.phanum, A. reversum = A. steindachneri), 14 new species (A. atomicumsp. n., A. catalinasp. n., A.chiricahuasp. n., A. icenogleisp. n., A. johnnycashisp. n., A. maderasp. n., A. marekisp. n., A. moellendorfisp. n., A. parvumsp. n., A. peloncillosp. n., A. prenticeisp. n., A. saguarosp. n., A. superstitionensesp. n., and A. xwalxwalsp. n.), and seven nomina dubia (A. baergi, A. cratium, A. hollyi, A. mordax, A. radinum, A.rusticum, A. texense). Our proposed species tree based on Anchored Enrichment data delimits five major lineages: a monotypic group confined to California, a western group, an eastern group, a group primarily distributed in high-elevation areas, and a group that comprises several miniaturized species. Multiple species are distributed throughout two biodiversity hotspots in the United States (i.e., California Floristic Province and Madrean Pine-Oak Woodlands). Keys are provided for identification of both males and females. By conducting the most comprehensive sampling of a single theraphosid genus to date, this research significantly broadens the scope of prior molecular and morphological investigations, finally bringing a modern understanding of species delimitation in this dynamic and charismatic group of spiders.

Awesome …

URL http://zookeys.pensoft.net/articles.php?id=6264

See also the National Geographic article at http://news.nationalgeographic.com/2016/02/160204-animals-spiders-tarantulas-science-nation/

LiveScience review at http://www.livescience.com/53616-tarantula-named-for-johnny-cash.html

toxins-08-00002-ag

Abstract

Scorpions are among the oldest terrestrial arthropods, which are distributed worldwide, except for Antarctica and some Pacific islands. Scorpion envenomation represents a public health problem in several parts of the world. Mexico harbors the highest diversity of scorpions in the world, including some of the world’s medically important scorpion species. The systematics and diversity of Mexican scorpion fauna has not been revised in the past decade; and due to recent and exhaustive collection efforts as part of different ongoing major revisionary systematic projects, our understanding of this diversity has changed compared with previous assessments. Given the presence of several medically important scorpion species, the study of their venom in the country is also important. In the present contribution, the diversity of scorpion species in Mexico is revised and updated based on several new systematic contributions; 281 different species are recorded. Commentaries on recent venomic, ecological and behavioral studies of Mexican scorpions are also provided. A list containing the most important peptides identified from 16 different species is included. A graphical representation of the different types of components found in these venoms is also revised. A map with hotspots showing the current knowledge on scorpion distribution and areas explored in Mexico is also provided.

See here at http://www.mdpi.com/2072-6651/8/1/2

 

ABSTRACT

The Mexican vaejovid scorpion genus Konentontli González-Santillán and Prendini, 2013, was created to accommodate five species united, among other characters, by a subaculear tubercle on the telson. Species of Konetontli are among the smallest vaejovid scorpions. Their very small size, cryptic coloration, and apparently seasonal surface activity may explain their rarity in collections and it is likely that more undescribed species await discovery. In the present contribution, we describe four new species (Konetontli ignes, sp. nov.; Konetontli ilitchi, sp. nov.; Konetontli juxtlahuaca, sp. nov.; Konetontli migrus, sp. nov.) and revalidate Konetontli zihuatanejensis (Baldazo-Monsivaiz, 2003), comb. nov., previously synonymized with Konetontli acapulco (Armas and Martín-Frías, 2001), raising to 10 the number of species in the genus; redescribe previously described species, including the first description of the female of Konetontli nayarit (Armas and Martín-Frías, 2001); and present new records, comprehensive distribution maps, and a key to the identification of the species.

AUTHORS

Edmundo González-Santillán

City University of New York; Scorpion Systematics Research Group, Division of Invertebrate Zoology, American Museum of Natural History; Laboratorio Nacional de Genómica para la Biodiversidad, Centro de Investigación y de Estudios Avanzados del IPN, Irapuato, Guanajuato, Mexico; Facultad de Ciencias, Departamento de Biología Comparada, Universidad Nacional Autonóma de México, Mexico City

Lorenzo Prendini

Scorpion Systematics Research Group, Division of Invertebrate Zoology, American Museum of Natural History

LINK

http://www.bioone.org/doi/abs/10.1206/907.1

Abstract

A new species of Vaejovis is described from the Mexican state of Aguascalientes. It is assigned to the “mexicanus” group and compared with similar species from Jalisco, Guanajuato, and San Luis Potosí. A map with their known distributions is provided.

Authors

GERARDO A. CONTRERAS-FÉLIX, OSCAR F. FRANCKE, ROBERT JR. W. BRYSON

Link

http://biotaxa.org/Zootaxa/article/view/zootaxa.3936.1.8