A new species of the mygalomorph spider genus Euagrus Ausserer (Araneae: Euagridae) from central Mexico and new records of E. gus Coyle from Tlaxcala

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  A new species of the mygalomorph spider genus Euagrus Ausserer (Araneae: Euagridae) from central Mexico and new records of E. gus Coyle from Tlaxcala Abstract  A new species of the spider genus Euagrus Ausserer, 1875 from temperate pine-oak forests in the states of Tlaxcala and Hidalgo, Mexico is described: E. pulque sp. nov. The description of the new species is based on male and female adult specimens. Additionally, Euagrus gus Coyle, 1988 is recorded for the very first time in the state of Tlaxcala. These species have sympatric distributions in La Malinche National Park, Tlaxcala. With this description, the diversity of the genus increases to 23 species, with Mexico harboring the highest diversity with 17 described species.  Valdez-Mondragón, A., Salinas-Velasco, H. V. & Bueno-Villegas, J. (2026). A new species of the mygalomorph spider genus Euagrus Ausserer (Araneae: Euagridae) from central Mexico and new records of E. gus Coyle from Tlaxcala. Zootaxa 5810 (...

Phylogeny of the high-altitude tarantulas Hapalotremus Simon, 1903 (Araneae: Mygalomorphae: Theraphosidae) with the description of a new species

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Phylogeny of the high-altitude tarantulas Hapalotremus Simon, 1903 (Araneae: Mygalomorphae: Theraphosidae) with the description of a new species

Abstract

A cladistics analysis of the high-altitude tarantulas of the genus Hapalotremus was carried out for the first time with a matrix of 21 taxa and 69 morphological characters using both equal and implied weights. Two consistent topologies were obtained with a concavity = 10.541, resulting from a sensitivity analysis. Both cladograms suggest Hapalotremus as monophyletic. Hapalotremus synapomorphies are females with spermathecae consisting in a single oval receptacle and tibia of the first pair of legs of males very short. Hapalotremus is composed of 15 species including a new species: Hapalotremus munaycha sp. nov. This new species was found to be the sister species of H. vilcanota and is distributed in central Peru at elevations about 4000 m.a.s.l. on interandean valleys. The new species distinguishes from the other known species of the genus by the intense white color on legs, carapace and cheliceae, together with a male palpal bulb carrying a slightly developed prolateral superior keel and the subapical keel ending with two very small teeth. Also, females of Hapalotremus munaycha sp. nov. are characterized by the spermathecae with very wide basal portion and small apical projections pointing upwards.

Ferretti, N., Chaparro, J. C., Ochoa, J. A. & West, R. (2024). Phylogeny of the high-altitude tarantulas Hapalotremus Simon, 1903 (Araneae: Mygalomorphae: Theraphosidae) with the description of a new species. Insect Systematics & Evolution: early view. [will be included when the version with the final pagination is issued] doi:10.1163/1876312x-bja10068