The guardstone spiders of the genus Phonotimpus Gertsch & Davis (Araneae: Phrurolithidae) from northeastern Mexico.

The American genus Phonotimpus Gertsch & Davis, 1940 (Araneae, Phrurolithidae) was described on the basis of two species from northern Mexico. Recently, four species were described from Central and South Mexico and one species was transferred to this genus. Here we describe the males of Phonotimpus separatus Gertsch & Davis (the type species) and P. eutypus Gertsch & Davis, both previously known only from female specimens. Moreover, we describe 25 new species from Northeast Mexico (Nuevo León, Tamaulipas, and San Luis Potosí): P. ahuacatlan sp. nov., P. arcitos sp. nov., P. boneti sp. nov., P. calenturas sp. nov., P. chipinque sp. nov., P. cielo sp. nov., P. cima sp. nov., P. cuauhtemoc sp. nov., P. cumbres sp. nov., P. elviejo sp. nov., P. escondida sp. nov., P. farias sp. nov., P. frio sp. nov., P. gertschi sp. nov., P. llera sp. nov., P. perra sp. nov., P. pozas sp. nov., P. puente sp. nov., P. revilla sp. nov., P. sanpedro sp. nov., P. vacas sp. nov., P. valles sp. nov., P. taman sp. nov., P. tetrico sp. nov. and P. xilitla sp. nov. Furthermore, we propose five species groups that include almost all of the new species and all the species described to date.

The spider genus Diguetia Simon, 1895 (Araneae: Diguetidae) in North America: a new species, redescriptions, and comments on the distribution of the genus.

A new species of the genus Diguetia Simon, 1895, D. balandra sp. nov. is described, the male of D. signata Gertsch, 1958 is described for the first time and D. dialectica Chamberlin, 1924 stat. reval. is raised to the species level and redescribed based on specimens from Baja California Sur, Mexico. Diguetia imperiosa Gertsch & Mulaik, 1940 is recorded from Baja California Sur. Furthermore, we emend the diagnosis of the genus, biogeographic comments for all North American species. In the United States, California (five species) and Arizona (four species) have more species of Diguetia while the Mexican states of Sonora (five species), Chihuahua, Baja California, Baja California Sur (four species each) and Coahuila (three species) harbor the highest diversity of diguetids. Diguetia canities (McCook, 1890) has the highest number of records (133) in North America. Mexico has a striking diversity of Diguetia with eight out of ten species currently known.

A new species of the genus Phonotimpus Gertsch amp; Davis (Araneae: Phrurolithidae) from Mexico and the transfer of Gosiphrurus schulzefenai Chamberlin amp; Ivie to Phonotimpus.

Phonotimpus padillai sp. nov. is described on the basis of morphological characteristics of both sexes: males are easily distinguished by the shape of the embolus and females by the shape of the copulatory openings. Additionally, Gosiphrurus schulzefenai Chamberlin Ivie, 1936 is transferred to the genus Phonotimpus Gertsch Davis, 1940, based on the redescription of the female and first description of the male, with an update of the diagnosis of this species.

A new species of Phonotimpus Gertsch Davis, 1940 (Araneae: Phrurolithidae) from Mexico.

The genus Phonotimpus Gertsch Davis, 1940 includes four species all known only from Mexico (World Spider Catalog 2018). P. separatus and P. eutypus were described by Gertsch Davis (1940) from San Luis Potosí and from Nuevo León, respectively. Phonotimpus pennimani and P. talquian, described by Chamé-Vázquez, Ibarra-Núñez Jiménez (2018), are the southernmost species in this genus (Chamé-Vázquez et al. 2018), and have restricted allopatric geographic distributions in Chiapas. This genus differs from other American phrurolithid genera by the following combination of characters: posterior eye row recurved, posterior median eyes closer to posterior lateral eyes than to each other, posterior median eyes smaller than posterior lateral eyes, females with dorsal scutum on the opisthosoma; palpi of males with retrolateral and dorsal tibial apophyses not joined at the base, and copulatory bulb with a conductor, embolus and embolar basal process (Gertsch Davis 1940; Penniman 1985; Chamé-Vázquez et al. 2018). In this paper, a new species of Phonotimpus is described and illustrated, based on specimens collected in soil of a pine-oak forest in the state of Mexico.

Redescription of Phonotimpus separatus Gertsch Davis, 1940 (Araneae: Phrurolithidae) and description of two new species of Phonotimpus from Mexico.

The female of Phonotimpus separatus Gertsch Davis (the type species of the genus) is redescribed from a specimen collected at the type locality, and two new species of Phonotimpus from Mexico are described: P. pennimani sp. nov. and P. talquian sp. nov. A more detailed description of P. separatus is provided to better distinguish them from related taxa. The two new species are closely related; males and females of both species share several somatic and genitalic characters not found in P. separatus. The resemblance of both new species to P. separatus is discussed.