A new species of the spider genus Ochyrocera Simon (Araneae, Ochyroceratidae) from Mexico, with biogeographical comments and an updated identification key for Mexican species Author Valdez-Mondragón, Alejandro 0000-0001-5385-3195 Collection of Arachnology (CARCIB), CIBNOR, S. C. Programa Académico de Planeación Ambiental y Conservación (PLAYCO), Centro de Investigaciones Biológicas del Noroeste (CIBNOR). Km. 1 Carretera a San Juan de La Costa “ El Comitán ”, La Paz, Baja California Sur, Mexico, C. P. 23205. & lat _ mactans @ yahoo. com. mx; https: // orcid. org / 0000 - 0001 - 5385 - 3195 lat_mactans@yahoo.com.mx Author Chamé-Vázquez, David 0000-0003-3433-153X Collection of Arachnology (CARCIB), CIBNOR, S. C. Programa Académico de Planeación Ambiental y Conservación (PLAYCO), Centro de Investigaciones Biológicas del Noroeste (CIBNOR). Km. 1 Carretera a San Juan de La Costa “ El Comitán ”, La Paz, Baja California Sur, Mexico, C. P. 23205. & chamevazquez @ gmail. com; https: // orcid. org / 0000 - 0003 - 3433 - 153 X chamevazquez@gmail.com text Zootaxa 2023 2023-11-20 5374 4 552 562 https://mapress.com/zt/article/download/zootaxa.5374.4.6/52306 journal article 10.11646/zootaxa.5374.4.6 1175-5326 10158907 8DFA6D9F-A04D-409A-BEAD-8D152B0ADDE6 Key to males of Ochyrocera species from Mexico , updated from Valdez-Mondragón (2017) : 1. Palpal bulb (tegulum) rounded, massive in comparison with the cymbium length ( Gertsch 1977 : figs 80–81).................................................................................. Ochyrocera machadoi ( Gertsch, 1977 ) - Palpal bulb otherwise.................................................................................. 2 2. Cymbial apophysis conical and relatively long ( Figs 7, 8 )..................................................... 3 - Cymbial apophysis short and stout ( Valdez-Mondragón 2009 : figs 3, 4)..... Ochyrocera juquila Valdez-Mondragón 2009 3. Cymbial apophysis thickened medially (arrow in Valdez-Mondragón 2017 : fig. 16)................................. 4 - Cymbial apophysis conical, not thickened medially ( Valdez-Mondragón 2017 : figs 4–6)............................. 5 4. Embolus slender and long, about the same length of cymbium......... Ochyrocera simoni O.P. Pickard-Cambridge 1894 - Embolus wide and relatively short, markedly shorter than cymbial length ( Valdez-Mondragón 2017 : fig. 15).............................................................................. Ochyrocera pojoj Valdez-Mondragón, 2017 5. Base of embolus with a brownish sclerotized region (arrows in Valdez-Mondragón 2017 : figs 4, 6; Figs 8, 12 )............ 6 - Base of embolus without a brownish sclerotized region....................................................... 7 6. Sclerotized region surrounding the base of embolus (arrows in Valdez-Mondragón 2017 : figs 4, 6); palpal femora relatively short, about two times longer than wide.............................. Ochyrocera jarocha Valdez-Mondragón, 2017 - Sclerotized region not surrounding the base of embolus, restricted to subdorsal part of the base of embolus ( Figs 8, 12 ); palpal femora relatively long, about three times longer than wide........................... Ochyrocera marialuisae sp. nov. 7. Embolus slender and long, D-shaped, directed toward the distal part of the tibia ( Valdez-Mondragón 2009 : figs 13, 14)................................................................... Ochyrocera chiapas Valdez-Mondragón 2009 - Embolus stout and short, V-shaped, directed toward the central region of cymbial apophysis ( Brignoli 1974 : fig. 6B)................................................................................. Ochyrocera fagei Brignoli 1974