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

Published as part of Valdez-Mondragón, Alejandro & Chamé-Vázquez, David, 2023, A new species of the spider genus Ochyrocera Simon (Araneae, Ochyroceratidae) from Mexico, with biogeographical comments and an updated identification key for Mexican species, pp. 552-562 in Zootaxa 5374 (4) on page 559, DOI: 10.11646/zootaxa.5374.4.6, http://zenodo.org/record/10158907