Vaejovis mexicanus, C.L.Koch, 1836

Azzinnari, Jessica S., Bryson Jr, Robert W., Graham, Matthew R., Solís-Rojas, Carlos & Sissom, W. David, 2021, A new Vaejovis C. L. Koch from the Sierra Madre Occidental of Durango, Mexico (Scorpiones: Vaejovidae), Insecta Mundi 2021 (852), pp. 1-12 : 11

Key to the Species of the Vaejovis mexicanus group from the Sierra Madre Occidental

1. Dorsal marginal, digital, dorsal secondary, ventroexternal, and dorsointernal carinae of pedipalp chelae well developed, granular to granulose................. V. montanus Graham and Bryson, 2010

— Pedipalp chela with carinae poorly developed with weaker granulation........................... 2

2(1). Weak basal tubercle on pedipalp patella; dorsolateral carinae of metasomal segments I–IV 0:0:0:1....................................... V. sierrae Sissom, Graham, Donaldson, and Bryson, 2016

— Strong basal tubercle on pedipalp patella; dorsolateral carinae of metasoma segments I–IV 0:0:1:1... 3

3(2). Pedipalp more robust, with chela length/width ratio 3.16 in known male, 3.25–3.42 in known females; granules of internal face of pedipalp femur numbering around 8; dorsolateral carinae on metasoma V serrate anteriorly; four or more setae on the ventral submedian carinae of metasoma IV......................................... V. mcwesti Sissom, Graham, Donaldson, and Bryson, 2016

— Pedipalp more slender, chela length/width ratio 3.26–3.79 in males and 3.52–3.86 in females; granules of internal face of pedipalp femur numbering around 20; dorsolateral carinae on metasoma V granular throughout; three, rarely four, setae on the ventral submedian carinae of metsoma IV............................ V. baggins Azzinnari, Bryson, Graham, Sol í s-Rojas, and Sissom, new species.