Megacormus, Karsch, 1881

Kovařík, František, 2019, Review of Megacormus Karsch, 1881, with description of a new species (Scorpiones: Euscorpiidae), Euscorpius 296, pp. 1-46 : 12

Key to species of Megacormus

1. In contrast to females, males have fingers of pedipalps strongly flexed ( Figs. 38–43). ......................................... 2

– Both males and females have the fingers straight, without any flexure ( Figs. 44–48). ............................................... 4

2. Pectines with marginal and median lamellae fused, sulcus indistinguishable in females and vestigial in males ........... ............................................. M. granosus (Gervais, 1843)

– Pectines with marginal and median lamellae completely separated by a deep sulcus in both sexes. ....................... 3

3. Telson wider than metasoma V. .. M. grubbsi Sissom, 1994

– Metasoma V wider than telson. .......................................... ............................................ M. gertschi DÍaz NÁjera, 1966

4. Metasoma V wider than telson. .......................................... ............................................ M. segmentatus Pocock, 1900

– Telson wider than metasoma V. ....................................... 5

5. Metasoma narrow. Metasoma V length/width ratio, 2.60– 2.80 in males. ....................................... M. franckei sp. n.

– Metasoma V length/width ratio, 1.94–2.13 in males. ........ ........................... M. xichu GonzÁlez-SantillÁn et al., 2017