Figure 4 in Redescription of the hermit crab Diogenes pugilator (Decapoda: Anomura) reveals the existence of a species complex in the Atlanto-Mediterranean transition zone, resulting in the resurrection of D. curvimanus and the description of a new species

Figure 4. Diogenes armatus sp. nov. ♂ 3.4 mm, Torregorda, Cádiz, Spain, holotype, (MNHN-IU-2019-3213): A, male left cheliped, outer aspect (arrow indicating bispinose protuberance); B, left cheliped, dorsal aspect; C, left cheliped inner surface; D, left cheliped dactylus, dorsal aspect; F, left pereiopod 4, outer aspect; G, left cheliped merus, mesial view (setae omitted). Diogenes armatus sp. nov. ♀ 3.8 mm, Isla Canela, Huelva, Spain, allotype, (MNHN-IU-2014-5736): E, female left cheliped, outer aspect. (Scales: A, C, G = 2 mm; B, D, E = 1 mm; F = 0.5 mm).