description Dimorphic Jumping Spider (Maevia inclemens) Overview
The Dimorphic Jumping Spider (Maevia inclemens) is a small North American spider recognized for its unique sexual dimorphism. The species is notable for having two distinct male morphs—a dark, tufted form and a lighter, gray form—that exhibit different courtship dances and physical appearances. Both morphs compete for the attention of the drabber, larger females. This rare characteristic makes them a frequent subject of study for evolutionary biologists and arachnologists researching mate selection.
help Dimorphic Jumping Spider (Maevia inclemens) FAQ
What is unusual about male Maevia inclemens?
Male Maevia inclemens occur in two distinct forms, often called the dark or tufty morph and the lighter or gray morph. The two forms use different courtship displays to attract females.
Where does the Dimorphic Jumping Spider live?
Maevia inclemens is a North American jumping spider. Like other salticids, it actively hunts rather than relying on a large prey-catching web.
How do the two male morphs court females?
The dark males have prominent tufts and perform a more conspicuous, raised-leg display. Light males are typically less tufted and use a different combination of movement and visual signaling.
Does Maevia inclemens build a web to catch prey?
No large capture web is needed for its normal hunting behavior. It is a jumping spider that locates prey visually and pounces, although it may use silk retreats for shelter.
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