Maratus hesperus

Taxonomy and Etymology

''Maratus hesperus'' was formally described by Jürgen C. Otto and David Hill in 2017. The genus name ''Maratus'' derives from the Latin word meaning 'decorated' or 'ornamented', referring to the striking colours of the males. The specific epithet ''hesperus'' is Latin for 'western' or 'evening star', likely alluding to its distribution in western Australia or perhaps a specific characteristic observed at its discovery.

Description

• Size: Like most peacock spiders, ''M. hesperus'' is tiny, typically measuring only a few millimetres in body length (males usually 3-5 mm).
• Male: The male of ''Maratus hesperus'' is characterized by a strikingly patterned opisthosoma (abdomen) which it elevates and expands during courtship. The dorsal surface features a shield-like flap structure often adorned with iridescent blues, greens, and sometimes reds, contrasting with dark bands or spots. Specialized third legs, often fringed or flattened, are also used in their display. The cephalothorax (head and thorax) typically has a metallic sheen.
• Female: Females are generally larger than males but lack the bright coloration and elaborate abdominal flaps. Their camouflage patterns of greys, browns, and creams help them blend into their environment, a common trait among female peacock spiders.

Distribution and Habitat

''Maratus hesperus'' is found in Western Australia, particularly in temperate bushland and heathland environments. They are ground-dwelling spiders, often found among leaf litter, low-lying vegetation, or on sandy substrates where they can stalk their prey.

Behavior and Ecology

• Courtship Display: The most remarkable aspect of ''M. hesperus'' is the male's complex courtship ritual. Upon encountering a female, the male initiates a series of vibratory signals and intricate movements. He raises and spreads his colourful abdominal flaps, often waving his highly modified third pair of legs in rhythmic patterns. These displays are crucial for attracting a mate and distinguishing himself from other males. A successful display may lead to copulation, while an unimpressed or aggressive female may refuse or even attempt to prey on the male.
• Diet: Like all jumping spiders, ''Maratus hesperus'' are predatory. They are active hunters with excellent vision, using their large anterior eyes to spot and stalk small insects and other invertebrates, which they ambush with a rapid pounce.
• Reproduction: After a successful courtship and mating, the female will lay an egg sac, typically containing a small number of eggs, which she protects until the spiderlings hatch.

Conservation Status

Like many invertebrate species, the specific conservation status of ''Maratus hesperus'' has not been formally assessed by bodies like the IUCN. However, they generally face threats common to many species, including habitat loss and fragmentation.