Synsphyronus sertus

Synsphyronus sertus is a species of pseudoscorpion in the Garypidae family. It is endemic to Australia. It was described in 2021 by Australian arachnologists Karen Cullen and Mark Harvey. The specific epithet sertus (Latin: 'join' or 'knit') refers to the fused metatarsi and tarsi.

Description
The body lengths of males are 2.96–3.29 mm; those of females 3.34–3.73 mm. Colouration is generally reddish-brown with paired darker patches.

Distribution and habitat
The species occurs in the southern Northern Territory. The type locality is Henbury Station in the James Range of the MacDonnell Ranges bioregion, some 130 km south of Alice Springs. The pseudoscorpions were found under shaded sandstone rocks in a south-facing gully.

Behaviour
The pseudoscorpions are terrestrial predators.