Mermessus

Fauna Portal Genus Number: 2768

Miller (2007) diagnosed the genus Mermessus within the context of the Neotropical fauna and in and Australian context the distinction to Erigone is valid: distinguished from Erigone by the presence of a well-developed anterior radical process in Erigone, absent or very small in Mermessus; Erigone can usually be distinguished from Mermessus by the distinctive form of the palpal tibia in Erigone, by the large ventral tooth on the palpal patella in Erigone, small or absent in Mermessus, and a series of teeth around the margin of the carapace in Erigone, absent in Mermessus; [...] females are distinguished from other genera by the terminally divided ventral plate, sometimes moderately elongated beyond the epigastric furrow, along with a well-developed dorsal plate, usually visible above the ventral plate. envagination.