Bioacoustics of Erigomicronus

Diagnosis. Very small (1.10–1.35) pale colored spiders. Males are diagnosed by the following combination of the characters: strongly modified paracymbium, devoid pockets and carrying several untypical outgrowths (see Figs 1, 5 ; Marusik et al. 2016 : figs 14, 15); presence of a special ventral outgrowth on the distal suprategular apophysis, which performs the role of a column, designated herewith as a column-like process; and a very complicated embolic division, notably, large and highly modified radix, whip-shaped embolus and presence of a highly developed convector ( Figs 3, 4 ). Females are diagnosed by the presence of a scape-like projection in the epigynum, which devoid the copulatory ducts (or entrance grooves). N.B. The generic diagnosis and description are mainly based on the conformation of the secondary genitalia of O. longembolus , so as to avoid damage to the type specimens of Maro lautus Saito, 1984 loaned from NSMT. The structure of the embolic division in Erigomicronus new genus resembles that of the erigonine genus Houshenzinus Tanasevitch, 2006 , whose members are also characterized by a highly developed convector, the sclerite that protects and supports the whip-shaped embolus (please refer to figures where these structures can be seen) (see Tanasevitch 2006 : figs 45, 46; Zhao & Li 2014 : fig. 45B). The new genus differs from Houshenzinus by the absence of a trichobothrium on metatarsi IV, by the strongly modified paracymbium, which devoid pockets and carrying several untypical outgrowths, by the presence the column-like process on the distal suprategular apophysis, as well as by the presence of the scape-like projection in the epigynum and by the straight copulatory ducts ( vs . helical) (cp. Figs 6, 8 and Song & Li 2008 : fig. 27; Zhao & Li 2014 : fig. 46C).