Emertonius koomeni, Prószyński, 2018

Prószyński, Jerzy, 2018, Review of genera Evarcha and Nigorella, with comments on Emertonius, Padilothorax, Stagetillus, and description of five new genera and two new species (Araneae: Salticidae) *, Ecologica Montenegrina 16, pp. 130-179 : 167

Emertonius koomeni sp. n.

Figures 26 A-H

Material. Holotype female " Myrmarachne exasperans . Borneo: Sabah: Tenom, Rafflesia Garden at Perkasa Hotel, (966). leg. & det., coll. P. Koomen ". Kept in the private collection of Dr P. Koomen in Leeuwarden, the Netherlands. Description based on photographs by © P. Koomen ( Figs 26 A-H).

Diagnosis. Key characters are shown on Fig. 26 A-H, habitus very closely resembling E. emertonius , but is sufficiently distinct. Male unknown.

Description. Strikingly similar to male of E. exasperans by body shape and general type of color pattern, from which differs sufficiently by absence of yellow narrow medial streak along eyefield and thorax, replaced on posterior half of eyefield by triangular spot of white setae (which could possibly be invisible on specimens submerged in alcohol). Cephalic part looks square and is broader than thorax, its of blackish brown color is expanded also over the sides, Medial belt of thorax is brownish yellow with reddish hue. Abdomen dorsally with two (instead of three) white "petals-like" spots, medial belt of abdomen blackish with brown hue, terminal whitish yellow area shorter than in E. exasperans . Epigyne ( Fig. 22 G-H) differs distinctly by proportions - posterior half of spermathecae very thin and long, with large structures at the junction with (invisible) membranous ducts, terminal anterior chambers of spermathecae regularly round, proportionately much smaller than in E. exasperans .

Distribution: Borneo: Sarawak - only single female is known.

Figures

Figure 22-I. For figure caption see under Figure 22-II.

Figure 26-I. For figure caption see under Figure 26-II.