Myrmarachne salaputium Yamasaki, 2018

Yamasaki, Takeshi, Hashimoto, Yoshiaki, Endo, Tomoji, Hyodo, Fujio, Itioka, Takao & Meleng, Paulus, 2018, New species of the ant-mimicking genus Myrmarachne MacLeay, 1839 (Araneae: Salticidae) from Sarawak, Borneo, Zootaxa 4521 (3), pp. 335-356 : 348

Myrmarachne salaputium Yamasaki sp. nov.

( Figs 43–49 )

Type material. Holotype: male ( FRCS; LMy20070822_O1), Lambir Hills National Park , Sarawak, Borneo, 22.VIII.2007, E. Oie leg.

Etymology. The specific name is a Latin noun in apposition, meaning a tiny man and manikin, referring to the small body size.

Diagnosis. Male is distinguishable from other species by small-sized body (less than 5 mm) and short cheliceral paturon. Myrmarachne salaputium sp. nov. is similar to M. pumilio ( Karsch, 1880), M. spissa ( Peckham & Peckham, 1892) and M. amabilis sp. nov., but clearly distinguishable from these three species by shape of cheliceral paturon in male: cheliceral paturon short, and in dorsal view, inner and outer dorsal margins almost parallel in M. salaputium sp. nov., but cheliceral paturon long, anteriorly swollen in M. amabilis , M. pumilio and M. spissa (cf. Benjamin 2015).

Male ( Figs 43–46 ). Carapace incised behind PLE, forming margin between cephalic and thoracic parts. Cheliceral paturon much shorter than carapace, with three prolateral and five small retrolateral teeth on fang furrow; inner and outer dorsal margins almost parallel. Fang almost straight, without tooth-like apophysis. Pedicel very short. Abdomen oval, weakly constricted anteriorly; entire dorsum with scutum.

Male palp ( Figs 47–49 ). Cymbium broad, without distinct apical macrosetae. Embolus coils circular, wider than cymbium. Tegulum round; spermophore curving at anterior part of tegulum, running along posterior margin of tegulum. RTA simple, without apical hook.

Leg macrosetae. Patella I pv 0, rv1; tibia I pv 3, rv 3; metatarsus I pv 2, rv 2; tibia II rv 2. Other segments lost.

Coloration and setation ( Figs 43–45 ). Carapace brown; cephalic part darker than thoracic part. Chelicera light brown. Labium dark brown. Endite brownish-yellowish cream, weakly tinged with gray. Sternum brown. Abdomen sparsely covered with fine setae; dorsum brown, with pair of tufts of white setae anteriorly, and entirely covered with scutum; venter brown to dark brown, tinged with gray.

Measurements (1 male). Total length 2.2. Carapace length 1.12, width 0.76. Length of cheliceral paturon of male 0.75. Width of eye row I 0.70; II 0.65; III 0.79. ALE–PLE 0.57; ALE–PME 0.25. Eye size: AME 0.24; ALE 0.11; PME 0.04; PLE 0.13. Pedicel length 0.13. Abdomen length 1.05.

Female. Unknown.

Figures

FIGURES 43–49. Myrmarachne salaputium sp. nov., holotype male (LMy20070822_O1). 43 dorsal view; 44 ventral view; 45 lateral view; 46 cheliceral paturons, ventral view; 47 right palp, ventral view; 48 retrolateral view; 49 right palpal tibia, dorsal view. Scales: 43–45: 1 mm; 46–49: 0.25 mm.