Monograph of the Salticidae (Araneae) of the World 1995-2015. Introduction to alternative classification of Salticidae
Classification of the Salticidae genera of the World
group of genera
MYRMARACHNINES
by Jerzy Prószyński
Version December 31st, 2015
Note on illustrations. This introduction to classification of Salticidae includes only species defined by diagnostic illustrations in the taxonomic literature, arranged by similarities of embolus and spermophor. Images are displayed as thumbnails to save space and allow for rapid scanning of theoretically closely-related species. Thumbnails are small versions of illustrations in other parts of the monograph, whera are displayed together with particulars of their sources and permissions.

Gen. Bocus Peckham & Peckham, 1892 (3 species)

Type species Bocus excelsus Peckham & Peckham, 1892 from Philippines.
DIAGNOSIS. Correspond with general characteristics of MYRMARACHNINES, which includes exceptional "pipes-like" sclerotized spermathecae, stretching parallel along median axis of epigyne. Copulatory ducts, invisible without staining, make large membranous coils, running from copulatory openings near median septum of epigyne [there is no sufficiently detailed drawing in this genus], towards posterior end of spermathecae, near posterior rim of epigyne. Males have oval, or almost circular bulbus, encircled with coils of embolus inside semitranslucent sheath. Spermophor broad, runs along margin of bulbus, making additional loop, small and thin, before entering embolus. Tibial apophysis (RTA) short, twisted corkscrew-like, or straight. Male chelicerae usually disproportionately long, with row of tiny individual teeth along internal posterior edge, fang is very long. For details see drawings (below).
More detailed features include very thin spermathecal "pipes" with relatively large, spherical anterior compartment, loops of copulatory ducts are relatively short (Fig. 89). Body with broad and deep carapace constriction (Figs 94-95), anterior sternum with expanded intercostal plate between coxa I and II (Fig. 96). In males pedipalpal tibia is narrower than cymbium, tibial apophysis is gently bent , spermophor follows margin of bulbus, without making additional small coil (Figs 91-93).
DESCRIPTION. Males resembles large and robust Myrmarachne, said to reach even 1.5 cm long, differs strikingly by carapace long, with both cephalic and thoracal parts relatively high, separated by deep and broad constriction (Figs 94-95). Striking difference is broad intercostal plate in anterior sternum, between coxae I and II, remaining sternum narrow, ends between coxa II and stretches by narrow extension to coxae IV (Fig. 96). Pedicel moderately long. Abdomen oval with constriction, the latter limited anteriorly by almost vertical anterior sclerite. Palps with tibia narrower than cymbium, tibial apophysis gently bent, but not twisted into hook, spermophor around margin of bulbus, without making additional small coil (Figs 91-93). Epigyne is shown on Fig. 90. Data on internal structure of epigyne (Fig. 89) confusing and uncertain. Drawings below are integral part of the definition.
REMARKS. Genus revised by Wanless [1978b] but still poorly known, with insufficient documentation of epigyne and palps. Male Bocus angusticollis Deeleman-Reinhold, Floren, 2003 may well be classified as a Bocus, but epigyne of female demonstrate typical Myrmarachne spermathecae.
REFERENCES. Wanless F.R. 1978b. Vol. 33. N. 4. P. 239-244. Simon E. 1901-1903. P. 505.

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