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Descriptions of New Taxa

A Supplement to Salticidae Diagnostic Drawings Library

by Jerzy Proszynski 1997

Descriptions of new species, in print now, or in preparation for print, made provisionally available for the Users of the Diagnostic Drawings Library because of long delay in publication.
Arachnologists using these descriptions and drawings are kindly requested to acknowledge that in their publications. Attention: the International Code for Zoological Nomenclature does not recognize taxonomic names unles description is printed on paper.

Mogrus logunovi Proszynski, 2000

  • See Drawings
  • Material: ISRAEL: female HOLOTYPE ALLOTYPE: PARATYPES:

    Synonym: Mogrus neglectus: Proszynski, Lubin 1993.

    Remark. Dr. D.V. Logunov has called my attention to the specific identity of syntypes of Mogrus neglectus and Mogrus dumicola, illustrated in my paper of 1991 (Andreeva, Kononenko, Proszynski, 1981), which forces me to retain name Mogrus neglectus for the species called previously M. dumicola and to change all my previous (prior to December 1996) identification of "Mogrus neglectus" to the new name Mogrus logunovi, described below. At the same time I received new specimens from Dr. R.R. Jackson, which permitted to define differences between these species.

    Etymology. Named for Dr. D.V. Logunov of the Zoological Museum, Institute of Systematics and Ecology of Animals, Novosibirsk, Russia, in thanks for valuable cooperation and useful suggestions.

    Remarks. Resembles Mogrus frontosus (Simon, 1871) from Corsica (Andreeva, Kononenko, Proszynski, 1981, figs. 12-14), from which differs by tibial apophysis broader and posteriorly bent, slightly different proportions of epigyne and longer channels. Females easily found during breeding season (IV-VI) in white silk retreats (about 1.5 cm in diameter) on branches of small thorny shrubs, occuring together with M. neglectus on the same shrubs, in a border zone between Mediterranean and desert vegetation, males dwells on the ground.

    Diagnosis. Face covered with dense setae, orange to whitish yellow. Male abdomen silver whitish with dark median streak, female abdomen dark with white delimited black median streak with prominent angular extensions. Bulbus protuberance at 13 o'clock position, apophysis bend. Epigyne sclerotized, with posterior ends of semicircular groove broadly spaced; spermatheca smaller by half from that of M. dumicola, atop prominently bent anterior channel.

    Male

    Color pattern of cephalothorax variable, due to setae easily falling of, in better preserved specimen covered with whitish long setae, easily faliing out leaving bald, blackish brown tegument, there are remnants of orange setae on median streak of the thoracal slope. When cephalothorax bald, the tegument of eye field is almost black (in longer preserv longer preserved specimens faded to light brown with dark encircled lateral eyes), darker pigmentation along posterior eye field followed by slightly lighter belt; dorsal thoracal area darker with still darker lines radiating from fovea to the ventral margin, posteriorly and laterally; sides lighter brown with indistinct whitish setae, passing into yellow, lightest near dark pigmented, thin, ventral margin. Abdomen dorsally covered with silver white setae with scattered darker spots, there is dark broad median streak, smooth, finely serrated (in Jordan specimen more complicated - Fig. 826), sides appear darker due to sparser setae whitish and yellowish. Ventral aspect: sternum dark brown with long colourless setae; coxae whitish or yellowish; abdomen whitish with median area dark grey, with two lines of grey dots narrowly spaced.

    Frontal aspect: enire face orange, including setae surrounding eyes I, there are a few longer brownish setae in the upper half of face, in some specimens clypeus has admixture of colorless setae, longer near its ventral edge; chelicerae black, arise vertically, in plane of face, forming indistinct median space between them, their antero-median walls with transverse ridges (stridulatory ?). Pedipalps and patella - tibia I light brown, darker annulated. Legs distinctly lighter than in M. dumicola: ventral and lateral surfaces of majority of segments whitis or yellowish, dorsal surfaces light with darker annuli on tarsi-metatarsi III-IV; femora I-IV dorsally light brown with median longitudinal darker line, laterally light greyish; patellae and tibiae I-IV brown - lighter in the middle of dorsal surface; metatarsi-tarsi I-IV brown annulated. Palpal organ: bulbus bean shaped, set slightly diagonally across posterior half of cymbium, protuberance at 1 o'clock position, broad basis of embolus stretches from roughly 3 to 6 o'clock position, more distally embolus thin; tibial apophysis thin, long, in apical half slightly bent dorsally, then half way bent very slightly in an opposite direction.In some specimens minute apical bifurcation of embolus, also shown in Hadjissarantos 1940: 103 fig. 35.

    Female

    Cephalothorax covered by mixture of black (on relatively fresh specimens) and light scales, denser concentration of light scales form small median spot between eyes III and two thoracal streaks delimiting black median one - all these neither sharp nor contrasting; also some irregular small light spots; sides somewhat lighter mosaic, ventral margin of carapace black pigmented.

    Abdomen dark grey with black median streak of fused chevrons, with their posterior angles gradually longer in the posterior part of abdomen, delimited on each side, often strikingly, by whitish setae, gradually passing into grey marginal area; whenever the white setae are lost, the pattern disappears partially or totally. The presence of three anterior angles of the streak is a species indicator, these are absent in M. neglectus where narrow, anterior part of the streak is delimited by thin, parallel white lines. Margins of dorsal surface covered by brownish and whitish setae; across posterior half of sides of abdomen two diagonal white lines, which may be broken into several pairs of dots.

    Frontal aspect: face reddish brown, contrasting with intensely black chelicerae, which are thick; a few whitish setae laterally on clypeus and beneath AME but absent on the mid-length of clypeus; eyes I surrounded with whitish setae, there is a number of black bristles entering broad space between ALE and AME, long sparse white setae above chelicerae, some entering surface of chelicerae as well. Pedipalps yellow with brown bases of segments and brownish yellow tarsus; numerous black bristles intermixed with whitish long setae; tibia and patella I yellow, dark annulated. In some specimens eyes I surrounded with light fawn dense setae, lighter under ALE and near ventral edge of clypeus; clypeus light fawn, variable with density of horizontal white setae and color intensity; explanation of these differences require further studies.

    Legs: dark yellow with blackish brown annuli; femora I-II with apical dark annuli, femora III-IV with both basal and apical dark annuli as well as ventral half of lower lateral surfaces, but dorsal surfaces yellow; hairy appearance. In some specimens darker median dorsal line. Ventral aspect: sternum light brown with dark margin; coxae yellow, abdomen like , with median dark and marginal areas light, the lines of spots located on dark area (in difference to ).

    Epigyne: median sclerotized plate broadly truncated posteriorly; copulatory openings in the posterior half of epigyne, broadly spaced, sclerotized folds outside slits posteriorly straight, or slightly constricted posteriorly, but not as much as in M. neglectus. Membraneous copulatory channel narrower than in M. neglectus, pass posteriorly into bent channel, running first anteriorly and only later bending transverse, with a prominent accessory gland at the top of the bent, then appears either turning back and through tight, more sclerotized coil entering narrow spermatheca, on the level of half length of the copulatory channel, or pass directly into sclerotized spherical spermatheca; the difference presumably due to imprecise observation.

    Females epigyne sclerotized, with posterior ends of semicircular groove broadly spaced, or only indistinctly narrowed. Final identification by bent anteriorly, soft transverse channels with scent pore in the middle, median spherical spermathecae.

    Remark. Specimens from Jordan differs from specimens from Negev by abdominal pattern: in female lighter, with shorter angles protruding from the median streak, in male by slightly different shape of the median streak. However, the genital organs do not seem different.

    Measurements (mm): Female. Length of cephalothorax 2.92; length of abdomen 3.82; length of 5 segments of leg I 5.50 .

    Distribution: Israel: Negev: Avdat, Be'er Mash'abbim (sands), Bir Sludj, N. of Sede Boqer, Halot Mashas, Haluqim, Hatira, Sede Boqer, Sede Zin near Sede Boqer, N. of Nahal Sekhar, sand dunes 15 km. S Beer Sheva, Hahalot, Shirta. Tel Yerucham, Yerucham. Arad, Jerusalem, Talpiot (171/129), Ginnegar (1745/2297), Revivim; Jordan (Wadi Ram, 9.II.95, leg. Y. Lubin). Seasonal appearance: MM - II, III, IV, XI, XII; FF: - II, III, IV, V, VII, VIII, IX, X, XII.

    Copyright © for the page by J. Proszynski, 2000.