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Salticidae: Diagnostic Drawings Library

by Jerzy Proszynski 1990

 

Euophrys monadnock Emerton, 1891

[Figs. 10-15]

 Euophrys monadnock Emerton 1891: 241 T. 20 F. 2 (D )

 Euophrys monadnock: Proszynski 1976: ff. 100,

Material: 1) 1F Euophrys monadnock. Alberta: on HWY 9 between Cereal and Oyen, 10 km. W of jcn with HWY 41. 10 June 1986. W. Maddison, 86-032. MCZ (epigyne drawing and preparation)

2) 1F Euophrys monadnock ONTARIO: Parry Sound Distr., 14 km. S. of Pointe Au Baril Sta, on HWY 69. 27 May 86, W. Maddison 86. 86-012  MCZ (abdomen drawing).

3) 1M Euophrys monadnock California: San Bernardino Mts., end of Poop Out Hill Rd. at N. border of San Gorgonio Wilderness, 7700 ft. el. 30 June, 1985. W. Maddison 85-086. Coll. MCZ.

4) 1M Euophrys monadnock Canada; La Sienne River. N. Banks Coll. MCZ.

5) 1M Euophrys monadnock N. H . Monadnock. June 22-27, 1924. Mis E. B. Bryant Coll. MCZ.

Comparative material:

1)FF Euophrys aequipes: England, Oxford, 23. VII. 1958. H.W. Levi. Coll. MCZ

Measurements: 

  M in mm F in mm M in % of L. cphth

F in % of L. cphth

Length cphth.  1.54 1.60 100 % 100 %
L. e. f. .74 .74 48 % 46 %
HEight cphth. .80  .86 52 % 54 %
Width eye field at eyes I   1.11 1.11 72 % 69 %
Width eye field at eyes III 1.05 1.08  68 % 67 %
Width of cephth. at e. III 1.05 1.13 68 % 71 %
Max. w. cphth  1.05 1.13 68 % 71 %
L. flat surf. cphth rounded  1.11 - 71 %
L. of ABDOMEN 1.72 1.97    
Max. width of ABDOMEN        

Length of LEGS in mm

 

  M- Leg I F - Leg I M - Leg II F - Leg II M - Leg III F - Leg III M - Leg IV F- Leg IV
tarsus  .37 .37   .37 .37  .43 .43 .55 .55
metatar  .55 .43 .43 .55 .68 .43 1.04 .92
tibia .80 .55    .55 .80  .61 .55 .98 .86 :
patella .55 .55  .49 .55  .55 .55 .52 .55
femur 1.05 .86 1.17 1.06 1.05 .98 1.30 1.17 
Total  of 5 segments 3.32 2.76 :3.01 2.64 3.32 2.94 4.39 4.05
Total  in % of leg I. 100 % 100 % 91 % 96 % 100 % 106 % 132 % 147 %

 

Colour pattern  

Remark. striking contrast of a few white segments of legs (femora III -IV, tarsi I-II, pedipalps) with dark body and very dark legs I with ventral mane of black, broad, long setae along metatarsus, tibia and patella, with similar dorsal, much shorter and less distinct setae along metatarsus, tibia and a part of femur I. Such combination of white femora III-IV and dark remaining segments and body is unique within the genus, however white tarsi appear in several Palaearctic species.

 

Male

Cephalothorax: dark brown or grey, ventral rim darker; eye field almost blackish; no contrasting color pattern. Abdomen: dark brown with six pairs of small and not contrasting lighter spots along median line. Frontal aspect: blackish brown, almost bald, a few unnoticeable minute colorless setae on rims on eyes I, without any contrasting pattern except whitish yellow pedipalps (with exception of basal 3/4rd of femur). Ventral aspect uniformly dark, brown or grey. Legs dark brown (in San Bernardino specimen slightly lighter) contrasting with white or yellowish white femora III-IV, tarsi I-II and pedipalps; legs I very dark with narrow black mane of broad long setae ventrally on tibia I - the longest at the mid length of the segment and gradually shortened towards both extremities, continued shortened along ventral surface of metatarsus and patella I, much shorter and less distinct along dorsal surface of metatarsus, tibia and part of femur I. According to Maddison (personal communication) the white femora of preserved specimens are orange on alive specimen, which resembles some species I collected in Israel. Palpal organ typical for a number of Euophrys species in shape and proportions; whitish yellow, with embolus coil flat anteriorly and very thin, transparent tibial apophysis, visible only under special angle or after separation of tibia from cymbium (fig. 12)

 

 Female

Cephalothorax light greyish brown, slightly lighter dorsally and darker grey at lower sides; eye field almost blackish; no contrasting color pattern; in European E. aequipes cephalothorax light yellow. Abdomen: general coloration dark with whitish spots: two rows of very small oval whitish spots (seven pairs in the studied specimen, another with less spots visible) along median dark streak consisting of fused triangles; followed by irregular darker submarginal streak and slightly lighter margin (fig. 13), this pattern however may be result of post mortem changes; in European E. aequipes abdominal pattern is different: whitish with sparse dark spots, medial ones triangular. Frontal aspect: eye field and immediate surrounding of eyes I dark, rims of eyes I with indistinct and sparse whitish setae, more visible dorsally, clypeus brown with darker rim and slightly lighter area just above rim (in one specimen pronouncedly whitish), almost bald, with a few inconspicuous dark setae; chelicerae light brownish grey, pedipalps yellow with tarsus and tibia darker; legs I dorsally light brown with prolateral surfaces of metatarsus, tibia and patella darker. Ventral aspect: coxae yellow, sternum yellow with brown rim, abdomen behind epigastric furrow stripped longitudinally dark brownish grey and whitish. Legs: dull dark yellow with darker setae, lateral surfaces of legs I and tarsi metatarsi III-IV darker. Epigynum: resembles European E. aequipes in general outline, however the spermathecae seems smaller and channels broader (see fig. 15), the external sclerotized ridges, recently found to be diagnostic, arrive antero-laterally (fig. 14).

Source: Proszynski J. 1990p. Taxonomic revision of N American species of Euophrys and Talavera (Araneae: Salticidae). 6-9, figs 10-15. [Preliminary trial edition of a few copies for the purpose of soliciting comments from the experts in this field. Copied through the kind support of the Zoology Department, Eastern Illinois University. Charleston, Ill. June 1990]., Put into this Internet monograph from version November 2004 onwards.

Copyright © for the page by J. Proszynski, 2004.