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Salticidae: Diagnostic Drawings Library

by Jerzy Proszynski 1997

Redescription

Euophrys diminuta (Banks, 1896)

= Corythalia diminuta (Banks, 1896)

See Drawings] ..... [ See color photo ]
Icius diminuta Banks 1896: 192 (D female)
Euophrys diminuta: Kaston 1948: 456 T. 89 F. 1659 (D female)
Euophrys diminuta: Richman, Cutler 1978: 85 (N) [USA: NY.Con.]
+ +

Material: 1) 1 female "Icius diminuta Bks. TYPE, Bayville N.Y." Coll. MCZ 2) 1 male, 2 female female Euophrys diminuta Bks. det. B. Cutler. New York: Long peninsula near Orient Point, Long Island. May 3, 1955. Wilton Ivie collector. Coll. AMNH - NY. (sample contains also some immature specimens, presumably of Talavera minuta).

Remark. Not an Euophrys, presumably a Corythalia, although I am uncertain of delimitation of that genus. 1 male and 2 females from Long Island are conspecific because of similar abdominal colour pattern in both male and female: brown with white anterior marginal line, a pair of diagonal white lines in anterior half of abdomen, and two pairs of very short diagonal lines or dots in front of spinnerets (Fig. 19). Females have similar epigyne with type specimen, the color difference presumably due to discoloration of the latter.

CEPHALOTHORAX

in mm In % of L. cphth.
TYPEfemale NY male NY female TYPEFemale NY male NY female
L. cphth.: 1.11 1.15 1.33 100% 100% 100 %
L. e. f.: .55 .49 .62 49% 43% 47%
H. cphth .49 .53 .57 44% 46% 43 %
W. e. f. I .76 .80 .98 68% 69% 74%
W. e. f. III .77 .80 .93 69% 69% 70%
W. cphth. e. III .80 .86 .93 72% 75% 70%
Max. w. cphth.: .86 .93 - 75% 70% %
L. flat surf. cphth .31 .53 .53 % % %
L. ABDOMEN 1.48 .89 1.42 % % %
Max. w. abd .98 .:.80 1.07 % % %

1)TYPE-female, 2-3) NY male-female (in mm), 4)TYPE-female, 5-6)NY male-female (in % of L. cphth.)

1 2 3 4 5 6

-----------------------------------------------------------
L. cphth.: 1.11 1.15-1.33 : 100 100-100 %
L. e. f.: .55 .49- .62 : 49 43-47 %
H. cphth.: .49 .53- .57 : 44 46-43 %
W. e. f. I: .76 .80- .98 : 68 69-74 %
W. e. f. III: .77 .80- .93 : 69 69-70 %
W. cphth. e. III: .80 .86- .93 : 72 75-70 %
Max. w. cphth.: - .86- .93 : 75-70 %
L. flat surf. cphth: .31 .53- .53 :
ABDOMEN : L. abd.: 1.48 .89-1.42
Max. w. abd.: .98 .80-1.07
Length of LEGS in mm and in %

----------------------------------------------------------------
Leg I Leg II Leg III Leg IV
1 2 3 4 5 6
---------------------------------------------------------------
tarsus .25 - - : .18 .27- : .25 .27- : .31 .31- .35
metatar. .28 - - : .25 .27- : .31 .31- : .37 .40- .49
tibia .37 - - : .25 .27- : .33 .35- : .43 .40- .53
patella .31 - : .29 .31- : .31 .27- : .28 .27- .35
femur .49 - : .49 .53- : .58 .67- : .64 .62- .73
------------------------------------------------------------------
Total 1.70 : 1.46 1.65- : 1.78 1.87- : 2.03 2.00-2.45
-----------------------------------------------------------------
in % of leg I. 100 % : 86 % : 105 % : 119 % :
----------------------------------------------------------------

Male

Cephalothorax: light brown with eye field grey and its anterior and lateral margins darkening to almost black; indistinct lighter transverse area behind eye field; thin ventral edge of carapace blackish and traces of indistinct darker vertical lines across the sides; no conspicuous setae, tegument partially light reflecting. Abdomen: brown with white anterior marginal line, a pair of diagonal white lines in anterior half of abdomen, and two pairs of very short diagonal lines or dots in front of spinnerets; somewhat resembling patter in some Evarcha, from which is much smaller; similar in both male and female, type specimen is presumably discolored. Frontal aspect: face brown, with lighter clypeus covered by dense and long whitish setae directed transverse, sparse minute whitish setae around rims of eyes I, chelicerae dark yellow; pedipalps dark yellow with darker setae on cymbium. Ventral aspect: mouth parts, sternum and coxae yellow, abdomen light greyish brown. Legs uniformly dark yellow, sparse darker setae (legs I missing); in Talavera minuta legs with contrasting dark and light rings. Palpal organ: embolus straight, located anteriorly on rounded flap, meandering channel not visible on the specimen studied, tibial apophysis prominent.

Female

Cephalothorax dark brown, eye field blackish brown, type specimen light brown; sides slightly lighter brown with faint greyish shade, traces of indistinct darker vertical lines; no conspicuous setae, tegument partially light reflecting; ventral edge thin black. Abdomen: brown with white anterior marginal line, a pair of diagonal white lines in anterior half of abdomen, and two pairs of very short diagonal lines or dots in front of spinnerets; similar in both male and female, type specimen light brown with white anterior marginal line, presumably discolored. Frontal aspect: face brown, the majority of its height taken by AME, eyes ALE set along the middle of the AME, below their dorsal edge; sparse minute whitish setae around rims of eyes I, a few longer colorless thin setae overhanging diagonally bases of greyish brown chelicerae, lighter apically; pedipalps dark yellow, without more conspicuous setae. Ventral aspect: mouth parts greyish brown, sternum light brownish yellow, coxae light, abdomen light greyish brown. Legs uniformly brown, in one specimen with lighter joint areas, sparse darker setae; in Talavera minuta legs with contrasting dark and light rings; in holotype light yellowish brown, tibia I with three pairs of ventral spines, metatarsus I two pairs. Epigyne: simple transverse sclerotized spermathecae, slightly bent, with opening at median end, no channels. I abstain from dissecting epigyne of the holotype specimen.

Copyright © for the page by J. Proszynski , 2000.
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Statement on synonymy of Euophrys diminuta and Corythalia delicatula (from a letter of G. B. Edwards, February 19, 2001)
The article containing the synonymy of Corythalia delicatula is in the following publication: Edwards, G.B. 1980. Jumping spiders of the United States and Canada: Changes in the key and list (4). Peckhamia 2(1): 11-14.
The text simply states: "NEW SYNONYMIES and NEW COMBINATIONS are based on examination of types." The following is the first entry of a list of synonymies.
"Corythalia delicatula Gertsch and Mulaik 1936 = Euophrys diminuta (Banks) 1896. NEW SYNONYMY. (As originally published). The species should now be in Euophrys, not Corythalia."
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Catalogue and some references
F Corythalia diminuta. Banks, 1896) USA: New York, Connecticut Icius diminuta Banks 1896: 192 (D F). Corythalia delicatula Gertsch et Mulaik 1936a: 14 TF. 32 (DF) Corythalia delicatula: Chamberlin, Ivie 1944: 195 TF. 211-212 (MF). Euophrys diminuta: Kaston 1948: 456 T. 89 F. 1659 (D F) Corythalia delicatula: Proszynski 1976: f. 127. Corythalia delicatula: Richman, Cutler 1978: 84 (N) Euophrys diminuta: Richman, Cutler 1978: 85 (N) Euophrys diminuta: Edwards 1980: 11 (M s. Corythalia delicatula) Euophrys diminuta: Proszynski (this Catalogue, ver. 1992) (not Euophrys, presumably Corythalia) Catalogues: Bonnet 1958: 1236, 1874; Roewer 1954: 11021, 1182; Geographical distribution: USA: Arizona, California, Texas, Florida, Georgia. COLLECTIONS: HAR - Icius delicatula TYPE; NY - Corythalia delicatula TYPE. . Gertsch W. J. & W. Ivie 1955. The spider genus Neon in North America. Am. Mus. Novit. 1743: 1-17. Gertsch et Mulaik 1936a: 14 TF. 32 (DF) (brak w moim katalogu) Chamberlin R. V. & W. Ivie. 1944. Spiders of the Georgia region of North America. Bull. Univ. Utah (Biol.) 35(9): 1-267. Edwards G.B. 1980b. Jumping spiders of the United States and Canada: Changes in the key and list (4). Peckhamia, Gainesville, 2, 1: 11-14.