Corythalia opima (♂,♀) (PECKHAM & PECKHAM, 1885)

In addition to the genus diagnosis, the following features characterize the species:

MALE

Body: MarkingsOpistosoma with dark or bright spots . basic colouring dark. Carapace: ColourationLaterally without light bands. Chelicera: Base furrow teeth number promarginal2 teeth. Eyes: AERdorsal edge recurve. Labium: Lengthlonger than wide. Palp: GnathocoxaCorner present. Tibia - retrolateral tibial apophysis - characteristicsdorsal serration absent. base of RTA distinctly wider than distal section (consider also retrolateral view). RTA in ventral view very slim. RTA very long (longer than width of tegulum). RTA in retrolateral view more or less parallel with longitudinal axis of palp. RTA in retrolateral view without bent (or just indistinct bent). Tibia - ventral bump - sizeabsent or at least not recognisable as such. Tibia - ventral bump - characteristicsinconspicuous. Cymbium: Presence of prominent ridges or extensions ventrally absent. Tegulum: Widthtegulum narrower than cymbium. Shape of proximal halfproximal tegulum lobe present. proximal tegulum lobe absent. Proximal lobe - positionat retrolateral half of tegulum. Proximal lobe - size rel.medium-sized. broad. Proximal lobe - shaperegularly rounded. Special structureswith (fine) transversal ridge (often at distal half at the area of the border between embolic division and tegulum). Sperm duct - locationoccupying clearly more than retrolateral half and at most 3/4. Sperm duct - shapedouble-stacked S-shaped, with proximal loop larger than others. Embolus: Base positioncentro-distally (or even retrolatero-distally). Base circle sizesmall (width between 1/3 and 1/2 the width of tegulum). Base - special structuresSpecial structures at/ on embolus base absent (except for indistinct ridges or flat bulges that are often recognisable). Arising point3 o´clock-position. 4 o´clock-position. Direction of distalmost sectionprolatero-distally (with between 11° and 50° angle from longitudinal axis of cymbium). width relation - at arising point - subdistallyfrom 4.1x to 7.5x broader. width relation - subdistally - centrallyfrom > 3/4 to < 1x the width of central section. General structurewithout or with 1-3 (at most) longitudinal ridges. very long, more than 1.5x the width of tegulum. with more than 3/4 winding but less than 1 winding. without distinct embolic lamella over entire embolus length. without apophysis. in ventral view subdistally distinctly narrower than proximally. filiform (very narrow: centrally with less than 1/4 the width of sperm duct). Special structuredistally pointed. without apohysis (apophyses). Legs: Leg formula3-4-2-1. Colourationdark red-brown or brown with few lighter annulations, mainly at proximal articles and tarsi. completely or mainly with dark colour (e.g. dark red-brown) ((hardly with lighter sections, e.g. only tarsi lighter). Opisthosoma: Colourationthree bands; AM broadest; C & PM longitudinally connected by large and broad light patch. three bands; C & PM medially interrupted or at least less distinct; C broadest, but still narrow (< 1/6 OL), without d. chevron; PM very narrow, but still slightly broader than AM, hence, O with large dark field occupying large part of anterior half of O. Distribution: Geographical DistributionNorth America.

Dimensions

Dimensions Body: Total length8.6 mm. Carapace length4.2 mm. Carapace width3.1 mm. Fovea length0.37 mm. Opisthosoma length3.7 mm. Opisthosoma width2.6 mm. Dimensions Clypeus : Height at AME0.4 mm. Height at ALE0.94 mm. Dimensions Eyes : Ocular area width2.4 mm. AME Ø0.76 mm. ALE Ø0.46 mm. PME Ø0.14 mm. PLE Ø0.4 mm. AME<=>ALE 0.08 mm. AME<=>AME PME<=>PME 1.97 mm. PME<=>PLE 0.3 mm. ALE<=>PLE 0.92 mm. PLE<=>PLE 1.75 mm. Dimensions Palp : total length3.1 mm. Femur length1.2 mm. Patella length0.5 mm. Tibia length0.3 mm. Tarsus length1.1 mm. Dimensions Legs: Femur I2.4 mm. Femur II2.5 mm. Femur III3.0 mm. Femur IV2.7 mm. Patella I1.4 mm. Patella II1.4 mm. Patella III1.4 mm. Patella IV1.3 mm. Tibia I1.7 mm. Tibia II1.7 mm. Tibia III2.0 mm. Tibia IV1.9 mm. Metatarsus I1.4 mm. Metatarsus II1.4 mm. Metatarsus III2.0 mm. Metatarsus IV2.2 mm. Tarsus I 0.8 mm. Tarsus II0.8 mm. Tarsus III0.9 mm. Tarsus IV0.9 mm. Leg I7.6 mm. Leg II7.7 mm. Leg III9.3 mm. Leg IV9.0 mm.

FEMALE

Body: MarkingsOpistosoma with dark or bright spots . basic colouring dark. Carapace: ColourationLaterally with light bands. Laterally without light bands. Eyes: AERdorsal edge recurve. Labium: Lengthlonger than wide. Palp: GnathocoxaCorner present. Legs: Leg formula4-3-2-1. Colourationdark red-brown or brown with few lighter annulations, mainly at proximal articles and tarsi. completely or mainly with dark colour (e.g. dark red-brown) ((hardly with lighter sections, e.g. only tarsi lighter). Opisthosoma: Colourationthree bands; AM broadest; C & PM longitudinally connected by large and broad light patch. Epigyne: Field - presencepresent. Field - width(slightly) longer than broad. broader than long. Window - posterior margin - positionnot reaching the epigastric furrow. Copulatory opening - locationlocated centrally or more or less centrally in epigyne. Vulva: blind sac - lengthat least 3x longer than broad. less than 3x longer than broad. fertilization duct - arising pointcentro-anteriorly. fertilization duct - widthinitial section of fertilisation duct narrow. primary spermatheca - shapeelongated sac-like. primary spermatheca - size rel.large (diameter of primary spermatheca more than 2/3 the length of epigynal window, but less than 3/4). primary spermatheca - positionno statement possible (e.g. because secondary spermatheca missing). secondary spermatheca - presenceabsent (at least not recognisable as such; spermathecal heads may be located on a slightly widened section of the copulatory duct). secondary spermatheca - spanno statement possible as secondary spermathecae absent. secondary spermatheca - orientationno statement possible as secondary spermathecae are absent. connective duct - initial positioncentro-anteriorly. connective duct - widthnarrow (width of secondary spermatheca / width of connective duct < 4, but > 3). medium-sized (width of secondary spermatheca / width of connective duct < 3, but > 2.5). connective duct - final positionposterio-medially. connective duct - shapemainly straight (or at least approximately straight) longitudinally, but at initial half with 180° (re-)curve medially. connective duct - length rel.very long (length of connective duct / width of primary spermatheca > or equal 2). head of spermatheca - shapeno statement possible, because heads of spermathecae absent. Distribution: Geographical DistributionNorth America.

Dimensions

Dimensions Body: Total length10.2 mm. Carapace length5.1 mm. Carapace width3.9 mm. Fovea length0.65 mm. Opisthosoma length5.1 mm. Opisthosoma width3.5 mm. Dimensions Clypeus : Height at AME0.59 mm. Height at ALE1.22 mm. Dimensions Eyes : Ocular area width2.8 mm. AME Ø0.92 mm. ALE Ø0.56 mm. PME Ø0.16 mm. PLE Ø0.48 mm. AME<=>ALE 0.11 mm. AME<=>AME PME<=>PME 2.53 mm. PME<=>PLE 0.38 mm. ALE<=>PLE 1.1 mm. PLE<=>PLE 2.24 mm. Dimensions Palp : total length4.5 mm. Femur length1.6 mm. Patella length0.9 mm. Tibia length0.7 mm. Tarsus length1.3 mm. Dimensions Legs: Femur I2.9 mm. Femur II3.0 mm. Femur III3.4 mm. Femur IV3.4 mm. Patella I1.8 mm. Patella II1.8 mm. Patella III1.9 mm. Patella IV1.8 mm. Tibia I1.8 mm. Tibia II1.9 mm. Tibia III2.2 mm. Tibia IV2.2 mm. Metatarsus I1.6 mm. Metatarsus II1.6 mm. Metatarsus III2.3 mm. Metatarsus IV2.5 mm. Tarsus I 0.9 mm. Tarsus II0.9 mm. Tarsus III1.1 mm. Tarsus IV1.0 mm. Leg I9.0 mm. Leg II9.2 mm. Leg III10.9 mm. Leg IV10.9 mm.