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searchable PDF - Association for Mexican Cave Studies

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dorsal and ventral views are offered here <strong>for</strong> allepigyna to give exact in<strong>for</strong>mation on the internalstructures. Care must be taken during study of thesesmall spiders: some epigyna measuring only 0.2 or0.3 nun may float away in the preservative or be lostby sticking to <strong>for</strong>ceps or dropping on unfavorablesurfaces.The descriptions that follow list verbal and illustrativedata sufficient to make identification easy.The offered diagnosis aims to present a concisecompendium of features separating the taxon fromall known relatives: it is a succinct series ofmorphological, geographical and ecological charactersthat position the taxon among members of itsspecial group and may even identify it specifically.In many taxa its role is adequately served by mentionof a single genital feature or in cavernicoles of asingle cave. The aim of the <strong>for</strong>mal description is tooffer a more complete picture of the taxon withsome mention of the basic characters of eye pattern,measurements, and locality in<strong>for</strong>mation but withreluctance to duplicate the general data of the preliminarydiagnosis. In final analysis it has beenconcluded the specific characters are best shown inthe details of the epigyna of females where most ofthe pertinent in<strong>for</strong>mation is found. The presence offew adult males in the collection illustrates their existencebut also shows that even among the few representativestheir palpal figures give little data onspecific identification. In that sex it is un<strong>for</strong>tunatethat outside of good characters in eyed taxa that thecharacters of their quite complicated palpi offer littleto separate the species.LIST OF THE EYED TAXADescriptions of the seven previously describedspecies and 16 additional new ones are listed within<strong>for</strong>mation on state and county localities as follows:ARKANSAS: Washington County: secreta, newspecies. Bradley County: arkansa, new species.MISSOURI: Oregon County: harrietae, new species.OKLAHOMA: Latimer County: oklahoma,new species. TEXAS: Bexar County: minorata(Gertsch and Davis); gatita, new species. BlancoCounty: blanco, new species. Burnet County: marmorea,new species. Comal County: joya, new species.Duval County: rudimentops Chamberlin andIvie. Hays County: aenigma, new species. KendallCounty: pampa Chamberlin and Ivie. Kerr County:microps Chamberlin and Ivie; dorothea, new species;modesta, new species. Kimble County: rosae,new species. Llano County: texana (Gertsch). PecosCounty: mirifica, new species. San Patricio County:sintonia, new species. Starr County: riograndeGertsch and Mulaik. Tom Green County: hexopsChamberlin and Ivie. Travis County: annadillo,new species. Val Verde County: delrio, new species.Cicurina arkansa, new speciesChart 1, Figs. 1-2,37-38Diagnosis.-Eight-eyed eplgean species ofBradley County, Arkansas; anterior median eyessubcontiguous; index coil of epigynum (Fig. 1) witha tight loop in subvertical position; conductor ofmale palpus (Fig. 37) with thin loop running to nearend of cymbium.Etymology.-Specific name <strong>for</strong> the State ofArkansas.Description.-Female holotype: Length 2.4 nun.Carapace 1.2 nun long, 0.7 nun wide. Abdomen 1.2nun long, 0.8 nun wide. Clypeal height full widthof anterior lateral eyes; both eye rows (Chart I) essentiallystraight with posterior medians separatedby full diameter and half as far from subequal lateraleyes. Chelicerae: retromargin of fang with 9 teeth inclose file.I II III IV PalpFemur 0.95 1.00 0.80 1.00 0.20Patella 0.20 0.20 0.15 0.20 0.12Tibia 0.80 0.55 0.50 0.80 0.15Metatarsus 0.55 0.58 0.60 1.00Tarsus 0.25 0.25 0.20 0.60 0.15Total 2.75 2.58 2.25 3.60 0.62Leg <strong>for</strong>mula: 4123. First leg three times as longas carapace; fourth leg about four times as long ascarapace; patella-tibia of first and fourth legs shorterthan carapace; metatarsus-tarsus of fourth leg muchlonger than carapace; metatarsus of fourth legslightly longer than carapace.Epigynum (Figs. 1-2): spermathecum roundedlobe broadly jointed to smaller sac; thick connectingcanal closely encircling spermathecal parts.Male: Length 3.65 nun. Carapace 1.80 nun long,1 nun wide. Abdomen 1.85 nun long, 0.85 romwide. Eyes closer together than in female; both rowsgently procurved to essentially straight; posteriormedian eyes separated by less than full diameter,half as far from subequal lateral eyes. Spines of firstand fourth tibiae 2-2-2.I II III IV PalpFemur 1.13 0.95 1.00 1.15 0.50Patella 0.20 0.25 0.30 0.50 0.20Tibia 1.00 0.40 0.30 1.00 0.20Metatarsus 0.80 0.90 0.80 1.10Tarsus 0.60 0.55 0.50 0.63 0.60Total 3.73 3.05 2.90 4.38 1.5084

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