Symphytognatha cabezota, Dupérré & Tapia, 2017

Dupérré, Nadine & Tapia, Elicio, 2017, On some minuscule spiders (Araneae: Theridiosomatidae, Symphytognathidae) from the Chocó region of Ecuador with the description of ten new species, Zootaxa 4341 (3), pp. 375-399 : 392-396

Symphytognatha cabezota new species

FIgS 34–38 , 47, 48

Type material. MAlE HOlOtypE AND fEMAlE AllOtypE frOM EcUADOr, COtOpAxI PrOvINcE, OTONGA BIOlOgIcAl RESErvE, 13–15.xI.2014, SIftINg lIttEr, E. TApIA, C. TApIA, N. DUpérré ( QCAZ). FEMAlE pArAtypE frOM EcUADOr, COtOpAxI PrOvINcE, OTONGA BIOlOgIcAl RESErvE, 05–07.Ix.2014, gENErAl cOllEctINg, E. TApIA, C. TApIA, N. DUpérré ( ZMH).

Etymology. THE SpEcIfIc NAME IS A NOUN IN AppOSItION tAkEN frOM tHE SpANISH lANgUAgE MEANINg “bIg HEAD”.

Diagnosis. MAlES AND fEMAlES MOSt rESEMblE Symphytognatha carstica bUt ArE DIStINgUISHED by tHE DIffErENt cOlOUrAtION Of tHEIr cArApAcE AND AbDOMEN, DArk brOWN cArApAcE AND AbDOMEN WItH NO DIStINct pAttErN, fUrtHErMOrE MAlES ArE DIStINgUISHED by tHEIr StrAIgHt EMbOlUS; fEMAlES by tHE INtErNAl DUctS Of tHE SpErMAtHEcAE StrONgly cOIlED ( FIg. 38 ).

Description. Male (holotype): TOtAl lENgtH: 0.92; cArApAcE lENgtH: 0.2; cArApAcE WIDtH: 0.3, AbDOMEN lENgtH: 0.56; AbDOMEN WIDtH: 0.67; AbDOMEN HEIgHt: 0.8. CEpHAlOtHOrAx: CArApAcE DArk brOWN WItH grEy MArkINg ON pArS tHOrAcIcA rEAcHINg MArgIN AND rADIAtINg lINES ( FIg. 47 ). PArS cEpHAlIcA StrONgly ElEvAtED, pArS tHOrAcIcA SlOpINg AbrUptly ( FIg. 47 ). ClypEUS HIgH (2x PME), cONcAvE. CHElIcErAE lIgHt brOWN SUffUSED WItH grEy; prOjEctED fOrWArD, SUtUrE vISIblE ( FIg 48 ). StErNUM, DArk brOWN StrONgly SUffUSED WItH DArk grEy, trUNcAtED. ENDItES AND lAbIUM brOWN SUffUSED WItH grEy, lAbIUM fUSED tO StErNUM, At lEASt tHrEE tIMES AS WIDE AS lONg. EyES: SIx EyES, PME lArgEr; LE rOUNDED, cONtIgUOUS, PLE-PME SEpArAtED by PLE DIAMEtEr, PME SEpArAtED. AbDOMEN: OvAl; DOrSAlly AND vENtrAlly WItH brOWN bAckgrOUND cOlOUr AND INDIStINct pAttErN. LEgS: LIgHt bEIgE; lEgS tOtAl lENgtH 0.9/0.9/0.7/1.1; lEg fOrMUlA 4123. GENItAlIA: PAlpAl cyMbIUM lArgE AND OvAl ( FIg. 35 ); pArAcyMbIUM trIANgUlAr ( FIg. 34 ); cONDUctOr WIDE, SEMI-trANSpArENt WItH trIANgUlAr tIp vENtrAlly AND DArkEr, trIANgUlAr DOrSAl ElEMENt ( FIg. 34 ); EMbOlUS StrAIgHt, rOUNDED ApIcAlly, tIp pOSItIONED bEtWEEN tHE vENtrAl AND DOrSAl ElEMENtS Of tHE cONDUctOr ( FIg. 34 ).

Female (allotype): TOtAl lENgtH: 1.7; cArApAcE lENgtH: 0.4; cArApAcE WIDtH: 0.5, AbDOMEN lENgtH: 1.3; AbDOMEN WIDtH: 1.2; AbDOMEN HEIgHt: 1.2. CEpHAlOtHOrAx: OvErAll cOlOUrAtION AS IN MAlE, bUt A SHADE DArkEr. EyES: AS IN MAlE. AbDOMEN: AS IN MAlE. LEgS: COlOUrAtION AS IN MAlE. LEgS tOtAl: lENgtH 0.9/0.9/0.9/1.4; lEg fOrMUlA 4123; fEMAlE pAlp, AbSENt. GENItAlIA: EpIgyNAl plAtE flAt, StrIAtED WItH A SMAll trIANgUlAr ExtENSION MEDIAlly ( FIg. 37 ). SpErMAtHEcAE lOZENgE WItH INtErNAl DUctS cOIlED; cOpUlAtOry DUctS WIDE, StrAIgHt; fErtIlIZAtION DUctS SHOrt AND tWIStED ( FIg. 38 ).

Distribution. EcUADOr: KNOWN ONly frOM tHE typE lOcAlIty.

Natural history. THIS SpEcIES UNlIkE S. cartisca DOES NOt prESENt ANy AffINIty tO cAvE HAbItAt ON AccOUNt Of tHE AbSENcE Of cAvES IN tHE NEArby rEgION, MOSt SpEcIMENS WErE fOUND SIftINg lIttEr.

Note. BrEScOvIt et al. (2004:76) MENtIONED tHAt tHE fEMAlE SpErMAtHEcAE ArE SUrrOUNDED by SOME cOIlED DUctS, cOIlED DUctS WErE AlSO fOUND IN S. cabezota n. sp. bUt tHE cOIlS ArE DEfINItEly lOcAtED INSIDE tHE SpErMAtHEcAE.

Figures

FIGURES 34 – 38. Symphytognatha cabezota n. sp. 34. Male palp, ventral view. 35. Male palp, dorsal view. 36. Male carapace, dorsal view. 37. Female internal genitalia, ventral view. 38. Female internal genitalia, dorsal view.

FIGURES 47, 48. Symphytognatha cabezota n. sp. 47. Male, habitus dorsal view. 48. Male, habitus frontal view.