Palmanura contrerasi Palacios-Vargas & Arango, 2018

Arango, Angela, Palacios-Vargas, José G., Vázquez, Magdalena & Marín, Elida P., 2018, Revision of the genus Palmanura Cassagnau, 1983 (Collembola: Neanuridae: Neanurinae: Sensillanurini), Zootaxa 4483 (1), pp. 128-154 : 134-138

Palmanura contrerasi Palacios-Vargas & Arango , sp. nov.

FIgS 12–21 , TAbS 5–6

Type material. HOLOTyPE: fEMALE ON SLIdE. PARATyPES: 2 fEMALES ON SLIdES.

Type locality. MÉXICO, OAxAcA, SANTA CRUz (IxTLáN dE JUáREz), 2550 M A.S. L., 01.V.2006, LEg. A. BERNAL ROjAS.

Description. LENgTh (N = 3) 571–798 µM. WhITE. GRANULATIONS MOdERATELy cOARSE, AbOUT hALf ThE SIzE Of ONE EyE. TUbERcLES wELL dEvELOPEd. MOST dORSAL MAcROSETAE PALMATE (PM) (22 µM) ExcEPT fOR ThOSE Of LATERAL TUbERcLE (L), whIch ARE MAcROSETAE bARbULATE (BM) (27 µM), ThE SENSORIAL SETAE (S) (25 µM), vENTER wITh MIcROSETAE (M) (14 µM).

ANT I wITh SEvEN SETAE, ONE dORSAL PALMATE ANd ONE SLIghTLy bARbULATE ( FIgS 12, 15 ANd 19 ); ANT II wITh 9 SMOOTh SETAE, MOST Of ThEM ON vENTRAL SURfAcE. ANT III wITh 14 SETAE, SENSORIAL ORgAN wITh TwO gLObULAR MIcROSENSILLA IN A cUTIcULAR fOLd, ANd TwO gUARd SENSILLA. S.g.v SINUOUS, qUESTION MARk ShAPEd, ONE vENTRO–ExTERNAL MIcROSENSILLUM. ANT IV TyPIcAL fOR ThE gENUS wITh S7 hyPERTROPhIEd ANd NO APIcAL bULb ( FIg. 12 ).

EyES 2 + 2 wITh bLAck PIgMENT ANd ONLy SETA OcM ( FIgS 14 , 20 ). MANdIbLES wITh 2 TEETh, MAxILLAE STyLIfORM. HEAd wITh cLyPEAL, ANTENOfRONTAL, OcULAR, DI ANd DE TUbERcLES wELL dEvELOPEd. LAbRUM wITh 4/2, 2 SETAE. LAbIUM TyPIcAL fOR ThE gENUS. HEAd chAETOTAxy AS IN FIgS 13 , 19 ANd TAb. 5.

COxAE I–III wITh 3, 7, 8 SETAE; TROchANTERS wITh 5, 6, 6; fEMORA wITh 12, 11, 11; TIbIOTARSI I, II ANd III wIThOUT TENENT hAIRS, wITh 18, 18, ANd 19 SETAE RESPEcTIvELy. UNgUIS UNTOOThEd. ThORAcIc ANd AbdOMINAL chAETOTAxy AS IN FIgS 13 , 16 ANd 18 . ThE TOTAL bOdy chAETOTAxy IS ShOwN IN TAbS 5 ANd 6.

VENTRAL SETAE fOR dEMISTERNITE ARE: 3 POSTLAbIAL, 5 cEPhALIc, 4 IN vENTRAL TUbE, 3 VE ON Ab. II; fOUR SUbEqUAL ON fURcAL TUbERcLE ANd 3 VE ( FIg. 21 ); Abd. IV ANd V IN FIg. 21 ANd TAb. 6. FEMALE gENITAL PLATE wITh 3 + 3 PREgENITAL SETAE, 5–9 gENITAL ANd 2 EUgENITAL SETAE. EAch ANAL TUbERcLE wITh 10 SETAE + ONE SETULA. VENTRAL AbdOMINAL chAETOTAxy AS IN FIgS 17 ANd 21 .

Etymology. ThIS SPEcIES IS dEdIcATEd TO DR. ATILANO CONTRERAS RAMOS, fROM ThE INSTITUTE Of BIOLOgy (UNAM) fOR bEINg ThE fIRST MExIcAN cOLLEMbOLOgIST INTERESTEd IN AqUATIc COLLEMbOLA .

Remarks. Palmanura contrerasi sp. nov. ANd Palmanura pascuali PALAcIOS-VARgAS, 1996, ARE vERy SIMILAR fOR ThE STRONg REdUcTION Of cEPhALIc chAETOTAxy, ThEy hAvE ThE SAME NUMbER Of SETAE, bUT ThEIR ShAPE IS vERy dIffERENT, P. contrerasi sp. nov. hAS A PALMATE SETA F ANd OcM, ANd IN P. pascuali ThOSE SETAE ARE bARbULATE ANd MORE AbUNdANT chAETOTAxy ON ThE LATERAL TUbERcLES Of ThE bOdy. ThE NEw SPEcIES IS ALSO SIMILAR TO P. guilleni fOR ThE STRONg REdUcTION Of cEPhALIc chAETOTAxy, bUT MAIN dIffERENcES AMONg ThE ThREE SPEcIES ARE IN AbdOMINAL chAETOTAxy ( TAb. 13).

Variation. ONE cASE Of ASyMMETRy wAS fOUNd IN ThE LATERAL SETAE Of Abd I, BM + M ON ONE SIdE ANd ONLy BM ON ThE OThER SIdE. ONE PALMATE bIfId SETA wAS fOUNd IN ThIRd AbdOMINAL SEgMENT ON DI TUbERcLE. SMALL vARIATION IN ThE gENITAL SETAE Of ThE PLATE Of ThE fEMALE wAS ALSO NOTEd.

Figures

FIGURES 12–15. Palmanura contrerasi Palacios-Vargas & Arango, sp. nov. 12, antenna in dorsal view; 13, cephalic chaetotaxy of head and thorax; 14, eyes and seta Ocm; 15, dorsal modified setae on Ant I.

FIGURES 16–17. Palmanura contrerasi Palacios-Vargas & Arango, sp. nov.16, abdominal dorsal chaetotaxy; 17, ventral chaetotaxy of abdomen.

FIGURES 18–21. Palmanura contrerasi Palacios-Vargas & Arango, sp. nov. photos in contrast fase microscope. 18, dorsal body; 19, right antenna and anterior part of head; 20, ocular setae Ocm and eyes; 21, ventral chaetotaxy of Abd IV–VI.