Ephemerythus gilliesi sp.

Kluge, Nikita J. & Novikova, Eugenia A., 2017, Revision of Ephemerythus Gillies 1960 (Ephemeroptera: Tricorythidae), Zootaxa 4347 (1), pp. 31-55 : 52

Ephemerythus gilliesi sp. n.

( FIGS 88–97 )

Ephemerythus Sp. C : Kluge 2010a: 30 (larVa).

Etymology. THE SPEcIES IS NAmED IN HONOR Of M.T. GILLIES, WHO PROvIDED uS WITH THE SPEcImEN DEScRIbED bELOW.

Material. HOLOTyPE: L/S ♀: CAMEROON, YAOuNDé, 6.IX.1956, cOLL. M.T. GILLIES (REcEIvED fROm M.T. GILLIES IN 1991 ).

Descriptions. Female larva. BITING EDGE Of mAXILLA RELATIvELy NARROW: INNER-DORSAL ROW, bESIDES TWO DENTISETAE, WITH 2 SETAE PROXImAD Of PROXImAL DENTISETA; INNER-vENTRAL ROW cONSISTING Of 4–5 SETAE; APIcAL TufT Of LONG SETAE cONSISTING Of 6 SHORT ARcHED ROWS ( FIG. 88 ). FEmORA NOT WIDE; STOuT, SPATuLATE SETAE LONG, ON fORE fEmuR fORmING IRREGuLAR, TRANSvERSE ROW ( AS IN E. niger – KLuGE 2010A: FIGS 16, 17 ). FORE TIbIA WITH POINTED, PEcTINATE SETAE ON INNER SIDE, WITH LONGITuDINAL ROW Of STOuT, bLuNT SETAE ON ANTERIOR SIDE, AND WITH IRREGuLARLy SITuATED, STOuT, bLuNT SETAE ON POSTERIOR SIDE ( FIG. 89 ). MIDDLE AND HIND TIbIAE WITH POINTED, PEcTINATE SETAE ON INNER SIDE AND TWO LONGITuDINAL ROWS Of STOuT, bLuNT SETAE ( AS IN E. niger – KLuGE 2010A: FIG. 17 ). HIND PROTOPTERA AbSENT. AbDOmINAL TERGA AND STERNA WITH SPARSE SImPLE SETAE, WITHOuT OTHER SOckETS ( IN cONTRAST TO E. pictus ). TERGALIuS V WITHOuT vENTRAL LObE; TERGALIuS VI AbSENT ( FIGS 90–93 ; AS IN E. pictus – FIGS 40–43 ). CuTIcLE NEARLy uNIcOLOR, OcHER OR bROWNISH; HyPODERmAL cOLORATION uNkNOWN.

Winged female. HIND WINGS AbSENT ( AS IN E. niger AND E. nigricolor ).

Egg ( FIGS 94–96 ). AS cHARAcTERIzED fOR Ephemerythus (SEE AbOvE) ; LENGTH (WITHOuT cAP AND TAIL) AbOuT 0.2 mm; TAIL LENGTH 0.09–0.13 mm. TAIL mucH LONGER THAN IN OTHER SPEcIES (AbOuT ½ Of EGG LENGTH), cONSISTING Of LONG, STOuT POINTED PROcESSES, WHIcH cAN bE fuSED ONE WITH ANOTHER by mEANS Of THIN WALLS; NumbER Of PROcESSES EITHER fOuR ( FIG. 94 ), THREE ( FIG. 95 ) OR TWO ( FIG. 96 ).

Male. UNkNOWN.

Size. BODy LENGTH AbOuT 6 mm.

Comparison. E. gilliesi SP.N. DIffERS fROm E. niger AND E. nigricolor by THE STRucTuRES Of TERGALII, WHIcH ARE SImILAR TO THAT Of E. pictus ; IT DIffERS fROm E. pictus by THE STRucTuRES Of mAXILLAE AND fEmORA, WHIcH ARE SImILAR TO THOSE Of E. niger AND E. nigricolor (SEE TAbLE 1). Ephemerythus gilliesi SP. N. DIffERS fROm ALL OTHER EXAmINED SPEcIES Of Ephemerythus by ITS vERy LONG EGG TAILS ( FIGS 94–96 ) AND by THE PRESENcE Of bLuNT SETAE ON THE POSTERIOR SIDE Of THE fORE TIbIA ( FIG. 89 ).

Figures

FIGURES 88 – 93. Ephemerythus gilliesi sp. n. 88, apex of maxilla (dorSal VieW, dentiSetae dotted; Setae of apical tuft not ShoWn, their baSeS on Ventral Side ShoWn by interrupted lineS); 89, middle part of fore tibia, poSterior VieW (Setae on anterior Side ShoWn by interrupted lineS); 90 – 93, tergalii of abdominal SegmentS II – V. AbbreViationS: dS 1, diStal dentiSeta; dS 2, proximal dentiSeta; i-d, Setae of inner-dorSal roW.

FIGURES 94 – 97. Ephemerythus gilliesi Sp. n. 94 – 96, Well-deVeloped eggS; 97, deVeloping eggS.

FIGURES 14 – 17. Ephemerythus niger: 14, 15, reared male and female imagoeS from Amani (Tanzania); 16, I – VIII abdominal SegmentS of reared male Subimago from RiVer IShaSha (Uganda); 17, the Same of male imago from Mfumbi (Tanzania).

FIGURES 39 – 46. Ephemerythus pictus from Amani. 39, male larVa of penultimate inStar; 40, male larVa of laSt inStar; 41, female larVa of laSt inStar; 42 – 45, tergalii of II – V abdominal SegmentS; 46, maxilla.