Teloganodes (Derlethina) tamiraparaniae ( Selvakumar et al. 2014 ), 2023

Kluge, Nikita, Srinivasan, Pandiarajan, Sivaruban, T., Barathy, S. & Isack, Rajasekaran, 2023, Indian species of Teloganodes Eaton 1882 (including subgenera Dudgeodes Sartori 2008 and Derlethina Sartori 2008) (Ephemeroptera, Teloganodidae), Zootaxa 5244 (6), pp. 553-587 : 580-582

Teloganodes (Derlethina) tamiraparaniae ( Selvakumar et al. 2014) , comb. n.

( Figs 137–161 )

Derlethina tamiraparaniae Selvakumar, Sivaramakrishnan & Jacobus in Selvakumar, Sivaramakrishnan, Jacobus, Janarthanan & Arumugam 2014: 99 (larva).

Material examined. INDIA, state Kerala, Kottayam district, Erumeli, river Manimala , 20–23.I.2016, coll. N. Kluge & L. Sheyko: L-S-IJ, LJ, L ♀ /O ( ZIN) . State Tamilnadu, 3 mature nymphs, India, Tamilnadu, Tirunelveli , Gadana River , 8°80.61′N, 77°30.79′E, ca. 155 m, 18.IX.2021, coll. P. Srinivasan & R . Isack: 3 larvae ( AMC ZN 188 , 189 ) .

Descriptions

Larva. Described by Selvakumar et al. (2014). Additional characters: Labrum with simple setae forming transverse field all over labrum width, with feathered setae located distad of this field. Abdominal terga without bifurcate setae [in contrast to T. (D.) eloisae ]; terga I–IV nearly without setae; tergum V with few hair-like setae on posterior margin submedially; tergum VI with pair of rows of longer setae; tergum VII with few larger pointed setae, terga VIII–IX with few setae and few small denticles on posterior margins ( Figs 141–142 ). Setae on lateral margins of abdominal segments VII–IX long and slender, on posterolateral spines of these segments short and stout ( Fig. 137 ). Posterior margin of sternum IX evenly convex (in male with small protogonostyli by sides) ( Fig. 137 ). Tergalii III–IV stretched anteriorly, each with cleft on apex ( Figs. 18–19 ) [in contrast to T. (D.) eloisae , which has no cleft on tergalius IV]; tergalii II–III with two-branched ventral lobe, tergalius IV without ventral lobe.

Subimago, male. CUTICULAR COLORATION. Pronotum light brown. Mesonotum with anterior scutal chromozone and latero-posterior scutal chromozones light brownish, achromozone of the same color ( Fig. 158 ). Thoracic pleura and sterna with light brown and colorless areas. Wings brown. On fore leg, femur with longitudinal dark brown and colorless bands; tibia darkened with light brownish near base; 2nd–4th tarsomeres darker than tibia, 1st and 5th tarsomeres ( Fig. 149 ). Middle and hind legs lighter ( Fig. 150 ). Abdominal terga and cerci light brown, abdominal sterna lighter. Male genitalia— Fig. 159 .

HYPODERMAL COLORATION. As in imago.

Imago, male. Head brown; dorsal eyes reddish; thorax brown with membranes ochre ( Fig. 145 ). Fore wing with base light brownish, other membrane colorless; veins C, Sc, RA and costal brace partly colorless, partly bordered with dark brown; other longitudinal veins mostly colorless; crossveins colorless ( Fig. 151 ); crossveins of pterostigma either simple or branched, complete or incomplete ( Fig. 152 ). Hind wing with costal projection near midlength (now lost; protoptera— Figs 155–156 ). On foreleg, femur brownish-ochre; tibia mostly ochre, with dark brown macula at base; 2nd–4th tarsomeres gray, 5th tarsomere lighter ochre ( Fig. 147 ). On middle and hind legs, femur mostly ochre with brown marking on extreme apex; tibia mostly ochre, with dark brown macula at base; tarsus ochre ( Fig. 148 ). Abdominal terga with dark with blackish, reddish-brown and light ochre maculae; abdominal sterna ochre ( Fig. 146 ). Styliger and penis light ochre-brownish, gonostyli ochre ( Fig. 160 ). Penis as long as gonostylus, slender, narrowed proximad of middle ( Fig. 160 ), with apices pressed together and common unpaired gonopore exposed dorsally ( Fig. 161 ).

Imago, female. Unknown.

Egg. Unknown.

Figures

FIGURES 137–140. Teloganodes (Derlethina) tamiraparaniae, larval exuviae. 137, end of abdomen, ventral view; 138–140, fore, middle and hind legs.

FIGURES 141–144. Teloganodes (Derlethina) tamiraparaniae, larval exuviae. 141, abdominal sterna and terga; 142, posterior margin of tergum VI; 143–144, pronotum and mesonotum.

FIGURES 145–150. Teloganodes (Derlethina) tamiraparaniae. 145, head and thorax of male imago; 146, abdominal terga and sterna of male imago; 147–148, fore and middle legs of male imago; 149–150, subimaginal exuviae of fore and middle legs of male.

FIGURES 151–156. Teloganodes (Derlethina) tamiraparaniae. 151–152, fore wing of male imago, in falling and transmitted light; 153–154, larval fore protopteron with well-visible veins in pterostigma; 155–156, hind protoptera of two individuals.

FIGURES 157–161. Teloganodes (Derlethina) tamiraparaniae. 157–158, exuviae of subimaginal mesonotum (in dry condition and in Canadian balsam); 159, exuviae of male subimaginal genitalia; 160, genitalia of male imago, ventral view; 161, penis in dorsal view.Abbreviations:acz, achromozone; cz.a, anterior chromozone; cz.l-p, latero-posterior chromozone; cz.s, chromozonal suture; gp, gonopore; LPs, lateroparapsidal suture; MPs, medioparapsidal suture; MS, medioscutum; SMS, submedioscutum.

FIGURES 1–19. Tergalii of Teloganodes with ventral lobe turned out. 1–6, tergalii II–VI of T. (Teloganodes) velutinus sp. n. (5 and 6, tergalii VI of the same individual); 7–12, tergalii II–VI of T. (T.) dentatus (11 and 12, tergalii VII of different individuals); 13–16, tergalii II–V of T. (Dudgeodes) palnius; 17–19, tergalii II–IV of T. (Derlethina) tamiraparaniae.