Teloganella umbrata Ulmer 1939

Kluge, Nikita J., Selvakumar, C., Sivaramakrishnan, K. G. & Jacobus, Luke M., 2015, Contribution to the knowledge of the mayfly genus Teloganella Ulmer, 1939 (Ephemeroptera: Ephemerelloidea), Zootaxa 4028 (2), pp. 287-295 : 289-291

Teloganella umbrata Ulmer 1939

( Figs 7–12 , 17–21 , 25, 26 )

Teloganella umbrata Ulmer 1939: 517 (♀ imago);

Teloganella umbrata: Wang et al. 1995: 325 (larva, ♂ and ♀ imagoes, egg).

Material examined. MALAYSIA, Pahang, Taman Negera National Park: river Tahan, 500 m lower Lata Berkon Falls (6 km from mouth), 10.II.2005, coll. M. Chertoprud, 1 larva, 1 ♀ subimago with eggs extracted from larva [ ZIN]; western entrance of Taman Negera National Park, 7 km ESE Merapoh, river Relau, 4°40.736'N, 102° 3.395E, 12–13.II.2006, coll. S. Melnitsky, 4 ♂ subimagoes [ ZIN]. Sabah, trib. Moyog R., 11 mi E Panampung, Mile 17, 29.IX.1978, coll. GF & CH Edmunds, 5 ♂ imagoes, 3 ♀ imagoes [ PERC]; Moyog R., 3 mi E Panampung, 28.IX.1978, coll. GF & CH Edmunds, 1 ♂ imago [ PERC]. Mansuncun R., NE Kota Kinabalu, 18.VIII.1972, coll. WM Beck, Jr., 1 larva [ PERC]. West Malaysia, trib. Selangor R., Mile 42, 13.IX.1978, coll. GF & CH Edmunds, 1 larva [ PERC].

Diagnosis. Larva. Second segment of labial palp relatively narrow and long ( Fig. 21 ). Abdominal segment III with relatively well-expressed paired submedian tubercles ( Fig. 20 ); and with posterolateral projections variably, but very weakly expressed on lateral margins ( Figs 7, 8 ), or apparently absent. Ventral lobe of tergalius II with one wide side process on costal branch ( Fig. 9 ); ventral lobe of tergalius III with 2 side processes on costal branch and 3 side processes on anal branch ( Fig 10 ); ventral lobe of tergalius IV with 2 side processes on costal branch and 2 side processes on anal branch ( Fig. 11 ).

Alate stages. Hind wing with costal projection directed anteriorly ( Fig. 26 ). Black hypodermal maculae occupy lesser part of abdomen: terga I–V with few black maculae, with narrow black line medially; median area of terga VI–IX with few black maculae, tinged with rose; median area of sterna without black maculae; process of styliger medially light, with black lateral margins ( Fig. 19 ). Process of styliger narrower than penis ( Fig. 25 ; Wang et al. 1995: Fig. 8 ).

Distribution. Malay Peninsula (western Malaysia: Pahang) (this study); Borneo Island (eastern Malaysia: Sabah; Indonesia: East Kalimantan) ( Wang et al. 1995, Sartori et al. 2003); Sumatra Island ( Ulmer 1939).

Figures

FIGURES 1 – 12. Teloganella, details of larva. 1 – 6, Teloganella indica: 1, right part of posterior margin of metanotum and abdominal terga I – IV (tergalii II – IV removed); 2, left tergalius II (ventral view, tracheae and pigmentation of dorsal lamella not shown); 3, right tergalius III (dorsal lamella at dorsal view, detached ventral lamella at ventral view); 4, left tergalius IV, ventral view; 5, tergalius V; 6, dorsal lamella of right tergalius II, dorsal view. 7 – 12, Teloganella umbrata: 7, 8, left and right lateral sides of abdominal segment III of the same individual; 9 – 12, left tergalii II – V, ventral view (tracheae not shown).

FIGURES 13 – 17. Teloganella, legs of last instar larva before molt, with subimaginal legs visible under larval cuticle. 13 – 16, male larva of T. indica: 13 – 15, left fore, middle and hind legs, dorsal view; 16, tip of tarsus of male fore leg, with subimaginal claws and developing tissues of imaginal claws. 17, T. umbrata, tip of tarsus of female fore leg, with subimaginal claws and developing tissues of imaginal claws.

FIGURES 18 – 24. 18 – 21, Teloganella umbrata; 22 – 24, Teloganella indica. 18, cuticle of subimaginal mesonotum; 19, 22, sterna and terga of subimaginal abdomen with hypodermal coloration; 20, 23, cuticle of abdominal terga III and IV; 21, 24, labium.

FIGURES 25 – 29. 25, 26, Teloganella umbrata: 25, male subimaginal genitals (ventral view); 26, subimaginal hind wing; 27 – 29, Teloganella indica: 27, middle part of posterior margin of abdominal sternum IV of mature larva; 28, subimaginal genitals extracted from this larva (dorsal view); 29, subimaginal hind wing (extracted from this larva and spread on slide).