Teloganodidae (Allen, 1965)

Sartori, Michel, Peters, Janice G. & Hubbard, Michael D., 2008, A revision of Oriental Teloganodidae (Insecta, Ephemeroptera, Ephemerelloidea), Zootaxa 1957 (1), pp. 1-51 : 47-48

Key to known nymphs of Oriental Teloganodidae

In this key, T. insignis is tentatively placed, although we have not seen any material.

1. Abdominal gills present on segments II–IV (Figs. 95–97), last gill entire; outer margin of hind femora clearly concave ( Fig. 147 ); posterolateral projections on abdomen well developed on segments VI–IX ( Fig. 148 ) ......................................................................................................................... Derlethina eloisae

- Abdominal gills present on segments II–VI (Figs. 82–86) or II–V (Figs. 91–94); outer margin of the hind femora never concave; posterolateral projection on abdomen variable......................................................2

2. Gills present on abdominal segments II–VI; forefemora without a row of transverse setae on dorsal face ( Figs. 59–60 ); teeth of inner incisor of left mandible similar in size ( Fig. 33 )...........................................3

- Gills present on abdominal segments II–V; forefemora with a row of transverse setae on dorsal face (e.g. Fig. 65); teeth of inner incisor of left mandible dissimilar (e.g. Fig. 35 ) ....................................................5

3. Outer margin of forefemora with a dense row of thin setae only ( Fig. 60 ) .................... Teloganodes kodai

- Outer margin of forefemora with a dense row of thin setae and some scattered thick and pointed setae ( Fig. 59 ).......................................................................................................................................................4

4. Labrum ca. 2 times wider than long ( Fig. 16 ); outer margin of mandibles with 2 stout setae ( Figs. 26 , 33 ); outer margin of forefemora with 5–7 thick and pointed setae ( Fig. 59 ) ............... Teloganodes tuberculatus

- Labrum ca. 3 times wider than long; outer margin of mandibles with one stout seta; outer margin of forefemora with 12–15 thick and pointed setae ........................................................... Teloganodes insignis

5. Gill V entire (Fig. 90); outer incisor of the right mandible spoon-shape ( Fig. 27 ); eyes of male nymphs orange brown; tergum X without tubercle...................................................................................................6

- Gill V incised apically (Fig. 94); outer incisor of the right mandible normally built (e.g. Fig. 28 ); eyes of male nymphs black or yellowish; tergum X with a tubercle .......................................................................7

6. Forefemora ca. 2 times longer than wide; outer margin of forefemora with a submarginal row of stout setae ( Fig. 61 ); hypopharynx with superlinguae quadrate ( Fig. 47 ) ........................... Teloganodes jacobusi

- Forefemora ca. 1.3–1.4 times longer than wide; outer margin of forefemora without a submarginal row of stout setae ( Fig. 63 ); hypopharynx with superlinguae oval ( Fig. 48 ) ........................ Teloganodes hubbardi

7. Tarsal claw with at least one subapical tooth ( Fig. 78 )................................................................................8

- Tarsal claw without subapical tooth ( Fig. 80 )............................................................................................10

8. Tarsal claw with 2 well developed subapical teeth ( Fig. 78 ); third segment of labial palp ca. 2.5 longer than wide at base ( Figs. 53, 56 )...................................................................................................................9

- Tarsal claw with inner subapical tooth reduced ( Fig. 79 ); eyes of the male nymph orange-yellowish; third segment of the labial palp more than 3 times longer than wide at base ( Fig. 54 ) ........ Dudgeodes stephani

9. Transverse row on forefemora with both long and stout setae (Fig. 66), apex of outer margin with a single thin seta and inner margin with row of setae ending ca. middle of the margin; a single ventral long seta on inner margin of galea lacinia ( Fig. 41 ); eyes of male nymph black ............................... Dudgeodes hutanis

- Transverse row on forefemora with short, stout setae only (Fig. 70), apex of outer margin with a cluster of thin setae and inner margin with row of setae for most of its length; 2–3 ventral short setae on inner margin of galea lacinia ( Fig. 45 ); eyes of male nymph yellowish brown .............................. Dudgeodes ulmeri

10. Outer margin of foretibiae with scattered setae; row of 4 setae below mola of right mandible ( Fig. 29 ); inner margin of forefemora with a few stout setae distally (Fig. 71) ........................ Dudgeodes pescadori

- Outer margin of foretibiae with a row of setae; row of 7–8 setae below mola of right mandible ( Fig. 30 ); inner margin of forefemora with numerous stout setae in distal half (Fig. 73) ......... Dudgeodes celebensis

Figures

FIGURES 144–149. Holotypes of Dudgeodes and Derlethina in dorsal view (144, 147), abdomen in ventral view (145, 148) and in lateral view (146, 149). Figs. 144–146: Dudgeodes celebensis; Figs. 147–149: Derlethina eloisae

FIGURES 59–64. Forefemur (59, 60, 61, 63) and setae on the transverse row (62, 64) of Teloganodes spp. Insertion of the setae on the margins indicated by dots; only some setae drawn. Fig. 59: T. tuberculatus; Fig. 60: T. kodai; Figs. 61– 62: T. jacobusi; Figs. 63–64: T. hubbardi. Femora at same scale; setae at same scale.

FIGURES 33–39. Left mandible of Oriental Teloganodidae. Fig. 33: Teloganodes tuberculatus; Fig. 34: T. jacobusi; Fig. 35: Dudgeodes hutanis; Fig. 36: D. pescadori (shape of the new mandible in dotted line); Fig. 37: D. celebensis; Fig. 38: D. ulmeri; Fig. 39: Derlethina eloisae. All same scale.

FIGURES 16–25. Labrum (16, 18, 20, 22, 24), with details of the dorsal setae (17, 19, 21, 23, 25), of Oriental Teloganodidae. Insertion of the setae indicated by dots on the labrum. Figs. 16–17: Teloganodes tuberculatus; Figs. 18–19: T. hubbardi; Figs. 20–21: T. jacobusi; Figs. 22–23: Dudgeodes hutanis; Figs. 24–25: Derlethina eloisae. All labra at same scale and all setae at same scale, two times enlarged compared to the labra.

FIGURES 26–32. Right mandible of Oriental Teloganodidae. Fig. 26: Teloganodes tuberculatus; Fig. 27: T. jacobusi; Fig. 28: Dudgeodes hutanis; Fig. 29: D. pescadori (shape of the new mandible in dotted line); Fig. 30: D. celebensis; Fig. 31: D. ulmeri; Fig. 32: Derlethina eloisae. All same scale.

FIGURES 47–58. Hypopharynx (47–49), labium (50) and labial palp (51–58) of Oriental Teloganodidae. Fig. 47: Teloganodes jacobusi (setae on the left superlingua not drawn); Fig. 48: T. hubbardi (half right); Fig. 49: Dudgeodes hutanis (half left); Fig. 50: T. jacobusi; Fig. 51: T. tuberculatus; Fig. 52: T. hubbardi; Fig. 53: D. hutanis; Fig. 54: D. stephani; Fig. 55: D. celebensis; Fig. 56: D. ulmeri; Fig. 57: D. pescadori; Fig. 58; Derlethina eloisae. Hypopharynx at same scale; labium and labial palps at same scale.

FIGURES 77–81. Tarsal claw of Oriental Teloganodidae. Fig. 77: Teloganodes hubbardi; Fig. 78: Dudgeodes hutanis; Fig. 79: D. stephani; Fig. 80: D. celebensis; Fig. 81: Derlethina eloisae. All claws same scale.

FIGURES 40–46. Maxillae (40, 41) and detail of the setae on the apico-ventral part (42–46) of Oriental Teloganodidae. Fig. 40: Teloganodes tuberculatus; Fig. 41: Dudgeodes hutanis; Fig. 42: T. jacobusi; Fig. 43: T. kodai; Fig. 44: D. pescadori; Fig. 45: D. ulmeri; Fig. 46: Derlethina eloisae.