Dudgeodes pescadori Sartori, 2008

Sartori, Michel, Peters, Janice G. & Hubbard, Michael D., 2008, A revision of Oriental Teloganodidae (Insecta, Ephemeroptera, Ephemerelloidea), Zootaxa 1957 (1), pp. 1-51 : 39-43

Dudgeodes pescadori Sartori sp. nov.

( Figs. 12, 13 , 29 , 36 , 44 , 57 , 71, 72, 109–114, 135–137)

Teloganodes tristis sensu Ulmer, 1924: 44

Material examined. Holotype: 1 male nymph, Philippines, Luzon, Laguna Prov., Mud springs, Los Banos , 28.IX.1969, Reisen & Basio [ FAMU]

Paratypes: 9 nymphs; same data as holotype [ MZL, of which 1 partially mounted on slide preparation]; 1 female subimago, same locality, but 29.IX.1969 [ FAMU]; 21 nymphs, same locality, but 20-XII-1969 [ FAMU]; 58 nymphs, Philippines, Luzon, Laguna Prov., College, Molawin Creek, 28.VII.1977, C.R. Realon [27 in FAMU, 31 in MZL of which 1 partially mounted on slide preparation]; 3 nymphs, same data, 20-IX- 1969; 11 nymphs, picnic area, Los Banos, 29.IX.1969, Reisen & Basio [ FAMU]; 1 nymph, Molawin Creek, Los Banos, 2.VI.1967. M.L. Pescador [ FAMU]; 3 male imagos, same locality, 7.VI.1967, M. Pescador [ MZL]; 1 male imago, same locality, 13.VI-1967 [ FAMU]; 2 male imagos, Laguna Prov., Balanc Riv., Pagsajam, 3.XI.1967, M.L. Pescador & D. Z. Llamas Jr. [ FAMU]; 1 nymph, Mountain Prov. , Talugin Stream, Talubin Boni, 2.X.1967, M.L. Pescador [ FAMU] .

Other material: 3 male subimagos, 1 female imago, Philippines, Mindanao , Dansalam, 5.II.1915, Boettger [ ZMH]

Description. Nymph

Body length up to 7.0 mm and 6.0 mm, without cerci, in female and male nymphs respectively; cerci length slightly shorter than body length.

General colouration medium brown dorsally and light brown ventrally; thoracic ganglia tinted with purple; general colouration paler in younger nymphs; legs yellowish, with 4-stripe pattern, the outer ones sometimes fused into a single stripe ( Fig. 129 ).

Antennae 1.1 times head width, flagellum with 16–18 articles. Dorsal part of male eyes blackish. Labrum and maxillae similar to those of D. hutanis . Mandibles slender with one thin seta in middle of outer margin; right mandible ( Fig. 29 ) with outer incisor composed of one large and one small tooth, the latter barely visible when mandible is worn; inner incisor with 2 teeth; prostheca reduced, constituted by a bunch of thin setae; a row of 3–4 long and thin setae below mola and some short setae above mola; left mandible ( Fig. 36 ) with outer incisor made of one tooth rounded when new but tabular when worn; inner incisor with 2 teeth inserted transversally, one small and pointed, other large and rounded, prostheca small with a bunch of small setae; no setae below mola. Ventral seta on the maxilla moderately developed ( Fig. 44 ). Hypopharynx with superlinguae moderately broad and ovoid, a row of simple and long setae at apex. Labial palp three-segmented, articulation between segments 1 and 2 clearly visible, constricted on outer margin; segment 3 ca. 2.5 times as long as wide at base ( Fig. 57 ).

Prothorax with 2 rounded tubercles on dorsal face; mesothorax with none. Forefemur (Fig. 71) greatly dilated, ca. 1.3–1.4 times longer than wide; outer margin serrated and covered by stout and long setae, meeting with transverse row across dorsal face (Fig. 72); 4–5 submarginal short and blunt setae along outer margin; inner margin with an expanded row of long and thin setae ending distally with 2–3 short and blunt setae. Foretibia with clearly visible row of long and thin setae on inner margin, but with scattered very thin setae along outer margin. Middle and hind femora similar, more slender, ca. 1.7–1.8 times longer than wide; dorsal and inner margins with a row of long and stout setae. Tibia with a row of long and stout setae on inner margin, and a row of long and thin setae on outer margin. Tarsal claw hooked, bearing 4–5 blunt teeth medially and no pointed teeth subapically; apex of claw with two rows of 2–3 thin setae laterally.

Abdominal terga with a moderately developed median tubercle on segments I–III, more developed on segments IV–V and well developed on segments VI–X ( Fig. 137 ). Posterolateral projections weakly developed on segments II–III, and well developed on segments IV–IX ( Fig. 136 ). Gills as in D. hutanis . Cerci with stout setae every 2–3 segments; setae shorter than length of corresponding segment.

Female subimago. Body length: 6.8 mm; forewing length: 6.5 mm, cerci broken.

General colouration middle to dark brown; head and pronotum greyish brown, mesothorax and wings medium brown; legs yellowish brown, femora with 4 darker longitudinal maculae, as in nymph, coxae of all legs with one blackish dot on dorso-distal part, and one on ventro-distal part. Abdominal terga medium brown, washed with dark brown maculae; sterna uniformly yellowish brown; cerci yellowish at base.

Male imago. Body length: 6.0– 6.5 mm; forewing length: 5.8–6.2 mm

General colouration dark brown. Upper part of eyes well developed and grey. Wings completely translucent, with a brownish marking at base; pterostigmatic area milky. Legs yellowish, femora with characteristic 4 longitudinal maculae; coxae as in female subimago; apex of tibiae with a blackish ring. Foreleg with following proportions: tibia ca. 1.5 times femur length and ca. 1.8 times tarsus length.

Abdomen dark brown, sterna lighter than terga; gonopods, styliger plate and penis yellowish. Cerci whitish with purple banding at junction of each segment.

Forewing ( Fig. 11 ) with pterostigmatic area with 6–8 crossveins. Numerous crossveins throughout wing. Cubital field with 4 intercalary veins; CuP very characteristic, forming almost a right angle near base. Hindwing ( Fig. 12 ) moderately broad, with an acute costal process.

Styliger plate straight to slightly concave ( Fig. 13 ); gonopods 3-segmented, segment 1 ca. same length as segments 2 and 3 combined; segment 1 subcylindrical; segment 2 slightly enlarged at apex; segment 3 elongated, ca. 2.5–3 times as long as broad at base. Penis lobes fused, outer margin convex, i.e. the maximum width about mid length of lobes; a longitudinal groove clearly visible between lobes ( Fig. 13 ).

Egg. Ovoid, ca. 155 µm by 110 µm; chorion without attachment structures ( Fig. 109 ), and uniformly granular ( Fig. 112 ), except for micropyle area, smooth. One micropyle in equatorial area, directed transversally to egg axis ( Fig. 114 ). Polar cap with two kinds of epithema, similar to those of D. hutanis ( Figs. 110, 111, 113 ). No spines present on pole opposite epithema.

Diagnosis. D. pescadori can be separated from the previously described species by the tarsal claw without subapical teeth, the shape of the mandibles, the absence of a well defined row of setae on the outer margin of the foretibiae, and by the whorls of spines on the cerci shorter than the corresponding segment.

Etymology. This species is named in honour of Prof. Manuel (Manny) Pescador (Florida A&M University) good friend and colleague, who collected the beautiful male imagos.

Remark. The winged specimens deposited in ZMH, and identified by Ulmer as Teloganodes tristis Hagen , are preserved in ethanol but are in bad condition, having been dried probably and not well rehydrated. They are referred to here as D. pescadori , mainly on the base of the marking on the coxae and wing venation, similar to those of the type material, especially vein CuP (see also Fig. 19 in Ulmer, 1924).

Figures

FIGURE 9–13. Dudgeodes spp. Fig. 9: Female subimago forewing of Dudgeodes hutanis; Fig. 10: Hindwing of D. hutanis; Fig. 11: Male imago forewing of Dudgeodes pescadori; Fig. 12: Hindwing of D. pescadori; Fig. 13: Genitalia in ventral view of D. pescadori.

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 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 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.

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 126–131. Holotypes of Teloganodes spp. in dorsal view (126, 129), abdomen in ventral view (127, 130) and in lateral view (128, 131). Figs. 126–128: T. jacobusi; Figs. 129–131: T. hubbardi.

FIGURES 132–137. Holotypes of Dudgeodes spp. in dorsal view (132, 135), abdomen in ventral view (133, 136) and in lateral view (134, 137). Figs. 132–134: D. hutanis; Figs. 135–137: D. pescadori

FIGURES 109–114. Egg structure of Dudgeodes pescadori (SEM pictures). Fig. 109: Shape of the egg; Fig. 110: Detail of the polar cap; Fig. 111: Detail of the collar with threads of the epithema; Fig. 112: Detail of the chorion; Fig. 113: Detail of the lateral attachments; Fig. 114: Micropyle area.

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.