Nonnullidens sp. A

Figs 34 H, 56, 57

Material examined.

• Indonesia, Papua, one nymph on slide, GBIFCH 01223145, Road Nabire – Enarotali KM 55, 774 m, 22.X.2011, 03°29.796'S, 135°43.885'E, M. Balke col [PAP 9] (MZL) .

Diagnosis.

Nymph. Labrum trapezoidal; dorsal face of labrum with simple row in distal position; femora pale brown with two transverse dark brown bands in middle and at apex.

Colouration.

Femur yellowish brown, with a large median greyish brown stripe and another one at apex (Fig. 57 A – B). Tibia yellowish. Tarsi yellowish.

Description.

Head. Labrum trapezoid (Fig. 56 A). Ratio labrum width / clypeus width 1.11. Ratio labrum width / insertion width 1.56. Medial emargination narrow with flat denticles. Proximal row of setae present, simple. Number of setae on proximal row ~ 46. Distal row of setae present, simple. Median part of labrum in ventral view with scattered thin setae (Fig. 56 B). Mandibles. Outer margin with row of setae on distal 1 / 2. Ending of the row before incisor. Right mandible with seven setae below the mola (Fig. 56 C). Maxillae. Posterior margin of cardo with few hair-like setae, together with one stout and long seta in submarginal position. Proximo-lateral margin of stipes with a bunch of ~ six stout setae increasing in size distally (Fig. 34 H). Apical-ventral row with 32 pectinate setae. Maxillary palp segment II 0.73–0.78 as long as segment I. Maxillary palp segment III 0.79–0.81 as long as segment I (Fig. 56 D). Stout setae on outer margin of segment I absent. Segment II inner margin with four stout setae, outer margin with four stout setae. Segment III inner margin with six stout setae, dorsal surface with few setae at apex. Segment III 2.36 × as long as base width. Labium. Labial palp segment II 0.79 as long as segment I. Labial palp segment III 0.67 as long as segment I (Fig. 56 E). Segment I inner margin with nine stout setae, outer margin with ten stout setae. Segment II outer margin with five stout setae. Segment III dorsal face with three stout setae. Segment III 3.00 × as long as base width. Hypopharynx. Apex of superlingua truncate (Fig. 56 F).

Thorax. All legs much longer than in any other species of the Thraulus lineage; fore femur 3 × longer than wide (Fig. 57 A), hind femur 4 × longer than wide (Fig. 57 B). Dorsal margin of femur with a row of long, pointed setae; regular submarginal row of blunt setae shorter than those on the dorsal margin; ventral margin with short, pointed setae and an irregular submarginal row of longer, pointed setae; central area of upper surface with few long and short blunt setae. Fore tibia with several rows of long simple or feathered setae on ventral margin, dorsal margin with few hair-like setae; middle tibia with two rows of short, simple, pointed setae on ventral margin, dorsal margin with numerous hair-like setae; hind tibia with two or three rows of long and short feathered and simple setae on ventral margin, outer margin with short, pointed setae and numerous hair-like setae. Tarsal claw hooked with four or five denticles progressively larger apically (Fig. 57 C – D).

Abdomen. Most gills missing. Gill IV very long, uni-lamellate, with 5–6 filaments (Fig. 57 E). Filamentous projections on apex. Posterior margin of terga IX with minute denticles. Posterior margin of terga V – VIII without denticles. Posterolateral projections present on segments VIII – IX.