Papuanatula (Papuanatula) webbi, Kaltenbach & Kluge & Gattolliat, 2025

Papuanatula (Papuanatula) webbi sp. nov.

Figs 121 View Figure 121 , 122 View Figure 122 , 123 View Figure 123 , 124 View Figure 124 , 125 View Figure 125 , 126 View Figure 126

Etymology.

The species is dedicated to Jeff Michael Webb (Rhithron Associates, USA), who was contributing to this study in an early phase.

Material examined.

Holotype. Indonesia • larva; Papua Barat, Kebar to Aibogar , slow forest stream; 00°51'45"S, 132°49'48"E; 503 m; 04. xi. 2013; leg. M. Balke: (BH 025); on slide; GBIFCH 01221788 ; MZB GoogleMaps . Paratypes. 16 larvae; same data as holotype; 2 on slide; GBIFCH 01221798 , GBIFCH 01221790 , GBIFCH 01221804 ; MZL; 14 in alcohol; GBIFCH 00975827 , GBIFCH 00975834 , GBIFCH 00975835 , GBIFCH 00975837 , GBIFCH 00975838 , GBIFCH 00975840 , GBIFCH 00975844 , GBIFCH 00975901 ; MZL GoogleMaps .

Diagnosis.

Larva. The following combination of characters distinguishes P. webbi sp. nov. from other species of Papuanatula s. str.: body dorsally without row of long, fine, simple setae along midline; pronotum with pair of small, triangular, apically rounded protuberances near medioposterior margin; fore protoptera with pair of minute protuberances at medioposterior margin; metanotum and abdominal terga I – IX posteromedially with small to medium protuberance, oriented dorsoposteriad; femur with subquadrangular blank in basal area and long, narrow blank along dorsal margin; paracercus with eight segments.

Description.

Larva (Figs 121 View Figure 121 – 126 View Figure 126 ). Body length 2.4–3.2 mm, cerci much longer than body length (~ 1.5 ×).

Cuticular coloration (Fig. 121 a – c View Figure 121 ). Head, thorax and abdomen dorsally brown. Femur grey-brown, with subquadrangular blank in basal area, long, narrow blank along dorsal margin and rounded blank in distal area; tibia and tarsus ecru, in medial area grey-brown. Head, thorax and abdomen ventrally pale brown, protuberances of thoracic sterna brown, abdominal segments II – VIII slightly darker than thorax. Cerci yellow-brown.

Hypodermal coloration (Fig. 121 a, b View Figure 121 ). Abdominal terga I – IX with narrow, dark brown transverse band close to posterior margin.

Head. Antenna (Fig. 121 a – c View Figure 121 ). Length 1.5 × head length. As typical for subgenus. Developing turbinate eyes in last instar male larva (Fig. 123 e View Figure 123 ) rather large, but with distance to each other. Labrum (Fig. 122 a View Figure 122 ). Relatively small, length 0.5 × maximum width, laterally slightly convex. Dorsal, sub-marginal arc with ~ 10 feathered setae. Right mandible (Fig. 122 c, d View Figure 122 ). Margin between prostheca and mola with row of minute denticles. Otherwise, as typical for subgenus. Left mandible (Fig. 122 e, f View Figure 122 ). Margin between prostheca and mola with few minute denticles. Otherwise, as typical for subgenus. Hypopharynx (Fig. 122 b View Figure 122 ). As typical for genus. Maxilla (Fig. 123 c, d View Figure 123 ). Maxillary palp subequal in length to galea-lacinia; palp segment II ~ 1.7 × length of segment I. Otherwise, as typical for genus. Labium (Fig. 123 a, b View Figure 123 ). As typical for the genus. Paraglossa dorsally with two spine-like setae near inner, distolateral margin. Labial palp with segment I ~ 1.2 × length of segments II and III combined. Segment II without distomedial protuberance, dorsally with row of four spine-like setae near outer, distolateral margin. Segment III conical, pointed, 0.7 × length of segment II.

Thorax. Sterna. With small protuberances on sides of prosternum and close to openings of mesothoracic and metathoracic sternal apodemes (as in Fig. 108 a View Figure 108 ). Terga (Figs 124 f – I View Figure 124 , 126 a View Figure 126 ). Pronotum with pair of small, triangular, apically rounded protuberances near posteromedial margin; metanotum posteromedially with small, apically rounded protuberance. Fore protoptera with pair of minute protuberances at medioposterior margin. Hind protoptera (Fig. 124 g View Figure 124 ). Absent, but sometimes with vestiges. Legs (Fig. 124 a – e View Figure 124 ). Ratio of leg segments: fore leg 0.9: 1.0: 0.3: 0.1, middle leg 0.9: 1.0: 0.3: 0.1 and hind leg 1.0: 1.0: 0.4: 0.2. Femur. Length ~ 3 × maximum width. Claw with one row of six denticles; one posterior seta.

Abdomen. Terga (Figs 125 a, b View Figure 125 , 126 b – d View Figure 126 ). Terga I – IX posteromedially with small to medium, apically rounded protuberance, oriented dorsoposteriad. Posterior margin of terga: I – III smooth, without denticles; IV – IX with short, rounded denticles, apically carrying minute, fine, acute spines. Surface with scattered small, spoon-shaped, striated scales. Tergalii (Fig. 125 f View Figure 125 ). Narrow oblong, tracheation with strongly developed trunk, other tracheation poorly developed; margins smooth, with few short, fine, simple setae. Paraproct (Fig. 125 e View Figure 125 ). Posterior margin with prolongation and row of minute denticles. Caudalii (Fig. 125 c, d View Figure 125 ). Cerci without swimming setae, in middle part one or two insertions per segment still visible, and sometimes with a short, rudimentary swimming seta. Paracercus with eight segments.

Pose of subimaginal gonostyli under larval cuticle. Unknown.

Subimago. Unknown.

Imago. Unknown.

Egg. Unknown.

Distribution.

New Guinea (Fig. 148 View Figure 148 ).