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

Papuanatula (Papuanatula) parabessa sp. nov.

Figs 77 View Figure 77 , 78 View Figure 78 , 79 View Figure 79 , 80 View Figure 80 , 81 View Figure 81 , 82 View Figure 82

Etymology.

The species name parabessa refers to the morphological similarity with P. bessa .

Material examined.

Holotype. Papua New Guinea • larva; Madang Prov., Simbai area ; 05°12'42"S, 144°35'31"E; 1800–2400 m; 8. iii. 2007; leg. Kinibel; (PNG 151); on slide; GBIFCH 00592628 ; ZSM / SNSB GoogleMaps . Paratypes. 14 larvae; same data as holotype; 3 on slides; GBIFCH 00976134 , GBIFCH 00976137 , GBIFCH 01221772 ; MZL; 11 in alcohol; GBIFCH 00975778 , GBIFCH 00976055 , GBIFCH 00976068 , GBIFCH 00976135 , GBIFCH 00976136 , GBIFCH 00976138 ; MZL GoogleMaps • 2 larvae; Papua New Guinea; Madang Prov., Simbai area , 05°13'23"S, 144°37'17"E; 1200 m, 10. iii. 2007; leg. Kinibel; (PNG 152); in alcohol; GBIFCH 00975776 , GBIFCH 00976133 ; MZL GoogleMaps • 3 larvae; Enga Prov., Wapanamanda ; 05°38'06"S, 143°55'20"E; 1500 m; 6. xii. 2006; leg. M. Balke & Kinibel; (PNG 128); in alcohol; GBIFCH 00975773 , GBIFCH 00976128 ; MZL GoogleMaps • 8 larvae; Eastern Highlands Prov., Akameku - Brahmin, Bismarck Range ; near 05°52'45"S, 145°23'13"E; 1200 m; 24. xi. 2006; leg. M. Balke & Kinibel; (PNG 110); in alcohol; GBIFCH 00975782 , GBIFCH 00976091 ; MZL GoogleMaps .

Diagnosis.

Larva. The following combination of characters distinguishes P. parabessa sp. nov. from other species of Papuanatula s. str.: body dorsally with row of long, fine, simple setae along midline; metanotum and abdominal terga I – V with medioposterior, broad, paired humps; abdominal terga II – VI with paired, semicircular, dark brown markings; femur grey-brown, basally with wedge-shaped blank, dorsally with submarginal, dark grey-brown streak; paracercus with nine segments.

Description.

Larva (Figs 77 View Figure 77 – 82 View Figure 82 ). Body length 4.2–5.8 mm, cerci much longer than body length (~ 2 ×).

Cuticular coloration (Fig. 77 a – d View Figure 77 ) Head and thorax dorsally grey-brown, with complex pattern. Abdomen dorsally brown, terga V, VI, and X pale brown; terga II – VI with paired, semicircular, dark brown markings; terga VII – IX with small, paired, dark brown spots. Femur grey-brown, basally with wedge-shaped blank, dorsally with submarginal, dark grey-brown streak. Tibia pale grey-brown; tarsus brown. Head, thorax and abdominal segment I ventrally ecru; protuberances of thoracic sterna brown. Abdominal segments II – VI and X yellow-brown, VII – IX brown. Cerci pale brown.

Hypodermal coloration (Fig. 77 a, c View Figure 77 ). Abdominal terga with narrow, dark brown to blackish, transverse band along posterior margin.

Head (Fig. 77 b View Figure 77 ). Dorsally with irregular row of long, fine, simple setae along midline. Antenna (Fig. 80 h View Figure 80 ). Length ~ 1.5 × head length. As typical for genus. Developing turbinate eyes in last instar male larva (Fig. 80 h View Figure 80 ) large, subquadrangular, broadly touching each other. Labrum (Fig. 78 a, b View Figure 78 ). Length 0.5 × maximum width, laterally convex. Dorsal, sub-marginal arc with ~ 32 feathered setae. Right mandible (Fig. 78 d, e View Figure 78 ). Margin between prostheca and mola with few denticles. Otherwise, as typical for subgenus. Left mandible (Fig. 78 f, g View Figure 78 ). Margin between prostheca and mola smooth, without denticles. Otherwise, as typical for subgenus. Hypopharynx (Fig. 78 c View Figure 78 ). As typical for genus. Maxilla (Fig. 79 c, d View Figure 79 ). Maxillary palp subequal in length to galea-lacinia; palp segment II approximately as long as segment I. Otherwise, as typical for genus. Labium (Fig. 79 a, b View Figure 79 ). As typical for the genus. Paraglossa dorsally with two spine-like setae near inner, distolateral margin. Labial palp with segment I 0.9 × length of segments II and III combined. Segment II with minute distomedial protuberance, dorsally with row of five spine-like setae near outer, distolateral margin. Segment III conical, pointed; 0.7 × length of segment II; inner dorsal margin with few feathered setae.

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 77 b View Figure 77 , 81 a View Figure 81 ) with irregular row of long, fine, simple setae along midline. Metanotum with medioposterior, broad, paired humps. Legs (Fig. 88 a – g View Figure 88 ). Ratio of leg segments: fore leg 0.8: 1.0: 0.3: 0.1, middle leg 0.9: 1.0: 0.3: 0.1 and hind leg 1.0: 1.0: 0.3: 0.2. Femur. Length ~ 4 × maximum width. Claw with one row of seven or eight denticles and one posterior seta.

Abdomen. Terga (Figs 77 b View Figure 77 , 81 a, b View Figure 81 , 82 d, e View Figure 82 ) with irregular row of long, fine, simple setae along midline. Terga I – V with medioposterior, broad, paired humps. Posterior margin of terga: I – II smooth, without denticles; III – IX with triangular, apically rounded denticles, partly with minute, pointed denticles in between. Surface with scattered small, ovoid, striated scales. Tergalii (Fig. 81 e, f View Figure 81 ). Ovoid, tracheation well developed; margins smooth, with short, fine, simple setae. Paraproct (Fig. 82 a – c View Figure 82 ). Posterior margin with prolongation and row of minute denticles. Caudalii (Fig. 81 c, d View Figure 81 ). Cerci apart from basal and distal part with 1–5 swimming setae per segment, initially increasing and then again decreasing toward distal part. Paracercus with nine segments.

Pose of subimaginal gonostyli under larval cuticle (Fig. 80 i View Figure 80 ). In mature larva ready to molt to subimago, subimaginal gonostyli packed under larval cuticle in “ Labiobaetis - type ” pose: 2 nd segments directed medially and bent proximally; 3 rd segment directed medially (as continuation of 2 nd segment) and narrowed apically.

Subimago. Unknown.

Imago. Unknown.

Egg. Unknown.

Distribution.

New Guinea (Fig. 147 View Figure 147 ).