Papuanatula (Papuanatula) pilosa Kaltenbach, Kluge & Gattolliat, 2025, sp. nov.
Creators: name: Kaltenbach, Thomas
name: Kluge, Nikita J.
name: Gattolliat, Jean-Luc
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Ephemeroptera
Baetidae
Papuanatula
Papuanatula pilosa

description: Papuanatula (Papuanatula) pilosa sp. nov.
Figs 109, 110, 111, 112, 113
Etymology.
The species name is based on the Latin word pilosus meaning “ hairy ” and refers to the rows of fine setae on inner margin of femur, outer margin of tibia, and laterally on cerci.
Material examined.
Holotype. Indonesia • larva; Papua Prov.; Riv. Je, Loc. Arfak, E of Amber village; 01°06'35"S, 133°56'51"E; 1200 m; 16. vi. 2016; leg. Sumoked and M. Balke; (BH 68); on slide; GBIFCH 00976044; MZB.
Diagnosis.
Larva. The following combination of characters distinguishes P. pilosa sp. nov. from other species of Papuanatula s. str.: body dorsally without row of long, fine, simple setae along midline; abdominal terga I – VIII (IX) with medium, pointed, dorsoposteriorly oriented, medial protuberances; pronotum with paired, medioposterior protuberances; femur with medial, grey marking; inner margin of femur and outer margin of tibia with irregular rows of medium, fine setae; cerci bilaterally with row of short, fine setae; paracercus vestigial; body size 4.5 mm.
Description.
Larva (Figs 109 – 113). Body length 4.5 mm, cerci much longer than body length (~ 1.2 ×).
Cuticular coloration (Fig. 109 a – c). Head, thorax and abdomen dorsally reddish-brown; thorax with complex pattern; abdominal segments I, V – VI and X slightly brighter. Legs reddish-brown; femur medially with darker marking, red-brown in distal area, bright area in basal part. Head and thorax ventrally ecru, protuberances on thoracic sterna darker; abdomen yellow-brown.
Hypodermal coloration (Fig. 109 a, b). Abdominal segments I – IX dorsally with narrow, dark brown, transverse band on posterior margins; intersegmental membranes slightly reddish-grey.
Head. Antenna (Fig. 109 a – c). Length ~ 1.5 × head length. As typical for subgenus. Developing turbinate eyes in last instar male larva unknown. Labrum (Fig. 110 a, b). Length 0.5 × maximum width, laterally convex. Dorsal, sub-marginal arc with ~ 9 feathered setae. Right mandible (Fig. 110 d, e). Margin between prostheca and mola with some minute denticles toward prostheca. Otherwise, as typical for subgenus. Left mandible (Fig. 110 f, g). Margin between prostheca and mola with some minute denticles toward prostheca. Otherwise, as typical for subgenus. Hypopharynx (Fig. 110 c). As typical for genus. Maxilla (Fig. 111 c, d). Maxillary palp slightly longer than galea-lacinia, slender; palp segment II ~ 1.3 × length of segment I. Otherwise, as typical for genus. Labium (Fig. 111 a, b). 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 with slight, broadly rounded, distomedial protuberance, dorsally with row of five spine-like setae near outer, distolateral margin. Segment III slightly pentagonal, pointed, 0.6 × length of segment II.
Thorax. Sterna. With small protuberances on sides of prosternum and close to openings of mesothoracic and metathoracic sternal apodemes (as Fig. 108 a). Terga (Figs 109 b, 113 b). Pronotum with paired, blunt, posteromedial protuberances. Metanotum with medium, pointed, dorsally oriented, medial protuberance. Legs (Fig. 112 a – e). Ratio of leg segments: fore leg 1.0: 1.0: 0.3: 0.1, middle leg 1.1: 1.0: 0.3: 0.1 and hind leg 1.2: 1.0: 0.3: 0.1. Femur. Length ~ 3 × maximum width; inner margin with irregular, dense row of medium, fine setae. Tibia. Outer margin with irregular, dense row of medium, fine setae. Claw with one row of eight or nine denticles and one posterior seta.
Abdomen. Terga (Fig. 113 a, c – f). Terga I – IX with medium, pointed, dorsoposteriorly oriented, medial protuberances. Posterior margin of terga III – IX with variable, triangular, pointed denticles, spaced on terga III – VI. Tergalii (Fig. 111 f, g). Skew ovoid, tracheation well developed; margins smooth, with short, fine, simple setae. Paraproct (Fig. 111 e). Posterior margin membranous, with prolongation and row of minute denticles. Caudalii (Fig. 112 f – h). Cerci without swimming setae, with bilateral rows of minute setae. Paracercus vestigial.
Pose of subimaginal gonostyli under larval cuticle. Unknown.
Subimago. Unknown.
Imago. Unknown.
Egg. Unknown.
Distribution.
New Guinea (Fig. 147).
description: Published as part of Kaltenbach, Thomas, Kluge, Nikita J. & Gattolliat, Jean-Luc, 2025, Redescription of Papuanatula Lugo-Ortiz & McCafferty (Ephemeroptera, Baetidae), with description of a new subgenus and 20 new species, pp. 159-347 in ZooKeys 1227 on pages 159-347, DOI: 10.3897/zookeys.1227.138100