Papuanatula (Papuanatula) parvatubera 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 parvatubera

description: Papuanatula (Papuanatula) parvatubera sp. nov.
Figs 103, 104, 105, 106, 107, 108
Etymology.
The species name parvatubera is based on the Latin words parva tubera meaning “ small humps ”, referring to the specific abdominal protuberances.
Material examined.
Holotype. Papua New Guinea • larva; Madang Prov., Highway nr Madang, ford; 05°24'24"S, 145°38'13"E; 80 m; 26. xi. / 2. – 3. xii. 2006; leg. Binatang Boys; (PNG 117); on slide; GBIFCH 00592594; ZSM / SNSB. Paratypes. 12 larvae; same data as holotype; 5 on slides; GBIFCH 00592638, GBIFCH 00592595, GBIFCH 00592534, GBIFCH 00592535, GBIFCH 00976089; MZL; 7 in alcohol; GBIFCH 00975780, GBIFCH 00976088, GBIFCH 00976090, GBIFCH 00976045; MZL.
Diagnosis.
Larva. The following combination of characters distinguishes P. parvatubera sp. nov. from other species of Papuanatula s. str.: body dorsally without row of long, fine, simple setae along midline; abdominal terga (III) IV – VIII medially with small, triangular protuberance, oriented posteriorly, terga II, III and IX sometimes with vestigial protuberances; femur medially with broad, transversal marking and large blanks in basal and distal area; paracercus with seven or eight segments.
Description.
Larva (Figs 103 – 108). Body length 2.8–3.1 mm, cerci somewhat shorter than body length (~ 0.8 ×).
Cuticular coloration (Fig. 103 a – c). Head, thorax and abdomen dorsally brown to grey-brown; thorax with complex pattern; abdominal segments IV and V laterally pale grey-brown, X pale grey-brown. Femur medially with grey-brown transversal marking, basally and distally with large blanks; tibia ecru with grey-brown in medial area; tarsus distally yellow-brown, basally brown. Head, thorax and abdomen ventrally pale brown to brown, protuberances of thoracic sterna dark brown, abdominal segments IX and X beige. Cerci pale grey-brown.
Hypodermal coloration. None (apart from antennal flagellum, as typical for subgenus).
Head. Antenna (Fig. 103 a, c). Length 1.5 × head length. As typical for subgenus. Developing turbinate eyes in last instar male larva (Fig. 106 c) large, nearly touching each other, slightly trapezoid. Labrum (Fig. 104 a, b). Relatively small, length 0.5 × maximum width, laterally convex. Dorsal, sub-marginal arc with ~ 10 feathered setae. Right mandible (Fig. 104 d, e). Margin between prostheca and mola with row of minute denticles. Otherwise, as typical for subgenus. Left mandible (Fig. 104 f, g). Margin between prostheca and mola with row of minute denticles. Otherwise, as typical for subgenus. Hypopharynx (Fig. 104 c). As typical for genus. Maxilla (Fig. 105 c, d). Maxillary palp subequal in length to galea-lacinia, robust; palp segment II ~ 1.3 × length of segment I. Otherwise, as typical for genus. Labium (Fig. 105 a, b). As typical for genus. Paraglossa dorsally with two spine-like setae near inner, distolateral margin. Labial palp with segment I ~ 1.1 × 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 (Figs 106 d, 108 a). With small protuberances on sides of prosternum and close to openings of mesothoracic and metathoracic sternal apodemes. Terga without protuberances. Legs (Figs 106 a, b, 108 b). Ratio of leg segments: fore leg 0.9: 1.0: 0.3: 0.2, middle leg 1.0: 1.0: 0.3: 0.2 and hind leg 0.9: 1.0: 0.3: 0.2. Femur. Length ~ 3 × maximum width. Claw with one row of seven denticles, distalmost denticle with distance to other denticles; one posterior seta.
Abdomen. Terga (Figs 107 a, b, 108 c – f). Terga (III) IV – VIII posteromedially with small, triangular protuberance, oriented posteriorly, terga II, III and IX sometimes with vestigial protuberance. Posterior margin of terga: I – II smooth, without spines; III – IX with short, rounded denticles, apically carrying minute, fine, acute spines. Surface with scattered small, long-triangular, pointed, striated scales. Tergalii (Fig. 107 d). Narrow oblong, tracheation undeveloped; margins smooth, with few short, fine, simple setae. Paraproct (Fig. 107 c). Posterior margin with prolongation and row of minute denticles. Caudalii (Fig. 106 e – g). Cerci in distal 1 / 2 with 1–4 swimming setae per segment. Paracercus with seven or eight segments.
Pose of subimaginal gonostyli under larval cuticle (Fig. 107 e). As typical for the subgenus.
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