Papuanatula (Papuanatula) paratuber 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 paratuber

description: Papuanatula (Papuanatula) paratuber sp. nov.
Figs 97, 98, 99, 100, 101, 102
Etymology.
The species name paratuber refers to the morphological similarity with P. tuber.
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 01221783; MZB. Paratypes. 38 larvae; same data as holotype; 3 on slides; GBIFCH 00976113, GBIFCH 01221784; GBIFCH 01221803; 35 in alcohol; GBIFCH 00976053, GBIFCH 00976112, GBIFCH 00976114, GBIFCH 00976062; GBIFCH 00975823, GBIFCH 00975824, GBIFCH 00975831; MZL.
Diagnosis.
Larva. The following combination of characters distinguishes P. paratuber 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 without protuberances; femur with medial, grey marking; paracercus vestigial; body size 4.3–5.2 mm.
Description.
Larva (Figs 97 – 102). Body length 4.3–5.2 mm, cerci much longer than body length (~ 1.3 ×).
Cuticular coloration (Fig. 97 a – d). Head, thorax and abdomen dorsally brown or grey-brown; thorax with complex pattern; abdominal segments II – IV and VII – IX darker, V – VI and X brighter. Legs grey to yellow-brown; femur medially with grey marking, yellow-brown in distal area, blank area in basal part. Head and thorax ventrally pale grey, protuberances on thoracic sterna darker; abdomen yellow-brown to grey, sterna VII and VIII darker.
Hypodermal coloration (Fig. 97 a, b). Abdominal segments I – IX dorsally with dark brown, narrow, transverse band on posterior margins; intersegmental membranes slightly reddish-grey.
Head. Antenna (Fig. 100 h). Length 1.5 × head length. As typical for subgenus. Developing turbinate eyes in last instar male larva (Fig. 100 h) large, sub quadrangular, nearly touching each other in the middle. Labrum (Fig. 98 a, b). Length 0.5 × maximum width, laterally convex. Dorsal, sub-marginal arc with ~ 9 feathered setae. Right mandible (Fig. 98 d, e). Margin between prostheca and mola smooth. Otherwise, as typical for subgenus. Left mandible (Fig. 98 f, g). Margin between prostheca and mola smooth. Otherwise, as typical for subgenus. Hypopharynx (Fig. 98 c). As typical for genus. Maxilla (Fig. 99 c, d). Maxillary palp ~ 1.2 × length of galea-lacinia; palp segment II ~ 1.1 × length of segment I. Otherwise, as typical for genus. Labium (Fig. 99 a, b). As typical for 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 four spine-like setae near outer, distolateral margin. Segment III slightly pentagonal, pointed, 0.8 × 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 (Fig. 102 a, d). Pro-, meso- and metanotum without protuberances. Legs (Fig. 100 a – e). Ratio of leg segments: fore leg 0.9: 1.0: 0.4: 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 ~ 3.4 × maximum width; inner margin with short, spine-like setae along margin. Claw with one row of five or six denticles and one posterior seta.
Abdomen. Terga (Figs 101 a, b, 102 a – c, e). Terga I – VIII with medium, pointed, dorsoposteriorly oriented, medial protuberances. Posterior margin of terga: I smooth, without denticles; II with rudimentary denticles; III – IX with small, triangular denticles, apically sometimes split. Tergalii (Fig. 101 c, d). Ovoid, tracheation mainly limited to trunk; margins smooth, with short, fine, simple setae. Paraproct (Fig. 101 e). Posterior margin with prolongation and row of minute denticles. Caudalii (Fig. 100 f, g). Cerci without swimming 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