Papuanatula (Papuanatula) dumspinae 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 dumspinae

description: Papuanatula (Papuanatula) dumspinae sp. nov.
Figs 38, 39, 40, 41, 42, 43
Etymology.
The species name is based on the Latin words dum spinae meaning “ long spines ”, referring to the long denticles at posterior margins of abdominal terga.
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 00592625; MZB. Paratypes. 40 larvae; same data as holotype; 3 on slides; GBIFCH 00592541, GBIFCH 00592542, GBIFCH 00975787, GBIFCH 00976042; MZL; 37 in alcohol; GBIFCH 00975791, GBIFCH 00975792, GBIFCH 00975794, GBIFCH 00975795, GBIFCH 00976046, GBIFCH 00976047, GBIFCH 00976048, GBIFCH 00976059, GBIFCH 00975830; MZL.
Other material.
Indonesia • 17 larvae; Papua Barat, Tamrau, Mts N of Kebar, sandy sunny riverbank; 00°47'02"S, 133°04'20"E; 758 m; 07. xi. 2013; leg. M. Balke; (BH 032); in alcohol; GBIFCH 00975829; MZL.
Diagnosis.
Larva. The following combination of characters distinguishes P. dumspinae sp. nov. from other species of Papuanatula s. str.: body dorsally with row of long, fine, simple setae along midline; abdominal terga without protuberances; femur basally with wedge-shaped blank, medial area dark grey, distal area yellow-brown; paracercus with eight or nine segments; abdominal terga with very long, narrow, triangular denticles on posterior margins.
Description.
Larva (Figs 38 – 43). Body length 3.8–5.2 mm, cerci much longer than body length (~ 1.5 ×).
Cuticular coloration (Fig. 38 a – c). Head, thorax and abdomen dorsally brown; thorax with complex pattern; abdominal segments II – IV and VII – IX dark brown to black, V, VI and X yellow-brown. Femur basally with wedge-shaped blank, medial area dark grey, distal area yellow-brown; tibia ecru with grey; tarsus and claw grey-brown. Thorax and abdominal segment I ventrally ecru, protuberances of thoracic sterna dark brown, abdominal segments II – X ventrally brown. Cerci grey-brown.
Hypodermal coloration. Each abdominal tergum I – IX with wide dark brown transverse band close to anterior margin and with narrower dark brown transverse band close to posterior margin (Fig. 38 a).
Head. Dorsally with irregular row of long, fine, simple setae along midline. Antenna (Fig. 41 i). Length ~ 1.5 × head length. As typical for subgenus. Developing turbinate eyes in mature male larva (Fig. 41 i) ovoid, with large distance to each other. Labrum (Fig. 39 a, b). Length 0.5 × maximum width, laterally convex. Dorsal, sub-marginal arc with 22–29 feathered setae. Right mandible (Fig. 39 d, e). Margin between prostheca and mola with row of minute denticles. Otherwise, as typical for subgenus. Left mandible (Fig. 39 f, g). Margin between prostheca and mola with row of minute denticles. Otherwise, as typical for subgenus. Hypopharynx (Fig. 39 c). As typical for genus. Maxilla (Fig. 40 c, d). Maxillary palp somewhat shorter than galea-lacinia, robust; palp segment II ~ 1.3 × length of segment I. Otherwise, as typical for genus. Labium (Fig. 40 a, b). As typical for the 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 with minute distomedial protuberance, dorsally with row of four spine-like setae near outer, distolateral margin. Segment III slightly pentagonal, 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). Terga (Fig. 38 b) without protuberances; with row of long, fine, simple setae along midline. Legs (Fig. 41 a – h). 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 1.1: 1.0: 0.3: 0.2. Femur. Length ~ 3.5 × maximum width. Claw with one row of 6–8 denticles and one posterior seta.
Abdomen. Terga (Figs 42 a, 43 a – c) with row of long, fine, simple setae along midline. Terga without protuberances, terga I – IV with slight, paired, medioposterior elevations. Posterior margin of terga: (I) II – IX with long, narrow, triangular, pointed denticles. Surface with scattered small, paddle-like, striated scales with slightly serrate margin. Tergalii (Fig. 42 e, f). Broad ovoid, tracheation well developed; margins smooth, with few short, fine, simple setae. Paraproct (Fig. 42 g, h). Posterior margin with prolongation and row of minute denticles; on surface an area with minute, notched scales. Caudalii (Fig. 42 b – d). Cerci apart from basal and distal part on ¾ of their length with up to ten swimming setae per segment, initially increasing and then again decreasing toward distal part. Paracercus with eight or nine segments.
Pose of subimaginal gonostyli under larval cuticle. Unknown.
Subimago. Unknown.
Imago. Unknown.
Egg. Unknown.
Distribution.
New Guinea (Fig. 146).
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