Papuanatula (Papuanatula) pluresetae 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 pluresetae

description: Papuanatula (Papuanatula) pluresetae sp. nov.
Figs 114, 115, 116, 117, 118, 119, 120
Etymology.
The species name pluresetae is based on the Latin words plures setae meaning “ several setae ” and refers to the three or four posterior setae on the claws.
Material examined.
Holotype. Papua New Guinea • larva; Simbu Prov., Mt. Wilhelm, Pindaunde Creek, S 2 (oria 3); 05°48'03"S, 145°04'09"E; 3210 m; 17. viii. 1999; leg. L. Čížek; on slide; GBIFCH 00592587, GBIFCH 00592588; MZL. Paratypes. 78 larvae; same data as holotype; 6 on slides; GBIFCH 00592548, GBIFCH 00592578, GBIFCH 00592579, GBIFCH 00592589, GBIFCH 00592590, GBIFCH 00592591, GBIFCH 00592592, GBIFCH 01221756; 72 in alcohol; GBIFCH 00976070, GBIFCH 00976100, GBIFCH 00976101, GBIFCH 00976120; MZL • 62 larvae; Simbu Prov., Mt. Wilhelm, Pindaunde Creek, near fish farm, S 4 (oria 5); 05°49'02"S, 145°05'16"E; 2600 m; 18. viii. 1999; leg. L. Čížek; in alcohol; GBIFCH 00976123; MZL • 5 larvae; Simbu Prov., Mt. Wilhelm, Pindaunde Creek, in forest, S 3 (oria 4); 05°49'S, 145°04'30"E; 2900 m; 18. viii. 1999; leg. L. Čížek; in alcohol; GBIFCH 00976116; MZL.
Diagnosis.
Larva. The following combination of characters distinguishes P. pluresetae sp. nov. from other species of Papuanatula s. str.: body dorsally with irregular row of long, fine, simple setae along midline; abdominal terga without protuberances; femur basally with short, wedge-shaped blank; otherwise, brown (after 35 years in alcohol); paracercus vestigial; claw with three or four posterior setae.
Description.
Larva (Figs 114 – 120). Body length 4.5–5.8 mm, cerci much longer than body length (~ 1.3 ×).
Cuticular coloration (Fig. 114 a – c; after 35 years in alcohol). Head, thorax and abdomen dorsally brown. Femur basally with short, wedge-shaped blank; otherwise, brown. Tibia pale brown; tarsus darker brown. Head, thorax, and abdomen ventrally brown. Cerci pale brown.
Hypodermal coloration (Fig. 114 a, b. Abdominal terga I – IX with narrow, dark brown transverse band along posterior margins.
Head. Dorsally with irregular row of long, fine, simple setae along midline (as in Fig. 26 b). Antenna (Fig. 117 e). Length ~ 1.5 × head length. Developing turbinate eyes in last instar male larva (Fig. 117 e) roundish, rather small, with large distance to each other. Labrum (Fig. 115 a, b). Length 0.5 × maximum width, laterally convex. Dorsal, sub-marginal arc with ~ 40 feathered setae. Right mandible (Fig. 115 d, e). Margin between prostheca and mola with row of minute denticles. Otherwise, as typical for subgenus. Left mandible (Fig. 115 f, g). Margin between prostheca and mola with row of minute denticles. Otherwise, as typical for subgenus. Hypopharynx (Fig. 115 c). As typical for genus. Maxilla (Fig. 116 c, d). Maxillary palp subequal in length to galea-lacinia, robust; palp segment II as long as segment I. Otherwise, as typical for genus. Labium (Fig. 116 a, b). 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 four 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 Fig. 108 a). Terga (Fig. 120 a) without protuberances; with irregular row of long, fine, simple setae along midline (as in Fig. 26 b). Legs (Fig. 117 a, d). Ratio of leg segments: fore leg 0.9: 1.0: 0.3: 0.2, middle leg 0.9: 1.0: 0.3: 0.2 and hind leg 1.1: 1.0: 0.4: 0.2. Femur. Length ~ 3 × maximum width. Claw with one row of seven or eight denticles and three or four posterior setae.
Abdomen. Terga (Figs 119 a, 120 b – d) with irregular row of long, fine, simple setae along midline (as in Fig. 26 b). Terga without protuberances, terga I – IV with slight, paired, medioposterior elevations. Posterior margin of terga: I smooth, without denticles; II – IX with triangular, pointed denticles, partly with minute, pointed denticles in between. Surface with scattered small, triangular, pointed, striated scales. Tergalii (Fig. 118 a, b). Ovoid, tracheation poorly developed; margins smooth, with short, fine, simple setae. Paraproct (Fig. 118 c – f). Posterior margin with prolongation and row of minute denticles; on surface an area with notched scales. Caudalii (Fig. 117 f, g). Cerci apart from basal and distal part with 1–4 swimming setae per segment, initially increasing and then again decreasing toward distal part. Paracercus vestigial.
Pose of subimaginal gonostyli under larval cuticle. As typical for the subgenus.
Subimago. Unknown.
Imago. Unknown.
Egg. Unknown.
Distribution.
New Guinea (Fig. 148).
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