Papuanatula (Papuanatula) paralenos 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 paralenos

description: Papuanatula (Papuanatula) paralenos sp. nov.
Figs 90, 91, 92, 93, 94, 95, 96
Etymology.
The species name paralenos refers to the morphological similarity with P. lenos.
Material examined.
Holotype. Papua New Guinea • larva; Eastern Highlands Prov., Marawaka, Ande; near 07°01'42"S, 145°49'48"E; 1700–1800 m, 9. xi. 2006, leg. M. Balke & Kinibel; (PNG 87); on slide; GBIFCH 00976054; ZSM / SNSB. Paratypes. 30 in alcohol; same data as holotype; 3 on slides; GBIFCH 00976142, GBIFCH 01221768, GBIFCH 01221769; MZL; 27 in alcohol; GBIFCH 00976019, GBIFCH 00976039, GBIFCH 00976064, GBIFCH 00976065, GBIFCH 00975796, GBIFCH 00975771; MZL.
Other material.
Papua New Guinea • 1 larva; Gulf Prov., Marawaka, Mala; 07°05'40"S, 145°44'28"E; 1400 m; 11. xi. 2006; leg. M. Balke & Kinibel; (PNG 90); in alcohol; GBIFCH 00975772; MZL • 1 larva; Eastern Highlands Prov., Akameku - Brahmin, Bismarck Range; near 05°52'45"S, 145°23'13"E; 1200 m; 24. xi. 2006; leg. M. Balke & Kinibel; (PNG 110); in alcohol; GBIFCH 00976092; MZL • 1 larva; Central Prov., Tapini; 08°20'31"S, 146°59'49"E; 870 m; 29. x. 2007; leg. Kinibel; (PNG 161); in alcohol; GBIFCH 00976093; MZL. • 2 larvae; Morobe Prov., Menyamya, Mt Inji; near 07°14'49"S, 146°01'20"E; 1700 m; 14. xi. 2006; leg. M. Balke & Kinibel; (PNG 96); in alcohol; GBIFCH 00976067; MZL • 1 larva; Enga Prov., Wapanamanda; 05°38'06"S, 143°55'20"E; 1500 m; 6. xii. 2006; leg. M. Balke & Kinibel; (PNG 128); in alcohol; GBIFCH 00976066; MZL • 32 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; 31 in alcohol; GBIFCH 00976125, GBIFCH 00976098, GBIFCH 00976099; 1 on slide; GBIFCH 00592639, GBIFCH 00592640; MZL.
Diagnosis.
Larva. The following combination of characters distinguishes P. lenos from other species of Papuanatula s. str.: body dorsally without row of long, fine, simple setae along midline; body dorsally without protuberances; thorax ventrally without protuberances; pronotum dorsally with large, medial, dark brown marking at anterior margin, and fine, dark brown band along posterior margin; mesothorax with dark brown band along anterior margin; femur anteriorly with large, oblong, red brown to dark brown marking in basal 1 / 2, and pale red brown to dark brown marking in mediodistal area; paracercus with 6–8 segments; paraproct without posterior prolongation.
Description.
Larva (Figs 90 – 96). Body length 4.0– 5.5 mm, cerci much longer than body length.
Cuticular coloration (Figs 90 a – c, 91 a). Head and thorax dorsally yellow-brown to grey-brown; Abdomen dorsally yellow-brown to dark brown; segments II – IV entirely dark brown, or segment IV with dark brown, crown-like marking; segments I – IX with oblique, dark brown to blackish lateral markings. Head and thorax ventrally ecru, abdomen ventrally pale yellow-brown. Legs yellow-brown to brown; Caudalii yellow-brown.
Hypodermal coloration (Figs 90 a – c, 91 a). Pronotum with large, dark brown marking medially at anterior margin and fine, dark brown band along posterior margin; mesothorax with narrow, dark brown band along anterior margin. Abdominal terga I – IX with wide dark brown transverse band close to anterior margin and narrower dark brown transverse band close to posterior margin. Femur anteriorly with large, oblong, red brown to dark brown marking in basal 1 / 2 (somewhat variable in shape), and pale red brown to dark brown marking in mediodistal area; posteriorly with two red-brown to dark brown streaks close to dorsal margin.
Head. Antenna (Fig. 90 a, c). Length ~ 2 × head length. As typical for subgenus. Developing turbinate eyes in last instar male larva (Fig. 93 e) large, subquadrangular, nearly touching each other in the middle. Labrum (Figs 92 a, b, 96 f). Length 0.5 × maximum width, laterally convex. Dorsal, sub-marginal arc with 15–17 feathered setae. Right mandible (Fig. 92 d, e). Margin between prostheca and mola smooth. Otherwise, as typical for subgenus. Left mandible (Fig. 92 f, g). Margin between prostheca and mola smooth, with several spines close to subtriangular process. Otherwise, as typical for subgenus. Hypopharynx (Fig. 92 c). As typical for genus. Maxilla (Fig. 93 c, d). Maxillary palp slightly longer than galea-lacinia; palp segment II slightly shorter than segment I. Otherwise, as typical for genus. Labium (Fig. 93 a, b). As typical for genus. Paraglossa with one spine-like seta on inner, distolateral margin. Labial palp with segment I subequal in length to segments II and III combined. Segment II without distomedial protuberance, dorsally with row of four spine-like setae near outer, distolateral margin. Segment III slightly bulbous, pointed, 0.8 × length of segment II; inner dorsal margin with few feathered setae.
Thorax. Sterna without protuberances. Terga without protuberances. Legs (Fig. 94 a – h). Ratio of leg segments: fore leg 0.9: 1.0: 0.3: 0.1, middle leg 1.0: 1.0: 0.3: 0.1 and hind leg 1.1: 1.0: 0.3: 0.1. Femur. Length ~ 2.6 × maximum width. Many medium, pointed, spine-like setae along ventral margin. Claw with one row of 5–7 denticles, distalmost denticle with distance to other denticles; one posterior seta.
Abdomen. Terga (Figs 95 a – c, 96 a – e). Abdominal terga without protuberances. Posterior margin of terga: I – III smooth, without denticles; IV – IX with triangular, pointed denticles. Surface with scattered small, trapezoid, striated, apically serrate scales. Tergalii (Fig. 93 f, g). Ovoid, tracheation rather poorly developed; costal margin with minute serration and short, fine, simple setae; anal margin smooth, with short, fine, simple setae. Paraproct (Fig. 95 f). Posterior margin without prolongation, smooth, without denticles. Caudalii (Fig. 95 d, e). Cerci without swimming setae; sometimes one or two insertions still present. Paracercus with 6–8 segments.
Pose of subimaginal gonostyli under larval cuticle (Fig. 94 i). As typical for subgenus. Segment III conical.
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