Papuanatula (Papuanatula) lenos Lugo-Ortiz & McCafferty 1999
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 lenos

description: Papuanatula (Papuanatula) lenos Lugo-Ortiz & McCafferty, 1999
Figs 14, 15, 16
Papuanatula lenos. Lugo-Ortiz and McCafferty 1999: 65–66, figs 19–24.
Material examined.
Type locality (‘ additional material’ in original description). Papua New Guinea • 3 larvae; Morobe Prov., Wau, Hospital Cr.; 1150 m; 20. x. 1964; leg. WL and WG Peters; 1 in alcohol; GBIFCH 00976076; 2 on slides; GBIFCH 00592580, GBIFCH 00592533; 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; thorax dorsally without distinct markings; femur anteriorly with hypodermal, large, oblong to drop-shaped, dark brown to purple black marking in basal 1 / 2; paracercus with nine segments (immature larvae 11); paraproct without posterior prolongation;
Description.
Larva (Figs 14 – 16; Lugo-Ortiz and McCafferty 1999: 65–66, figs 19–24). Body length 3.3–4.4 mm, cerci length unknown.
Cuticular coloration (Fig. 14 a). Head, thorax and abdomen dorsally yellow-brown to brown with pattern as in Fig. 14 a, slightly variable; abdominal segments III – VIII with oblique, dark brown lateral markings, partly forming a trough-shaped pattern (segments III, VII, and VIII), segment IV with dark brown crown-like pattern. Legs yellow-brown to brown; Caudalii yellow-brown.
Hypodermal coloration. Abdominal segments I – IX dorsally with transverse stripe on posterior margins (Fig. 14 a). Femur anteriorly with large oblong to drop-shaped, dark brown to purple black marking in basal 1 / 2; posteriorly with long, broad, dark brown to purple black dashes.
Head. Antenna. Length 1.5 × head length. Developing turbinate eyes in last instar male larva unknown. Labrum (Fig. 15 a). Length 0.5 × maximum width, laterally convex. Dorsal, sub-marginal arc with 12–15 feathered setae. Right mandible (Fig. 15 c, d). Margin between prostheca and mola smooth. Otherwise, as typical for subgenus. Left mandible (Fig. 15 e, f). Margin between prostheca and mola smooth, with one spine close to subtriangular process. Otherwise, as typical for subgenus. Hypopharynx (Fig. 15 b). As typical for genus. Maxilla (Fig. 15 h, i). Maxillary palp subequal in length to galea-lacinia; palp segment II subequal in length to segment I. Otherwise, as typical for genus. Labium (Fig. 15 g). As typical for genus. Paraglossa dorsally with one spine-like seta near 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 five spine-like setae near outer, distolateral margin. Segment III bulbous, pointed, 0.8 × length of segment II; inner dorsal margin with few feathered setae.
Thorax. Sterna without protuberances. Terga without protuberances. Legs (Fig. 16 a, b). Ratio of leg segments: fore leg 1.0: 1.0: 0.2: 0.1, middle leg 0.9: 1.0: 0.2: 0.1 and hind leg 1.1: 1.0: 0.3: 0.1. Femur. Length ~ 3 × maximum width. Claw with one row of six or seven denticles, one posterior seta.
Abdomen. Terga (Fig. 16 c). Abdominal terga without protuberances. Posterior margin of terga: I smooth, without denticles; II – IX with triangular, pointed denticles. Tergalii (Fig. 16 e – f) ovoid, tracheation rather poorly developed; margins smooth, with short, fine, simple setae. Paraproct. Posterior margin without prolongation; smooth, without denticles. Caudalii (Fig. 16 d). Paracercus with nine segments, immature larvae up to 11 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