Papuanatula (Papuanatula) parvatubera, Kaltenbach & Kluge & Gattolliat, 2025

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, ZooKeys 1227, pp. 159-347 : 159-347

publication ID	https://doi.org/10.3897/zookeys.1227.138100
publication LSID	lsid:zoobank.org:pub:F259B26F-4DA1-452E-ABEE-7D0957CFE261
DOI	https://doi.org/10.5281/zenodo.14852591
persistent identifier	https://treatment.plazi.org/id/43ABA01C-E8F5-5DD4-A468-D4334657B92B
treatment provided by	ZooKeys by Pensoft (2025-02-11 18:24:55, last updated 2025-02-13 16:30:11)
scientific name	Papuanatula (Papuanatula) parvatubera
status	sp. nov.

Treatment

Papuanatula (Papuanatula) parvatubera sp. nov.

Figs 103 View Figure 103 , 104 View Figure 104 , 105 View Figure 105 , 106 View Figure 106 , 107 View Figure 107 , 108 View Figure 108

Etymology.

The species name parvatubera is based on the Latin words parva tubera meaning “ small humps ”, referring to the specific abdominal protuberances.

Material examined.

Holotype. Papua New Guinea • larva; Madang Prov., Highway nr Madang , ford; 05°24'24"S, 145°38'13"E; 80 m; 26. xi. / 2. – 3. xii. 2006; leg. Binatang Boys; (PNG 117); on slide; GBIFCH 00592594 ; ZSM / SNSB GoogleMaps . Paratypes. 12 larvae; same data as holotype; 5 on slides; GBIFCH 00592638 , GBIFCH 00592595 , GBIFCH 00592534 , GBIFCH 00592535 , GBIFCH 00976089 ; MZL; 7 in alcohol; GBIFCH 00975780 , GBIFCH 00976088 , GBIFCH 00976090 , GBIFCH 00976045 ; MZL GoogleMaps .

Diagnosis.

Larva. The following combination of characters distinguishes P. parvatubera sp. nov. from other species of Papuanatula s. str.: body dorsally without row of long, fine, simple setae along midline; abdominal terga (III) IV – VIII medially with small, triangular protuberance, oriented posteriorly, terga II, III and IX sometimes with vestigial protuberances; femur medially with broad, transversal marking and large blanks in basal and distal area; paracercus with seven or eight segments.

Description.

Larva (Figs 103 View Figure 103 – 108 View Figure 108 ). Body length 2.8–3.1 mm, cerci somewhat shorter than body length (~ 0.8 ×).

Cuticular coloration (Fig. 103 a – c View Figure 103 ). Head, thorax and abdomen dorsally brown to grey-brown; thorax with complex pattern; abdominal segments IV and V laterally pale grey-brown, X pale grey-brown. Femur medially with grey-brown transversal marking, basally and distally with large blanks; tibia ecru with grey-brown in medial area; tarsus distally yellow-brown, basally brown. Head, thorax and abdomen ventrally pale brown to brown, protuberances of thoracic sterna dark brown, abdominal segments IX and X beige. Cerci pale grey-brown.

Hypodermal coloration. None (apart from antennal flagellum, as typical for subgenus).

Head. Antenna (Fig. 103 a, c View Figure 103 ). Length 1.5 × head length. As typical for subgenus. Developing turbinate eyes in last instar male larva (Fig. 106 c View Figure 106 ) large, nearly touching each other, slightly trapezoid. Labrum (Fig. 104 a, b View Figure 104 ). Relatively small, length 0.5 × maximum width, laterally convex. Dorsal, sub-marginal arc with ~ 10 feathered setae. Right mandible (Fig. 104 d, e View Figure 104 ). Margin between prostheca and mola with row of minute denticles. Otherwise, as typical for subgenus. Left mandible (Fig. 104 f, g View Figure 104 ). Margin between prostheca and mola with row of minute denticles. Otherwise, as typical for subgenus. Hypopharynx (Fig. 104 c View Figure 104 ). As typical for genus. Maxilla (Fig. 105 c, d View Figure 105 ). Maxillary palp subequal in length to galea-lacinia, robust; palp segment II ~ 1.3 × length of segment I. Otherwise, as typical for genus. Labium (Fig. 105 a, b View Figure 105 ). As typical for 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 without distomedial protuberance, dorsally with row of four spine-like setae near outer, distolateral margin. Segment III conical, pointed, 0.7 × length of segment II.

Thorax. Sterna (Figs 106 d View Figure 106 , 108 a View Figure 108 ). With small protuberances on sides of prosternum and close to openings of mesothoracic and metathoracic sternal apodemes. Terga without protuberances. Legs (Figs 106 a, b View Figure 106 , 108 b View Figure 108 ). Ratio of leg segments: fore leg 0.9: 1.0: 0.3: 0.2, middle leg 1.0: 1.0: 0.3: 0.2 and hind leg 0.9: 1.0: 0.3: 0.2. Femur. Length ~ 3 × maximum width. Claw with one row of seven denticles, distalmost denticle with distance to other denticles; one posterior seta.

Abdomen. Terga (Figs 107 a, b View Figure 107 , 108 c – f View Figure 108 ). Terga (III) IV – VIII posteromedially with small, triangular protuberance, oriented posteriorly, terga II, III and IX sometimes with vestigial protuberance. Posterior margin of terga: I – II smooth, without spines; III – IX with short, rounded denticles, apically carrying minute, fine, acute spines. Surface with scattered small, long-triangular, pointed, striated scales. Tergalii (Fig. 107 d View Figure 107 ). Narrow oblong, tracheation undeveloped; margins smooth, with few short, fine, simple setae. Paraproct (Fig. 107 c View Figure 107 ). Posterior margin with prolongation and row of minute denticles. Caudalii (Fig. 106 e – g View Figure 106 ). Cerci in distal 1 / 2 with 1–4 swimming setae per segment. Paracercus with seven or eight segments.

Pose of subimaginal gonostyli under larval cuticle (Fig. 107 e View Figure 107 ). As typical for the subgenus.

Subimago. Unknown.

Imago. Unknown.

Egg. Unknown.

Distribution.

New Guinea (Fig. 147 View Figure 147 ).

Figures

Figure 103. Papuanatula (Papuanatula) parvatubera sp. nov., larva, habitus: a dorsal view b lateral view c ventral view. Scale bars: 1 mm.

Figure 104. Papuanatula (Papuanatula) parvatubera sp. nov., larva: a labrum b labrum: dorsal, submarginal setae c hypopharynx and superlinguae d right mandible e right mandible: margin between prostheca and mola f left mandible g left mandible: margin between prostheca and mola. Scale bars: 10 µm (a – c); 20 µm (d, f).

Figure 105. Papuanatula (Papuanatula) parvatubera sp. nov., larva: a labium b labial palp c maxilla d maxillary palp. Scale bars: 20 µm (a, c); 10 µm (b, d).

Figure 106. Papuanatula (Papuanatula) parvatubera sp. nov., larva: a hind leg b middle tarsus and claw (arrow: posterior seta) c male head, mature d prosternum e paracercus f cercus, dorsal view g cercus, lateral view. Scale bars: 50 µm (a); 10 µm (b, f, g); 100 µm (c); 20 µm (d, e).

Figure 107. Papuanatula (Papuanatula) parvatubera sp. nov., larva: a abdominal terga III – V b abdominal tergum V (arrows: minute, acute spines) c paraproct d tergalius IV e developing gonostyli. Scale bars: 20 µm (a); 10 µm (b – e).

Figure 108. Papuanatula (Papuanatula) parvatubera sp. nov., larva (SEM): a pro-, meso-, and metasternum (arrows: protuberances) b hind claw c abdominal terga III – V d abdominal terga VII – X e abdominal tergum IV f abdominal tergum VIII. Scale bars: 200 µm (a); 40 µm (b); 100 µm (c, d); 30 µm (e); 20 µm (f).