Papuanatula ( Fijifiliola ) bula, Kaltenbach, 2025

Kaltenbach, Thomas, 2025, Mayflies of the Fiji Islands (Ephemeroptera), ZooKeys 1259, pp. 205-276 : 205-276

publication ID	https://doi.org/10.3897/zookeys.1259.168521
publication LSID	lsid:zoobank.org:pub:48F9008F-BC5F-49BA-994A-2142AF2EAE55
DOI	https://doi.org/10.5281/zenodo.17583256
persistent identifier	https://treatment.plazi.org/id/E884A3E2-9D23-51F9-8303-9F86830F8025
treatment provided by	ZooKeys by Pensoft
scientific name	Papuanatula ( Fijifiliola ) bula
status	sp. nov.

Treatment

Papuanatula ( Fijifiliola) bula sp. nov.

Figs 12 View Figure 12 , 13 View Figure 13 , 14 View Figure 14

Material examined.

Holotype. FIJI • larva; Viti Levu , Rewa Prov. , Colo-I-Suva Forest Park, creek near Coloisuva; 18 ° 03 ' 35 " S, 178 ° 28 ' 11 " E; 160 m; 12. xi. 2024; leg. T. Kaltenbach; on slide; GBIFCH 01581921; MZL GoogleMaps . Paratypes. • 5 larvae; same data as holotype; 1 on slide; GBIFCH 01581920; 4 in alcohol; GBIFCH 01581919, GBIFCH 01581955, GBIFCH 01581965; MZL GoogleMaps • 6 larvae; Viti Levu , Serua Prov. , Biausevu Riv., near Biausevu; 18 ° 10 ' 57 " S, 177 ° 44 ' 13 " E; 70 m; 10. xi. 2024; leg. T. Kaltenbach; 2 on slides; GBIFCH 01581982, GBIFCH 01221827; 4 in alcohol; GBIFCH 01581979, GBIFCH 01581980, GBIFCH 01581981, GBIFCH 01582014; MZL GoogleMaps • 1 larva; Viti Levu , Ba Prov., creek, near Outback Hotel; 17 ° 38 ' 12 " S, 177 ° 45 ' 29 " E; 157 m; 25. x. 2024; leg. T. Kaltenbach; in alcohol; GBIFCH 01581913; MZL GoogleMaps • 5 larvae; Viti Levu , Ba Prov., creek, near Outback Hotel; 17 ° 38 ' 22 " S, 177 ° 45 ' 30 " E; 220 m; 25. x. 2024; leg. T. Kaltenbach; in alcohol; GBIFCH 01581915, GBIFCH 01581914; MZL GoogleMaps .

Diagnosis.

Larva. Following combination of characters distinguishes P. bula sp. nov. from other species of Fijifiliola subgen. nov.: femur basally with narrow dark brown to red-brown, longitudinal streak in large blank; abdominal terga II, VII, VIII dark brown, I, III – V, IX, X brighter, washy grey-brown; labial palp segment III slightly pentagonal; paracercus with 13–15 segments; cerci in middle part with one medium swimming seta each 2 nd segment (Fig. 13 j View Figure 13 ).

Description.

Larva (Figs 12 View Figure 12 – 14 View Figure 14 ). Body length 2.9–4.5 mm, cerci ~ 1.4 × body length.

Colouration (Figs 12 a – c View Figure 12 , 13 l View Figure 13 ). Head dorsally brown, with dark brown markings; thorax dorsally dark brown; abdominal terga II, VII, VIII dark brown, I, III – V, IX, X brighter, washy grey-brown. Legs grey-brown; femur on anterior side in basal part with narrow dark brown to red-brown, hypodermal, longitudinal streak in large blank; medially with indistinct, broad, dark grey band; in distal area reddish brown; femur of all legs on posterior side reddish brown in distal ⅓, with one or two parallel, dark brown, hypodermal, longitudinal streaks. Head, thorax and abdomen ventrally grey to dark grey, sternites VI – VIII darker. Caudalii grey.

Head. Antenna (Fig. 13 l View Figure 13 ). Length ~ 1.5 × head length. As typical for subgenus.

Labrum (Fig. 13 a, b View Figure 13 ). Length 0.6 × maximum width. Otherwise, as typical for subgenus.

Right mandible (Fig. 13 f View Figure 13 ). Margin between prostheca and mola slightly convex, smooth. Otherwise, as typical for subgenus.

Left mandible (Fig. 13 e View Figure 13 ). Margin between prostheca and mola straight, with few denticles toward subtriangular process. Otherwise, as typical for subgenus.

Hypopharynx and superlinguae (Fig. 13 d View Figure 13 ). As typical for subgenus.

Maxilla (Fig. 13 g, h View Figure 13 ). Maxillary palp approx. as long as galea-lacinia; palp segment II ~ 1.2 × longer than segment I. Otherwise, as typical for subgenus.

Labium (Fig. 13 c View Figure 13 ). Paraglossa with one or two spine-like setae on inner, distolateral margin. Labial palp with segment I subequal to length of segments II and III combined. Segment II dorsally with row of four or five spine-like setae near outer, distolateral margin. Segment III slightly pentagonal, 0.7 × length of segment II. Otherwise, as typical for subgenus.

Legs (Fig. 14 a – f View Figure 14 ). Ratio of leg segments: fore leg 1.0: 1.0: 0.4: 0.2, middle leg 1.0: 1.0: 0.4: 0.2 and hind leg 1.1: 1.0: 0.4: 0.2. Femur. Length ~ 3 × maximum width. Setae on outer margin long, flattened, pointed. Tibia. With one row of short, blunt setae on each side of row of long, fine, simple setae. Claw with one row of 11 or 12 denticles; one posterior seta. Otherwise, as typical for subgenus.

Abdomen. Terga (Fig. 14 g, h View Figure 14 ). Posterior margin of terga: I smooth, without denticles; II with rudimentary denticles in middle part, III – IX with triangular, pointed denticles.

Tergalii (Fig. 14 i View Figure 14 ). Elongate oval; tracheation well-developed, not reaching margins, brown; margin smooth, without setae.

Paraproct (Fig. 14 j View Figure 14 ). Posterior margin with prolongation, with split denticles.

Caudalii (Fig. 13 i – k View Figure 13 ). Cerci in middle area with one swimming seta each 2 nd segment, distally up to three swimming setae per segment. Paracercus with 13–15 segments.

Pose of subimaginal gonostyli under larval cuticle. Unknown.

Subimago. Unknown.

Imago. Unknown.

Egg. Unknown.

Biological aspects.

Larvae living in run of medium fast to fast flowing rivers with both, pristine water (Fig. 37 c, d View Figure 37 ) or influenced by human activities (Fig. 37 a View Figure 37 ).

Etymology.

The species name refers to the Fijian word “ bula ”, meaning hello or welcome, which you hear everywhere from the friendly people in Fiji.

Distribution.

Fiji: Viti Levu (Fig. 39 d View Figure 39 ).