Papuanatula ( Fijifiliola ) sekawa, Kaltenbach, 2025
Kaltenbach, Thomas, 2025, Mayflies of the Fiji Islands (Ephemeroptera), ZooKeys 1259, pp. 205-276 : 205-276
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publication ID |
https://doi.org/10.3897/zookeys.1259.168521 |
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publication LSID |
lsid:zoobank.org:pub:48F9008F-BC5F-49BA-994A-2142AF2EAE55 |
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DOI |
https://doi.org/10.5281/zenodo.17583278 |
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persistent identifier |
https://treatment.plazi.org/id/E0640DB9-8ED6-5F88-851A-C3932204375F |
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treatment provided by |
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scientific name |
Papuanatula ( Fijifiliola ) sekawa |
| status |
sp. nov. |
Papuanatula ( Fijifiliola) sekawa sp. nov.
Figs 30 View Figure 30 , 31 View Figure 31 , 32 View Figure 32
Material examined.
Holotype. FIJI • larva; Vanua Levu , Cacaudrove Prov., tributary to Sekawa Riv., near Nakawaga; 16 ° 39 ' 55 " S, 179 ° 20 ' 03 " E; 32 m; 29. x. 2024; leg. T. Kaltenbach; on slide; GBIFCH 01581905; MZL GoogleMaps . Paratypes. • 8 larvae; same data as holotype; 3 on slides; GBIFCH 01581904, GBIFCH 01581908, GBIFCH 01221818; 5 in alcohol; GBIFCH 01581902, GBIFCH 01581903; MZL GoogleMaps .
Diagnosis.
Larva. Following combination of characters distinguishes P. sekawa sp. nov. from other species of Fijifiliola subgen. nov.: larva dorsally dark grey, abdominal tergum X reddish brown; femur on anterior side with large grey area in middle part, in basal ⅓ with dark grey, narrow, longitudinal streak in large blank, distal ⅓ reddish brown; labial palp segment III slightly pentagonal; paracercus with 12 segments; cerci with one or two swimming setae per segment in distomedial part.
Description.
Larva (Figs 30 View Figure 30 – 32 View Figure 32 ). Body length 3.6–4.1 mm, cerci broken.
Colouration (Fig. 30 a – c View Figure 30 ). Head, thorax and abdomen dorsally dark grey, thorax with indistinct pattern, fore protoptera dark grey; abdominal tergum I brighter, tergum X reddish brown. Femur on anterior side with large grey area in middle part, in basal ⅓ with dark grey, narrow, longitudinal streak in large blank, distal ⅓ reddish brown; femur on posterior side with dark brown distomedial marking surrounded by reddish brown colour; tibia and tarsus predominantly grey. Thorax and abdomen ventrally grey-brown, sternum X yellow-brown. Caudalii grey.
Head. Antenna (Fig. 31 h View Figure 31 ). Length ~ 1.5 × head length. As typical for subgenus.
Labrum (Fig. 31 a, b View Figure 31 ). Length 0.5 × maximum width. Otherwise, as typical for subgenus.
Right mandible (Fig. 31 f View Figure 31 ). Margin between prostheca and mola straight, with minute denticles. Otherwise, as typical for subgenus.
Left mandible (Fig. 31 e View Figure 31 ). Margin between prostheca and mola slightly concave, with minute denticles toward subtriangular process. Otherwise, as typical for subgenus.
Hypopharynx and superlinguae (Fig. 31 d View Figure 31 ). As typical for subgenus.
Maxilla (Fig. 31 g View Figure 31 ). Maxillary palp slightly longer as galea-lacinia; palp segment II ~ 1.3 × length of segment I. Otherwise, as typical for subgenus.
Labium (Fig. 31 c View Figure 31 ). Paraglossa with two spine-like setae on inner, distolateral margin. Labial palp with segment I approx. as long as 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, 0.6 × length of segment II. Otherwise, as typical for subgenus.
Legs (Fig. 32 a – e View Figure 32 ). Ratio of leg segments: fore leg 1.0: 1.0: 0.4: 0.1, middle leg 1.0: 1.0: 0.3: 0.1 and hind leg 1.1: 1.0: 0.4: 0.1. Femur. Length ~ 3 × maximum width. Setae on outer margin long, flattened, apically pointed. Tibia. With row of short, blunt setae on each side parallel to row of long, fine, simple setae. Claw with one row of nine or ten denticles; one posterior seta. Otherwise, as typical for subgenus.
Abdomen. Terga (Fig. 32 f, g View Figure 32 ). Posterior margin of terga: I smooth, without denticles, II – IX with triangular, pointed denticles.
Tergalii (Fig. 32 h View Figure 32 ). Elongate oval; tracheation well-developed, nearly reaching margins, dark brown; with reddish brown pigmentation around tracheation. Margin with minute denticles and short, fine, simple setae.
Paraproct (Fig. 32 i View Figure 32 ). Posterior margin with prolongation, with split denticles.
Caudalii (Fig. 31 i, j View Figure 31 ). Cerci with 1 or 2 swimming setae per segment in distomedial part. Paracercus with 12 segments.
Pose of subimaginal gonostyli under larval cuticle. Unknown.
Subimago. Unknown.
Imago. Unknown.
Egg. Unknown.
Biological aspects.
Larvae living in run or riffles of medium fast flowing lowland rivers (Fig. 38 a View Figure 38 ).
Etymology.
The species is named after the Sekawa River system in Vanua Levu, where the type locality is.
Distribution.
Fiji: Vanua Levu (Fig. 40 c View Figure 40 ).
| T |
Tavera, Department of Geology and Geophysics |
| MZL |
Musee Zoologique |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Fijifiliola |