Labiobaetis kui, Kaltenbach & Garces & Gattolliat, 2022
|
publication ID |
https://dx.doi.org/10.3897/zookeys.1123.90308 |
|
publication LSID |
lsid:zoobank.org:pub:13556B2A-BE87-44F6-9A43-FCDAFE1C68CB |
|
persistent identifier |
https://treatment.plazi.org/id/03B09E8B-57E2-40AA-8BAD-911A6D969606 |
|
taxon LSID |
lsid:zoobank.org:act:03B09E8B-57E2-40AA-8BAD-911A6D969606 |
|
treatment provided by |
|
|
scientific name |
Labiobaetis kui |
| status |
sp. nov. |
Labiobaetis kui sp. nov.
Figs 3 View Figure 3 , 4 View Figure 4 , 5c, d View Figure 5 , 6b View Figure 6
Diagnosis.
Larva. Following combination of characters: A) antennal scape without process (Fig. 4g View Figure 4 ); B) dorsal surface of labrum with submarginal arc of 16-18 long, clavate setae (Fig. 3a View Figure 3 ); C) labial palp segment II with an extended, slightly hooked, thumb-like distomedial protuberance (Fig. 3i View Figure 3 ); D) left mandible without setae at apex of mola (Fig. 3e View Figure 3 ); E) fore femur rather slender, length ca 4 × maximum width, dorsal margin with 10-15 curved, spine-like setae (Fig. 4a View Figure 4 ); F) hind protoptera absent; G) six pairs of terga-lii; H) paraproct distally slightly expanded, with 33-38 stout, marginal spines (Fig. 4f View Figure 4 ).
Description.
Larva (Figs 3 View Figure 3 , 4 View Figure 4 , 5c, d View Figure 5 ). Body length ca 4.9 mm. Caudalii broken. Antenna broken.
Colouration (Fig. 5c, d View Figure 5 ). Head, thorax, and abdomen dorsally uniform brown. Head, thorax, and abdomen ventrally light brown. Legs light brown; femur with a brown medial spot, darker on ventral margin, dorsal margin and apex brown. Caudalii light brown.
Antenna (Fig. 4g View Figure 4 ) with scape and pedicel subcylindrical, without distolateral process at scape.
Labrum (Fig. 3a, b View Figure 3 ). Rectangular, length 0.7 × maximum width. Distal margin with medial emargination and a small process. Dorsally with medium, fine, simple setae scattered over surface; submarginal arc of setae composed of 16-18 long, clavate setae. Ventrally with marginal row of setae composed of anterolateral long, feathered setae and medial long, bifid setae; ventral surface with ca three short, spine-like setae near lateral and anterolateral margin.
Right mandible (Fig. 3c, d View Figure 3 ). Incisor and kinetodontium fused. Incisor with five denticles; kinetodontium with three denticles, inner margin of innermost denticle with a row of thin setae. Prostheca robust, apically denticulate. Margin between prostheca and mola slightly convex. Tuft of setae at apex of mola present.
Left mandible (Fig. 3e, f View Figure 3 ). Incisor and kinetodontium fused. Incisor with five denticles; kinetodontium with three denticles. Prostheca robust, apically with small denticles and comb-shaped structure. Margin between prostheca and mola straight, with minute denticles towards subtriangular process. Tuft of setae at apex of mola absent.
Both mandibles with lateral margins almost straight. Basal half with fine, simple setae scattered over dorsal surface.
Hypopharynx and superlinguae (Fig. 3g View Figure 3 ). Lingua approx. as long as superlinguae. Lingua longer than broad; medial tuft of stout setae well developed; distal half laterally expanded. Superlinguae distally almost straight; lateral margin rounded; fine, long, simple setae along distal margin.
Maxilla (Fig. 3h View Figure 3 ). Galea-lacinia ventrally with two simple, apical setae under canines. Inner dorsal row of setae with three denti-setae, distal denti-seta tooth-like, middle and proximal denti-setae slender, bifid. Medially with one pectinate, spine-like seta and three or four medium, simple setae. Maxillary palp 1.2 × as long as length of galea-lacinia; 2-segmented; palp segment II 1.2 × length of segment I; setae on maxillary palp fine, simple, scattered over surface of segments I and II; apex of last segment rounded, with excavation at inner distolateral margin.
Labium (Fig. 3i View Figure 3 ). Glossa basally broad, narrowing toward apex; shorter than paraglossa; inner margin with ca six spine-like setae increasing in length distally; apex with two long and one medium, robust, pectinate setae; outer margin with ca four spine-like setae; ventral surface with fine, simple, scattered setae. Paraglossa subrectangular, curved inward; apex rounded; with three rows of long, robust, distally pectinate setae in apical area and a row of 2-4 medium, simple setae in anteromedial area; dorsally with a row of four or five long, spine-like, simple setae near inner margin. Labial palp with segment I 0.8 × length of segments II and III combined. Segment I ventrally with short, fine, simple setae. Segment II with extended, slightly hooked, thumb-like distomedial protuberance; distomedial protuberance 0.7 × width of base of segment III; ventral surface with short, fine, simple setae; dorsally with two long, spine-like, simple setae near outer margin. Segment III slightly pentagonal; apex rounded, inner apical margin slightly concave; length subequal to width; ventrally covered with short, spine-like, simple setae and short, fine, simple setae.
Hind protoptera absent.
Foreleg (Fig. 4a-c View Figure 4 ). Ratio of foreleg segments 1.3:1.0:0.4:0.2. Femur. Length ca 4 × maximum width. Dorsal margin with 10-15 long, curved, spine-like setae; length of setae 0.23 × maximum width of femur. Apex rounded, with a pair of long, curved, spine-like setae and some short, stout setae. Many stout, lanceolate setae scattered along ventral margin; femoral patch absent. Tibia. Dorsal margin with row of short, stout, apically rounded setae, on apex one longer, spine-like seta. Ventral margin with row of short, curved, spine-like setae, on apex some longer setae and a tuft of fine, simple setae. Anterior surface scattered with stout, lanceolate setae near ventral margin. Patellatibial suture present on basal 1/3 area. Tarsus. Dorsal margin with some fine, simple setae. Ventral margin with row of curved, spine-like setae. Claw with one row of nine or ten denticles; distally pointed; with ca. five stripes; subapical setae absent.
Terga (Fig. 4d View Figure 4 ). Surface with irregular rows of U-shaped scale bases and scattered fine, simple setae. Posterior margin of tergum IV with triangular spines, wider than long.
Tergalii (Fig. 4e View Figure 4 ). Present on segments II-VII. Margins with small denticles intercalating fine simple setae. Tracheae extending from main trunk to inner and outer margins. Tergalius IV as long as length of segments V and 1/3 VI combined. Tergalius VII as long as length of segment VIII.
Paraproct (Fig. 4f View Figure 4 ). Distally slightly expanded, with 33-38 stout, marginal spines. Surface scattered with U-shaped scale bases, fine, simple setae and micropores. Cercotractor with numerous small, marginal spines.
Etymology.
The new species is dedicated to the indigenous Kui people from northeastern Cambodia.
Distribution.
Cambodia (Fig. 6b View Figure 6 ).
Biological aspects.
The specimens were collected from 100 m to 640 m, mostly on littoral gravel.
Type material.
Holotype. Cambodia • larva; Kampong Speu Province, Chambok River, 1.83 Km from Chambok Community; 240 m; 11°21'58"N, 104°06'17"E; 11.07.2018; leg. H. Freitag and J. Garces; on slide; GBIFCH00592702; MZL. Paratypes. Cambodia • 14 larvae; same data as holotype; 1 on slide; GBIFCH00592701; MZL; 13 in alcohol; GenBank ON982737, ON982738; GBIFCH00515681, GBIFCH00829876, GBIFCH00829877, GBIFCH00975577, GBIFCH00975578; MZL • 7 larvae; Kampong Speu Province, waterfall at Kirirom National Park; 640 m; 11°20'26"N, 104°02'14"E; 13.07.2018; leg. H. Freitag and J. Garces; 1 on slide; GBIFCH00592698; RUPP; 6 in alcohol; GBIFCH00975579; MZL • 1 larva; Kampong Speu Province, Kokie waterfall, secondary forest remnants; 110 m; 11°12'11"N, 104°03'49"E; 12.07.2018; leg. H. Freitag and J. Garces; on slide; GBIFCH00592699; RUPP.
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.