taxonID	type	description	language	source
03DC8791022FFF9B6475FCEFF19C1743.taxon	description	(Figs 1, 3 – 4)	en	Hájek, Jiří, Shaverdo, Helena (2024): Two new species of Austrelatus diving beetles from continental Southeast Asia, linking the distribution area of the genus (Coleoptera: Dytiscidae: Copelatinae). Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 64 (2): 243-247, DOI: 10.37520/aemnp.2024.016, URL: https://doi.org/10.37520/aemnp.2024.016
03DC8791022FFF9B6475FCEFF19C1743.taxon	materials_examined	Type locality. Malaysia, Selangor State, Rawang Township, Templer Park Forest Reserve, ca. 03 ° 17 ′ N 103 ° 38 ′ E. Type material. HOLOTYPE: Ô (NHMW), labelled: ‘ MALAYSIA 21. I. 1992 / SELANGOR: Templer / Park N K. L. / leg. Jäch (1) [p] // HOLOTYPE Ô / AUSTRELATUS / mirai sp. nov. / J. Hájek & H. Shaverdo det. 2024 [p, red label] ’. PARATYPES: 1 Ô 2 ♀♀, same label data as holotype (NHMW, NMPC). All paratypes are provided with the respective red printed labels.	en	Hájek, Jiří, Shaverdo, Helena (2024): Two new species of Austrelatus diving beetles from continental Southeast Asia, linking the distribution area of the genus (Coleoptera: Dytiscidae: Copelatinae). Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 64 (2): 243-247, DOI: 10.37520/aemnp.2024.016, URL: https://doi.org/10.37520/aemnp.2024.016
03DC8791022FFF9B6475FCEFF19C1743.taxon	description	Description. Male holotype. Habitus (Fig. 1) elongate oblong oval, broadest in one third of elytral length, dorsally convex; body outline continuous, without angle between base of pronotum and elytra. Dorsal surface submatt. Colouration. Head ferruginous with darker circumocular band; pronotum ferruginous, somewhat darkened along anterior and posterior margin; elytra brown-blackish with paler base; appendages orange; ventral side ferruginous. Head moderately broad, ca. 0.66 × width of pronotum, semicircular. Anterior margin of clypeus indistinctly concave. Antenna with antennomeres long and slender. Reticulation consisting of very weakly impressed, hardly perceptible polygonal isodiametric meshes. Punctation double, consisting of coarse setigerous punctures and fine punctures spread sparsely on surface; row of coarse punctures present alongside inner margin of eyes, several punctures present also in fronto-clypeal depressions. Surface between eyes with several short longitudinal strioles; a few short transverse strioles present also in centre of head. Pronotum strongly transverse (width / length ratio = 2.46), broadest between posterior angles, lateral margins moderately curved. Lateral sides with thin beading except for anterior angles. Reticulation similar to that of head, but even less perceptible. Punctation similar to that of head; rows of coarse setigerous punctures present along anterior margin, close to lateral sides and in shallow basolateral depressions along basal margin. Whole surface of pronotum covered with long longitudinal strioles. Scutellum transversely triangular. Elytra. Base of elytra as broad as pronotal base; lateral margins of elytra slightly diverging in basal third, subparallel in middle third, distinctly narrowing to apex in apical third. Eleven dorsal striae and one submarginal longitudinal stria present on each elytron: all striae beginning at base; striae 1, 3, 5 – 6, 8 and 11 ending subapically; striae 2 and 4 longest, ending close to apex; striae 7, 9 – 10 progressively shorter, the latter ending at apical fourth; submarginal stria long, beginning before elytral mid-length and ending subapically. Reticulation similar to that of head. Punctation consisting of coarse setigerous punctures and very fine sparse punctures; coarse punctures present along elytral striae and lateral margins of elytra. Legs. Protibia broadened anteriorly, club shaped. Pro- and mesotarsomeres 1 – 3 distinctly broadened, with rows of adhesive setae on their ventral side; posterior (outer) protarsal claw slightly broader and more curved than anterior claw. Ventral surface. Prosternum sinuate anteriorly, obtusely keeled medially; rather coarsely punctate; reticulation consisting of fine transverse meshes. Prosternal process shortly lanceolate, in cross-section convex, apex obtuse; process distinctly bordered laterally; reticulation consisting of shallow, hardly perceptible polygonal meshes. Metaventrite with reticulation consisting of transverse polygonal meshes; lateral parts of metaventrite (“ metasternal wings ”) tongue-shaped, slender. Metacoxal lines nearly complete, absent only close to metaventrite. Metacoxal plates covered with rather long, oblique strioles; reticulation consisting of elongate, longitudinal polygonal meshes. Metacoxal processes rounded at posterior margin. Abdominal ventrites I – II with longitudinal strioles; ventrites III – IV with oblique strioles laterally; ventrite V with a few transverse striolae laterally. Tuft of setae present antero-medially on ventrites III – V; ventrite VI with setigerous punctures laterally on either side. Abdominal reticulation consisting of elongate polygonal meshes, longitudinal on ventrites I – II, oblique on ventrite III and transverse on ventrites IV – VI. Punctation consisting of fine, sparsely distributed punctures. Male genitalia. Median lobe of aedeagus in lateral view sickle-shaped, widest after mid-length, then rather subparallel and in apical eighth tapering to pointed apex (Fig. 3 a); in ventral view, indistinctly constricted in two thirds of its length, then tapering to pointed apex (Fig. 3 b); ventral lobe apically pointed, closely pressed from left side to dorsal lobe in ventral view (Fig. 3 b). Paramere narrowly triangular, with basal part broad, laterally rounded; distal part narrow, subparallel, apically with long setae; apical lobe club-shaped (Fig. 4). Female. Identical to male in habitus. Pro- and mesotarsomeres 1 – 3 not dilated, without adhesive setae; proclaws slender. Variability. All specimens of the type series are identical. Small variability can only be seen in extent of longitudinal striolae on pronotum. Measurements. TL: 5.0 – 5.6 mm (mean value: 5.35 ± 0.20 mm); holotype: 5.6 mm. TL-h: 4.5 – 4.9 mm (mean value: 4.75 ± 0.15 mm); holotype: 4.9 mm. MW: 2.3 – 2.5 mm (mean value: 2.45 ± 0.10 mm); holotype: 2.5 mm.	en	Hájek, Jiří, Shaverdo, Helena (2024): Two new species of Austrelatus diving beetles from continental Southeast Asia, linking the distribution area of the genus (Coleoptera: Dytiscidae: Copelatinae). Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 64 (2): 243-247, DOI: 10.37520/aemnp.2024.016, URL: https://doi.org/10.37520/aemnp.2024.016
03DC8791022FFF9B6475FCEFF19C1743.taxon	diagnosis	Differential diagnosis. With rather small body length, more or less unicolour ferruginous colouration and presence of 11 dorsal striae + a submarginal stria on each elytron, the new species is most similar to South Indian Austrelatus boukali (Hendrich & Balke, 1998) and A. davidi (Wewalka, 2017). However, A. mirai sp. nov. can be recognised from those species based on more subparallel habitus, presence of long striolae on pronotum, and different shape of male genitalia. We assume, that the new species is most closely related to several, so far undescribed, Austrelatus species from Borneo Island (J. Hájek et al., unpublished data).	en	Hájek, Jiří, Shaverdo, Helena (2024): Two new species of Austrelatus diving beetles from continental Southeast Asia, linking the distribution area of the genus (Coleoptera: Dytiscidae: Copelatinae). Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 64 (2): 243-247, DOI: 10.37520/aemnp.2024.016, URL: https://doi.org/10.37520/aemnp.2024.016
03DC8791022FFF9B6475FCEFF19C1743.taxon	etymology	Etymology. The new species is dedicated to Miroslav Vít (Chyňava, Czech Republic); the specific epithet is a noun in the genitive case. Collecting circumstances. The species was collected in the ca. 2 – 3 m wide forest stream with bottom of granite stones and much sand between them and some leaf litter (Fig. 7). The altitude was ca. 200 m a. s. l.; there was a primary forest in the stream’s upper reaches (M. A. Jäch, pers. comm.).	en	Hájek, Jiří, Shaverdo, Helena (2024): Two new species of Austrelatus diving beetles from continental Southeast Asia, linking the distribution area of the genus (Coleoptera: Dytiscidae: Copelatinae). Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 64 (2): 243-247, DOI: 10.37520/aemnp.2024.016, URL: https://doi.org/10.37520/aemnp.2024.016
03DC8791022FFF9B6475FCEFF19C1743.taxon	distribution	Distribution. Austrelatus mirai sp. nov. is known only from the type locality in Selangor State, Peninsular Malaysia.	en	Hájek, Jiří, Shaverdo, Helena (2024): Two new species of Austrelatus diving beetles from continental Southeast Asia, linking the distribution area of the genus (Coleoptera: Dytiscidae: Copelatinae). Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 64 (2): 243-247, DOI: 10.37520/aemnp.2024.016, URL: https://doi.org/10.37520/aemnp.2024.016
03DC8791022DFF9C647EFE36F0AE1343.taxon	description	(Figs 2, 5 – 6)	en	Hájek, Jiří, Shaverdo, Helena (2024): Two new species of Austrelatus diving beetles from continental Southeast Asia, linking the distribution area of the genus (Coleoptera: Dytiscidae: Copelatinae). Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 64 (2): 243-247, DOI: 10.37520/aemnp.2024.016, URL: https://doi.org/10.37520/aemnp.2024.016
03DC8791022DFF9C647EFE36F0AE1343.taxon	materials_examined	Type locality. Myanmar, Shan State, SE of Mintaingbin Forest Camp, ca. 20 ° 55.64 ′ N 96 ° 33.63 ′ E. Type material. HOLOTYPE: Ô (NHMW), labelled: ‘ MYANMAR (151) Shan State / SE Mintaingbin Forest Camp / forest pools and in leaf litter / near stream, 17.06.2004 / leg. Shaverdo & Schillhammer [p] // HOLOTYPE Ô / AUSTRELATUS / riberai sp. nov. / J. Hájek & H. Shaverdo det. 2024 [p, red label] ’. PARATYPE: 1 Ô, labelled: ‘ MYANMAR: Shan State / Inle Lake, E-shore, 13.5.1999 / 10 km S Nyaungshwe, 940 m / 20 ° 36.48 ′ N 96 ° 56.53 ′ E / leg. Schillhammer & Schuh (39 c) [p] ’ (NMPC). The paratype is provided with the respective red printed label.	en	Hájek, Jiří, Shaverdo, Helena (2024): Two new species of Austrelatus diving beetles from continental Southeast Asia, linking the distribution area of the genus (Coleoptera: Dytiscidae: Copelatinae). Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 64 (2): 243-247, DOI: 10.37520/aemnp.2024.016, URL: https://doi.org/10.37520/aemnp.2024.016
03DC8791022DFF9C647EFE36F0AE1343.taxon	description	Description. Male holotype. Habitus (Fig. 2) elongate oblong oval, broadest in anterior third of elytral length, dorsally convex; body outline continuous, without angle between base of pronotum and elytra. Dorsal surface submatt. Colouration. Head dark brown, clypeus orange; pronotum dark brown, laterally broadly orange, anterior and posterior margins orange-brown translucent; elytral disc dark brown, with broad, irregularly shaped, basal orange band reaching suture, lateral sides orange; appendages orange; ventral side brown. Head moderately broad, ca. 0.71 × width of pronotum, semicircular. Anterior margin of clypeus indistinctly concave. Antenna with antennomeres long and slender. Reticulation consisting of moderately deeply impressed polygonal isodiametric meshes. Punctation double, consisting of coarse setigerous punctures and fine punctures spread sparsely on surface; row of coarse punctures present alongside inner margin of eyes, several punctures present at frontal level of eyes, and antero-laterally to eyes in fronto-clypeal depressions. Pronotum transverse (width / length ratio = 2.40), broadest before posterior angles, lateral margins moderately curved. Lateral sides with beading very thin and indistinct. Reticulation similar to that of head. Punctation similar to that of head; rows of coarse setigerous punctures present along anterior margin, close to lateral sides, several punctures present also in shallow basolateral depressions along basal margin. Pronotum baso-laterally with several longitudinal strioles. Centre of disc with indistinct median longitudinal smooth line. Scutellum transversely triangular. Elytra. Base of elytra as broad as pronotal base; lateral margins of elytra slightly diverging in basal third, then distinctly narrowing to apex. Four shallowly impressed and fragmented dorsal striae present on each elytron: all striae beginning posterior to base; stria 1 shortest, ending at two thirds of elytral length; striae 2 – 3 longer, ending at three fourths of elytral length; stria 4 beginning more closely to base, apically fragmented, ending at second third of elytral length. Submarginal stria absent. Reticulation similar to that of head and pronotum, but less impressed. Punctation consisting of coarse setigerous punctures and very fine sparse punctures; coarse punctures present along elytral striae and lateral margins of elytra. Legs. Protibia broadened anteriorly, club shaped. Pro- and mesotarsomeres 1 – 3 distinctly broadened, with rows of adhesive setae on their ventral side; posterior (outer) protarsal claw shorter and more curved than anterior claw. Ventral surface. Prosternum sinuate anteriorly, obtusely keeled medially. Prosternal process shortly lanceolate, in cross-section convex, apex obtuse; process distinctly bordered laterally; reticulation imperceptible. Metaventrite with reticulation consisting of transverse polygonal meshes; lateral parts of metaventrite (“ metasternal wings ”) tongue-shaped, slender. Metacoxal lines nearly complete, absent only very close to metaventrite. Metacoxal plates covered with a few long transverse and numerous shorter longitudinal strioles; reticulation consisting of elongate, longitudinal polygonal meshes. Metacoxal processes rounded at posterior margin. Abdominal ventrites I – II with longitudinal strioles; ventrites III – IV with oblique strioles laterally. Tuft of setae present antero-medially on ventrites III – V; ventrite VI with setigerous punctures laterally on either side. Abdominal reticulation consisting of elongate polygonal meshes, longitudinal on ventrites I – II, oblique on ventrite III and transverse on ventrites IV – VI. Punctation consisting of fine, sparsely distributed punctures. Male genitalia. Median lobe of aedeagus in lateral view sickle-shaped, broadest at mid-length, tapering continuously to dorsally bent truncate apex (Fig. 5 a); in ventral view, tapering to left-curved obtusely pointed apex (Fig. 5 b); ventral lobe closely pressed from left side to dorsal lobe in ventral view (Fig. 5 b). Paramere triangular; basal two thirds broad, laterally rounded; distal third slender, with indistinct setation on medial margin; apical lobes club-shaped (Fig. 6). Female. Unknown. Variability. Both specimens of the type series are rather uniform in habitus, reticulation and colouration. They differ slightly in elytral striation – striae are more fragmented in paratype specimen; minor variability can be seen also in shape and size of yellow elytral markings. Measurements. TL: holotype: 4.3 mm; paratype: 4.2 mm. TL-h: holotype: 3.8 mm; paratype: 3.7 mm. MW: holotype and paratype: 1.85 mm.	en	Hájek, Jiří, Shaverdo, Helena (2024): Two new species of Austrelatus diving beetles from continental Southeast Asia, linking the distribution area of the genus (Coleoptera: Dytiscidae: Copelatinae). Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 64 (2): 243-247, DOI: 10.37520/aemnp.2024.016, URL: https://doi.org/10.37520/aemnp.2024.016
03DC8791022DFF9C647EFE36F0AE1343.taxon	diagnosis	Differential diagnosis. The new species can be easily recognised from all other Austrelatus by the combination of small body length, disc of elytra with four longitudinal striae (Fig. 2) and the shape of male genitalia (Fig. 5). It is most similar to Sino-Japanese A. parallelus (Zimmermann, 1920) (see JIANG et al. 2023), but their relationships are presently not clear.	en	Hájek, Jiří, Shaverdo, Helena (2024): Two new species of Austrelatus diving beetles from continental Southeast Asia, linking the distribution area of the genus (Coleoptera: Dytiscidae: Copelatinae). Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 64 (2): 243-247, DOI: 10.37520/aemnp.2024.016, URL: https://doi.org/10.37520/aemnp.2024.016
03DC8791022DFF9C647EFE36F0AE1343.taxon	etymology	Etymology. The new species is dedicated to the late Ignacio Ribera (1963 – 2020), renowned specialist on aquatic beetles; the specific epithet is a noun in the genitive case. Collecting circumstances. The Mintaingbin Forest Camp specimen was among the beetles collected from a deep pool between limestone rocks (size ca. 5 × 3 m, steep banks, water transparent, bottom of limestone gravel covered with leaf litter), small, shallow puddles with leaf litter near it and from the ground among leaf litter in the forest close to a stream, at the altitude ca. 1250 m. The Inle Lake specimen was collected at light.	en	Hájek, Jiří, Shaverdo, Helena (2024): Two new species of Austrelatus diving beetles from continental Southeast Asia, linking the distribution area of the genus (Coleoptera: Dytiscidae: Copelatinae). Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 64 (2): 243-247, DOI: 10.37520/aemnp.2024.016, URL: https://doi.org/10.37520/aemnp.2024.016
03DC8791022DFF9C647EFE36F0AE1343.taxon	distribution	Distribution. Austrelatus riberai sp. nov. is so far known only from two close localities (situated ca. 55 km apart) in Shan State, central Myanmar.	en	Hájek, Jiří, Shaverdo, Helena (2024): Two new species of Austrelatus diving beetles from continental Southeast Asia, linking the distribution area of the genus (Coleoptera: Dytiscidae: Copelatinae). Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 64 (2): 243-247, DOI: 10.37520/aemnp.2024.016, URL: https://doi.org/10.37520/aemnp.2024.016
