Thysanarthria ceylonensis Hebauer, 2001

Fikáček, Martin & Liu, Hsing-Che, 2019, A review of Thysanarthria with description of seven new species and comments on its relationship to Chaetarthria (Hydrophilidae: Chaetarthriini), Acta Entomologica Musei Nationalis Pragae 59 (1), pp. 229-252 : 240-242

publication ID

https://doi.org/ 10.2478/aemnp-2019-0020

publication LSID

lsid:zoobank.org:pub:9F309FCC-A2ED-47B9-BC37-D0C4A3B482E5

DOI

https://doi.org/10.5281/zenodo.4548831

persistent identifier

https://treatment.plazi.org/id/03F387C5-7A25-FFB3-FC0C-07CA34DDB2E9

treatment provided by

Felipe (2021-02-01 22:41:21, last updated 2024-11-29 12:17:54)

scientific name

Thysanarthria ceylonensis Hebauer, 2001
status

 

Thysanarthria ceylonensis Hebauer, 2001 View in CoL

( Figs 6 View Fig K–O, 11 View Fig )

Thysanarthria ceylonensis Hebauer, 2001: 396 View in CoL

Type material examined. HOLOTYPE: ♂ ( MZLU), SRI LANKA: NORTHERN PROVINCE: ʻCeylon, N. Prov. / Kudattanai / 6 mls SE Point Pedro / 13.II.62, Loc. 70 // At pond in semi- / desert // Lund University / Ceylon Expedition 1962 / Brinck-Andersson- / Cederholm // MZLU / Type no. / 3120:1 // Photo 2017 / by MZLU // MZLU / 2017 / 511’.

Additional material examined. INDIA: MADHYA PRADESH: 1 ♂, 2 specimens ( NHMW, NMPC): River Denwa, ca. 8 km SSE Matkuli, Satpura Range, 400 m, 28.ii.2008, lgt. M. Jäch, S. & P. Sharma; 1 ♀ ( NHMW): Hoshangabad Distr., Bandrabhan, ca. 60 km SSE Bhopal, ca. 5 km NE Hoshangabad, River Narmada, 280 m, 23.‒24.ii.2008, lgt. M. Jäch, S. & P. Sharma; 1 spec. ( NHWM): Chhindwara Distr., Bhadhua Chora (stream), ca. 10 km E Matkuli near Mahul Jhir, 400 m, 28.ii.2008, lgt. M. Jäch, S. & P.Sharma; 1♀ ( NHMW): Hoshangabad Distr., Dhobighat Nala (stream), ca. 2 km SE Pachmarhi,Saphura Range, 900 m, 27.ii.2008, lgt. M. Jäch, S. & P. Sharma.

Redescription. Body length 1.5–1.7 mm (holotype 1.5 mm), maximum body width 0.9–1.0 mm (holotype 0.9 mm). Head and labrum black and pronotum uniformly yellowish; elytra yellowish with slightly darker lateral parts; legs reddish to yellowish. Head with strong microsculpture on interstices; punctation sparse, each puncture bearing pointed seta. Eyes separated by 3.5× the width of one eye in dorsal view. Pronotum with sparse setiferous punctation similar to that on head; interstices without microsculpture. Elytra with 10 striae sharply impressed except anteromedially (near scutellar shield) where neither striae nor serial punctures are visible; intervals weakly convex at midlength and near apex; interval punctation sparse, setiferous; interstices without microsculpture. Aedeagus ( Figs 6 View Fig K–O) 0.4 mm long. Phallobase not much wider at base of parameres than more basally, only indistinctly narrowed at midlength; arcuate in lateral view. Paremere moderately wide basally, slightly narrowing towards apex, apex widely angulate. Median lobe widely bottle-shaped, rounded apically, without paired subapical projections; apex not reaching level of parameral apices; gonopore rounded, situated far from apex.

Differential diagnosis. Thysanarthria ceylonensis resembles T. bengalensis , T. brincki and H. saurahana in having strong mesh-like microsculpture on the head, but it can be easily distinguished from all these species as well as from all other Thysanarthria by a very characteristic aedeagus.

Biology. Specimens from Madhya Pradesh were collected at the sides of small to large rivers with stony banks (e.g., Fig. 11D View Fig ) but precise microhabitat is not known (M. A. Jäch, pers. comm.).

Distribution. Described from Sri Lanka ( HEBAUER 2001) but here recorded from central India (Madhya Pradesh), hence the species is likely widespread in the Indian Peninsula.

HEBAUER F. 2001: The species of the genus Thysanarthria d'Orchymont, 1926 (Coleoptera: Hydrophilidae). Beitrage zur Entomologie 51: 393 - 400.

Gallery Image

Fig. 6. Male genitalia of Thysanarthria species, holotypes (A–I, K–O) and paratype (J). A–E – T.bifida sp. nov. (A–C – whole aedeagus in dorsal, lateral and ventral view; D–E – detail of median lobe and parameres in dorsal and ventral view). F–J – T. trifida sp. nov. (F–H – whole aedeagus of the holotype in dorsal, lateral and ventral view; I – details of parameres of the holotype; J – same of the paratype). K–O – T. ceylonensis Hebauer, 2001 (K–M – whole aedeagus in dorsal, lateral and ventral view; N–O – details of median lobe and parameres in dorsal and ventral view).

Gallery Image

Fig. 11. Distribution of Thysanarthria and American Chaetarthria in Asia (A–B) and Near East (C), and examples of habitats of Thysanarthria (D–F). Localities: D – India, Madhya Pradesh, Bhadhua Chora stream ca. 10 km E of Matkuli Jhir, habitat of T. ceylonensis Hebauer, 2001; E – Republic of South Africa, Western Cape, 8 km NEE of Stanford, habitat of T. atriceps (Régimber, 1903), collecting spot marked by an arrow; F–G – Taiwan, Wufeng distr., 4.3 km SEE of Chaoyang University of Technology, habitat of T. chui sp. nov. (G – detail of sandy shore with one alive beetle). Photo D by M. Jäch, photo E by M. Fikáček, F–G by H.-C. Liu.

MZLU

Lund University

NHMW

Naturhistorisches Museum, Wien

NMPC

National Museum Prague

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Hydrophilidae

Tribe

Chaetarthriini

Genus

Thysanarthria