Hydaticus vittatus explained

Hydaticus vittatus, is a species of predaceous diving beetle found in India, Pakistan, Sri Lanka, Nepal, Bangladesh, Bhutan, Myanmar, China, Japan, Taiwan, Thailand, Cambodia, Laos, Vietnam, Malaysia and Indonesia.[1]

Description

Highly variable body shape characterized by geographic variations. Typical body length is about 11.3 to 14.6 mm. Head blackish where anteriorly variable to yellow. Pronotum also black, but with yellowish laterally. There are two bright golden yellow longitudinal lateral stripes in the basal half of elytra.[2] There are large black markings on elytra and pronotum. Yellow stripes at lateral sides of pronotum are narrow. In male, aedeagus in lateral view without a longitudinal ridge near ventral margin in apical third.[3] [4] Posterior margins of first four segments of hind tarsi transversely with a coarse fringe of flat, adpressed, golden-yellow setae.[5]

Biology

Adults are inhabited in rain water pools, muddy buffalo wallows with grassy margins, fish ponds, small streams, puddles on roads, ditches in forests and artificial pools and paddy fields.

Subspecies

Two subspecies identified.[6]

Notes and References

  1. Web site: INSECTA : COLEOPTERA : ADEPHAGA : FAM. HALIPLIDAE, GYRINIDAE, NOTERIDAE AND DYTISCIDAE . 2021-08-06 . Zool. Surv. India Fauna of Uttar Pradesh, State Fauna Series, 22 (Part-2) : 461-474, 2015.
  2. Web site: INSECT: AQUATIC COLEOPTERA (FAMILY: GYRINIDAE, DYTISCIDAE AND HYDROPHILIDAE) . 2021-08-06 . Zool. Surv. India Fauna of KopiU Hydro Electric Project site, Wetland Ecosystem Series 8, 51-57, 2008 .
  3. Web site: Revision of the Asian and Australian/Pacific species of the Hydaticus (Prodaticus) vittatus and H. (P.) daemeli species groups (Coleoptera: Dytiscidae) . 2021-08-06 . Koleopterologische Rundschau 90 25–72 Wien, September 2020.
  4. Crossland . Michael R. . 1998 . Ontogenetic Variation in Toxicity of Tadpoles of the Introduced Toad Bufo marinus to Native Australian Aquatic Invertebrate Predators . 2021-08-08 . Herpetologica . 54 . 3 . 364–369. 3893154 .
  5. Web site: Freshwater Macroinvertebrates in Hong Kong . 2021-08-08 . www.biosch.hku.hk.
  6. Web site: Hydaticus vittatus (Fabricius, 1775) . 2021-08-08 . www.gbif.org . en.

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