Haemadipsa picta

Haemadipsa picta (common names: tiger leech, or less commonly, stinging land leech) is a large (up to 33 mm long) terrestrial leech found in Borneo, Indochina, and Taiwan.[1][2] It was described by John Percy Moore based on specimens collected from Sarawak, Borneo.[3] It preys primarily on medium- to large-sized mammals, including humans.[2]

Haemadipsa picta
Sabah, Borneo, Malaysia.
Scientific classification
Kingdom: Animalia
Phylum: Annelida
Class: Clitellata
Order: Arhynchobdellida
Family: Haemadipsidae
Genus: Haemadipsa
Species:
H. picta
Binomial name
Haemadipsa picta
Moore, 1929

Ecology and behavior

Haemadipsa picta occur on bushes and grasses about 1 metre or higher above the ground in moist forests. They are fast and actively moving, and even known to fall onto hikers from higher bushes or leaves. They attach themselves to the hands, arms, shoulders, and even neck of passers-by. The bites of this species are comparatively painful and difficult to heal, hence the common name "stinging land leech" (although Haemadipsa ornata, with a similarly painful bite, would deserve this name too).[1][2]

Description

Haemadipsa picta measure 13–33 mm (0.51–1.30 in) in length. The anterior sucker diameter is 1.3–2.5 mm (0.051–0.098 in) and the posterior one 2.5–3.7 mm (0.098–0.146 in). It is easily recognized by its longitudinally striped reddish brown dorsum: there is a broad, bluish-gray, yellow-greenish, or multicolored median-paramedian field that contains three to five black or dark brown broken stripes inside. There is also a white or pale yellowish longitudinal marginal stripe with dark-spotted borders. The venter is uniformly yellowish brown.[1][2]

References
  1. Lai, Yi-Te; Nakano, Takafumi; Chen, Jiun-Hong (2011). "Three species of land leeches from Taiwan, Haemadipsa rjukjuana comb. n., a new record for Haemadipsa picta Moore, and an updated description of Tritetrabdella taiwana (Oka)". ZooKeys. 139: 1–22. doi:10.3897/zookeys.139.1711. PMC 3260908. PMID 22259307.
  2. Chen, Jiun-Hong. "Haemadipsa picta". BiotaTaiwanica: Clitellates. Taiwan Biodiversity Information Facility. Archived from the original on 19 July 2015. Retrieved 17 January 2016.
  3. Encyclopedia of Life. "Details for: Haemadipsa picta". Encyclopedia of Life. Retrieved 17 January 2016.
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