Placobdelloides_siamensis

<i>Placobdelloides siamensis</i>

Placobdelloides siamensis

Species of leeches

Placobdelloides siamensis is a species of blood-feeding jawless leech in the family Glossiphoniidae.[1][2] It is commonly known as the Siam shield leech and is a prevalent ectoparasite on Malayemys turtles but has a range of Geoemydidae hosts. In high numbers it can cause severe anaemia and malnutrition which can lead to the death of its host.[3]

Quick Facts Placobdelloides siamensis, Scientific classification ...

Taxonomy

The species was first described as Hemiclepsis siamensis by Oka in 1917[1] then transferred by Sawyer to his new genus Placobdelloides in 1986.[2] In 2018, it was redescribed from specimens collected in Thailand.[4]

Hosts

Placobdelloides siamensis on the carapace of Malayemys subtrijuga (arrows)

The type host is the Black Marsh Turtle, Siebenrockiella crassicollis. Other hosts include the Southeast Asian Box Turtle, Cuora amboinensis, the Yellow-headed Temple Turtle, Heosemys annandalii, the Mekong Snail-eating Turtle Malayemys subtrijuga, the Malayan Snail-eating Turtle Malayemys macrocephala, the Khorat Snail-eating Turtle Malayemys khoratensis, Oldham's lead turtle Cyclemys oldhamii and the giant Asian pond turtle Heosemys grandis.[3]

References

  1. [1]
    Oka, A. 1917. Zoological Results of a Tour in the Far East, pt. III. Hirudinea. Memoirs of the Asiatic Society of Bengal, VI, pp. 157-176, pl. VII.
  2. [2]
    Sawyer, R.T. 1986: Leech biology and behaviour. Volume II. Feeding biology, ecology, and systematics. Clarendon Press, Oxford.
  3. [3]
    Trivalairat, Poramad; Chiangkul, Krittiya; Purivirojkul, Watchariya (2020-10-26). "Parasitism of Placobdelloides siamensis (Oka, 1917) (Glossiphoniidae: Hirudinea) in Snail-eating Turtles, Malayemys spp., and the effects of host and aquatic environmental factors". Biodiversity Data Journal. 8 (e57237). doi:10.3897/BDJ.8.e57237. Retrieved 2020-10-30. this study also showed two new hosts, including Cyclemys oldhamii and Heosemys grandis Open access icon
  4. [4]
    Chiangkul, Krittiya; Trivalairat, Poramad; Purivirojkul, Watchariya (2018). "Redescription of the Siamese shield leech Placobdelloides siamensis with new host species and geographic range". Parasite. 25: 56. doi:10.1051/parasite/2018056. ISSN 1776-1042. PMC 6254108. PMID 30474597. Open access icon


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