Valid Names Results
Discochiton papillatum Hodgson, 2018 (Coccidae: Discochiton)Nomenclatural History
- Discochiton papillatum Hodgson 2018: 50. Type data: MALAYSIA: Malaya, Kuala Lumpur, on Elaeis guineensis, 8/25/1931. Holotype, female, by original designation Type depository: London: The Natural History Museum, England, UK; accepted valid name Notes: Paratype ff: left label: Paralecanium [crossed out] / Discochiton / papillatum / Hodgson / paratype ff; right labels: Paralecanium / expansum Green, var. / Fed. Malay States / Kuala Lumpur / 18.xi.1926 / on African oil palm / G.H. Corbett #3531 (BMNH): 3/5adff (g). Illustr.
Common Names
Ecological Associates
Hosts:
Families: 3 | Genera: 3
- Arecaceae
- Elaeis guineensis | HodgsoWi2018
- Orchidaceae
- Coelogyne prolifera | HodgsoWi2018 | (= Coelogyne flavida)
- Piperaceae
- Piper nigrum | HodgsoWi2018
Geographic Distribution
Countries: 5
- Brunei | HodgsoWi2018
- India | HodgsoWi2018
- Indonesia
- Sumatra | HodgsoWi2018
- Malaysia
- Malaya | HodgsoWi2018
- Sarawak | HodgsoWi2018
- Thailand | HodgsoWi2018
Keys
- HodgsoWi2018: pp.16-18 ( Adult (F) ) [species of Discochiton]
Remarks
- Systematics: Adult female D. papillatum are immediately recognizable by the presence of numerous small fleshy dermal papillae which cover much or nearly all of the dorsum; however, the material varied fairly significantly. Some specimens off Piper from Malaysia (Sarawak) differed from the holotype in that the fleshy dermal papillae were present more or less throughout the dorsum and these specimens also tended to have more preopercular pores. Also, compared to the holotype, some Sarawak specimens also tended to have: (i) far fewer marginal setae; (ii) many more preopercular pores, and (iii) smaller anal plates and spiracles. Despite these differences, it is considered that the Sarawak material is conspecific with the holotype and merely shows regional variation. On the other hand, the specimens from Brunei and some from Sarawak tended to have many fewer papillae and the papillae appeared to be rather short, appearing more like a sclerotised ring but with some depth when focussing. Adult female D. papillatum belong to a group of Discochiton species that lack leg stubs and have preopercular pores associated with the posterior one or two clear areas only. The other two species which have this combination of character-states are D. malainum and D. sarawakense. (Hodgson & Williams, 2018)
- Structure: Slide-mounted adult female. Body broadly oval. Length 3.4–5.0 mm, width 3.2–4.0 mm. (Hodgson & Williams, 2018)
- General Remarks: Detailed description and illustration in Hodgson & Williams, 2018.
Illustrations
Citations
- HodgsoWi2018: description, diagnosis, distribution, host, illustration, key, taxonomy, 50-53
- ZarkanApTu2021: distribution, host, 158
