Valid Names Results

Beesonia dipterocarpi Green, 1926 (Beesoniidae: Beesonia)

Nomenclatural History

• Beesonia dipterocarpi Green 1926: 55. Type data: BURMA: forests of Burma, on the smaller branches of Dipterocarpus tuberculatus, by C.G. Robbins. Syntypes, female and first instar, by subsequent designation Type depository: London: The Natural History Museum, England, UK; accepted valid name Illustr.

Common Names

Ecological Associates

Hosts:

Families: 1 | Genera: 1

Geographic Distribution

Keys

• Hodgso2020: pp.107-108 ( Adult (M) ) [Beesoniidae]

Remarks

• Systematics: Green (1926) did not assign this taxon to any subfamily then known (MacGillivray 1921). While the basic structure of the male B. dipterocarpi appears to be very similar to that of B. napiformis, it differs in a few particulars, namely (characters of B. napiformis in brackets): (i) body and limbs covered with numerous fleshy setae (apparently few or absent); (ii) antennae with 4 groups of fleshy setae, each group arising from a common base (fleshy setae represented by 4 or 5 single fleshy setae); (iii) scape and pedicel with few setae (with many setae); (iv) prosternum without a median ridge (median ridge present); (v) prosternal and anteprosternal setae present (absent); (vi) antemetaspiracular setae present (absent); (vii) long tochanter setae not differentiated from other setae (differentiated); (viii) penial sheath with a spatulate apex (finely pointed), and (ix) penial sheath with a distinctly separate segment IX (segment IX apparently fused with style). On the other hand, both share: (i) 3-segmented antennae, 3rd segment rather long and of irregular shape; (ii) antennae with two types of fleshy setae, one type very large; (iii) each antenna with 5–6 capitate setae; (iv) a group of setae present laterad to median area of scutum; (v) postmesospiracular setae present across segment; (vi) long postnotal apophysis; (vii) tibia and tarsus fused, forming a tibio-tarsus; (viii) claw long and narrow and not held at an angle to leg; (ix) presence of peg-like fleshy setae distally on all tarsi; (x) tarsal digitules either absent or setose; (xi) tarsal campaniform pore unusually large; (xii) glandular pouches present, each with long setae; (xiii) loculate pores present in glandular pouch and across abdominal segment VIII; (xiv) aedeagus bulbous at anterior end and then needle-like; (xv) penial sheath with setae at anterior end only, all short; (xvi) anal opening obvious dorsally on IX, probably surrounded by a sclerotised area. (Hodgson, 2020)
• Structure: Adult female globular or ovoid, length 6.5 - 10 mm; with a small tuberculate prominence at posterior end; anterior part of body membranous, posterior half densely chitinous (Green, 1926). The gall made on green shoots of Dipterocarpus tuberculatus in Burma is a large irregularly foliaceous mass of grouped and hypertrophied leaf-like or petal like growths resembling somewhat a chrysanthemum flower but of woody texture; at the bases of the clusters of petals are cavities in a hard woody core. A gall may contain 10 to 20 cavities each of which contains a fully developed 3rd stage female. Each female rests with the hind end directed outwards usually in close connection with a crack or tube leading to the surface of the gall, and with the fore end attached to the lining tissue of the cavity. (Beeson, 1941) According to Hu et al. (1955), Green (1926) indicated that males of B. dipterocarpi had hamulohalteres. These are definately absent, as are all the supporting structures, on all species here included in Beesoniidae. (Hodgson, 2020)
• Biology: This species induces the formation of large galls on branches of Dipterocarpus tuberculatus in Burma (Green, 1926).
• General Remarks: Description and illustration of adult female, adult male, and three nymphal stages by Green (1926). Detailed description and illustration of male in Hodgso2020.

Illustrations

Citations