Description of the larva of Vestalis gracilis (Rambur, 1842) (Zygoptera: Calopterygidae) from Thailand Author Rattanachan, Kaewpawika Forest and Plant Conservation Research Office, Department of National Parks, Wildlife and Plant Conservation, Bangkok 10900, Thailand Author Sangpradub, Narumon Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand Author Keetapithchayakul, Tosaphol Saetung Forest and Plant Conservation Research Office, Department of National Parks, Wildlife and Plant Conservation, Bangkok 10900, Thailand & Department of Zoology, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand text International Journal of Odonatology 2022 2022-01-10 25 1 6 https://doi.org/10.48156/1388.2022.1917151 journal article 310117 10.48156/1388.2022.1917151 d50c45d4-8e6b-4068-896d-a2cd297dc09e 2159-6719 15554798

Table 1. Comparison of characters of known Vestalis larvae (? = not mentioned in original description).

Characters	V. luctuosa	V. amoena	V. gracilis
Number of antennal segments (Figure 8)	8	7	8
Direction of protuberances on postocular lobe (Figure 9)	upward	posterolateral	posterolateral
Setae on labial palp	absent	2	2
Setae on basal region of ligula	?	?	present
Outer hook of labial palps with row of small protuberances	?	?	present
Blunt posterolateral spine on S9	absent	?	present
Posterior margin of median lamella (Figures 6–7)	point	oblique, truncated	oblique, truncated
References	Ris (1912)	Liefinck (1965)	this study