Heterophaea, Cowley, 1934

Orr, Albert G. W., 2024, A review of present knowledge of larvae of the Calopterygoidea (Zygoptera) of the Oriental realm, including keys to families and known genera, Zootaxa 5497 (2), pp. 209-243 : 235

Heterophaea

This monotypic genus is known only from north-east Luzon, Philippines. Heterophaea barbata (Martin) is the largest species of the family and the distinctive larvae were recently described on the basis of four exuviae ( Orr & Hämäläinen 2024), determined by supposition. They are notable for their size and for having extremely numerous and well-developed spines on the genae, and 2–3 rows of spines on the outer face of the mandible, sometimes arranged in a crown-like circlet. The head bears numerous small tubercles and the postocular lobes are shallow, somewhat reminiscent of Anisopleura but no close relationship is inferred ( Fig. 62 ). The antennae are 12–15 segmented (V.J. Kalkman pers comm.), more than any other known odonate larva. Various parts of the body bear dense lines of dark claviform setae and long filiform setae. The habitat is presumed to be under stones and boulder in clear swift flowing streams at around 600– 900m.

Figures

FIGURES 61–66. 61. Dysphaea gloriosa: detail of spines on genae and postocular lobe; underside (left), upperside (right) (modified from Nguyen et al. 2024). 62. Heterophaea barbata: dorsal view of head, showing (a) outer mandibular spines (b) genal spines partially visible and (c) right antenna (from Orr & Hämäläinen 2024). 63. Anisopleura subplatystyla, dorsal view of head (original drawing). 64. Bayadera strigata, dorsal view of head (drawn from Yang & Orr 2024). 65. Euphaea decorata, dorsal view of head. (drawn from Xu 2017). 66. Bayadera strigata, left labial palp with detail showing wavy outer margin of outer process of palpal lobe (arrowed), (drawn from Yang & Orr 2024).