Matronoides, Förster, 1897

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 : 225

Matronoides

Just one larval specimen of this monotypic genus is known ( Orr & Price 2022). Matronoides cyaneipennis Förster is endemic to altitudes over 900 m in North Borneo and in some localities may occur together with Neurobasis longipes Hagen (R.A. Dow pers. comm.). The adults are reliably seen on Silau Silau Creek in the Kinabalu National Park, Sabah, and presumably diligent searching among leaf packs and submerged bankside root masses would produce more material. The larva is of a heavier build than those its sister genus Neurobasis , but the prementum is relatively longer and narrower than in any known Neurobasis species ( Fig. 29 ). There is also heavier serration on the outer rib of the external caudal lamellae.

Figures

FIGURES 27–34. 27. Prementum of Calopterygidae showing measurements used in family key (based on Calopteryx japonica, redrawn from Miyakawa 1983). 28. Neurobasis chinensis, prementum and left labial palp (redrawn from Lieftinck 1965). 29. Matronoides cyaneipennis, prementum and labial palps (ventral view). 30. Matrona basilaris, prementum (dorsal view, drawn from Wang et al. 2017). 31. Atrocalopteryx atrata, prementum (dorsal view, redrawn from Miyakawa 1983). 32. Mnais tenuis, prementum (dorsal view, redrawn from Matsuki & Lien 1977). 33. Echo uniformis, prementum and left labial palp dorsal view (redrawn from Lieftinck 1965). 34. Psolodesmus mandarinus, prementum (dorsal view, redrawn from Matsuki & Lien 1978).