Isosticta tillyardi Campion, 1921

Grand, Daniel, Marinov, Milen, Jourdan, Herve, Cook, Carl, Rouys, Sophie, Mille, Christian & Theuerkauf, Jörn, 2019, Distribution, habitats, phenology and conservation of New Caledonian Odonata, Zootaxa 4640 (1), pp. 1-112 : 38

Isosticta tillyardi Campion, 1921

( Fig. 33 )

Isosticta tillyardi Campion, 1921: 38 .

Distribution ( Fig. 34 ). Endemic to New Caledonia. This species is wide spread on Grande Terre with nearly 50 known localities. It also occurs on Île des Pins ( Bigot 1985). Several specimens collected in February 2006 in the Parc des Grandes Fougères (near La Foa) are held in the CXMNC collection.

Habitat. Similar to habitats in which I. robustior occurs, but I. tillyardi is also present in slow-flowing lowland streams. This species seems to cope with ultramafic soils in the south of Grande Terre.

Biology and behaviour. Adult males move along waterways, searching for females. Oviposition is in diverse plants overlaying the water, but also in rocky crevices. The larva was described by Lieftinck (1976). Emergence occurs in the morning, not far above the water, on rocks or emergent vegetation.

Status. Isosticta tillyardi is largely distributed over Grande Terre with often large populations. We rank it as LC.

Figures

FIGURE 33. Isosticta tillyardi: a) male, b) female.

FIGURE 34. Records of Isosticta tillyardi.