Landcare Research - Manaaki Whenua

Landcare-Research -Manaaki Whenua

ICHNEUMONIDAE: : Amblyaclastus Gauld 1984


Characteristics of Amblyaclastus include: 1. Body size (mm) (excluding antennae and ovipositor):<10mm; 2. Position of spiracle on Tergite 1 (T1 of metasoma):at, close to, or before centre; 3. Shape of aerolet in forewing:other; 4. Colour of face:only black; 5. Metasoma compressed:dorsal-ventrally; 6. Size of Ocelli:small; 7. Length of antennae:as long, or longer than body; 8. Length of ovipositor:not longer than body; 9. Wings:present; 10. Colour of wings:hyaline (clear); 11. Sternaulus (on mesopleuron):short; less than 0.5x length mesopleuron; 11. Sternaulus (on mesopleuron):long; more than 0.5x length mesopleuron; 12. Shape of face in lateral view:flat or only weakly bulging; 13. Sternite on T1(viewed laterally):sternite not extending past spiracle; 14. Shape of T1(viewed laterally):evenly curved; 15. Number of teeth in mandibles:1 or 2; 16. Patterns on metasoma:same colour throughout; 16. Patterns on metasoma:bicoloured (bands); 17. Length of T1 vs T2:T1 longer than T2; 18. Sculpture on mesoscutum:finely pitted, many hairs; 19. Width of T1 (viewed dorsally):anterior part slender often parallel, strongly widening behind spiracle; 20. Glymma on T1:absent; 21. Sculpture on metasoma:smooth with a semi-glossy or satin appearance at least on T2; 22. Propodeum length:Propodeum very short (not reaching beyond coxal insertion).

Distribution in NZ

North Island: AK, WN.

Species in NZ

One undescribed species.

Biology & hosts

Amblyaclastus is a southern temperate genus with species in Australia and New Zealand (Gauld 1984). Nothing is known about the New Zealand species.

Sources of information

Gauld ID 1984. An Introduction to the Ichneumonidae of Australia. London, British Museum (Natural History). 413 p.


Ward DF & Schnitzler FR. 2013. Ichneumonidae of New Zealand. Genus Amblyaclastus
Accessed: 13 July 2020


v1.0. Ward DF & Schnitzler FR. 2013