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PestNet is a network that helps people worldwide obtain rapid advice and information on crop protection, including the identification and management of plant pests. It started in 1999. Anyone with an interest in plant protection is welcome to join. PestNet is free and is moderated, ensuring that messages are confined to plant protection.
There was a discussion whether it was serratus or gonagra.
A member of the Australian Museum (A PestNety Associate) wrote: it’s the groundnut bruchine, genus Caryedon definitely, possibly serratus. The two species serratus and gonagra (normally a pest of tamarinds not ground nuts) are only separated by the endophallus in male genitalia which is why the sender has dissected it (v nicely). Both species occur in Africa and Asia.
Later, it’s a beautiful dissection and shows clearly that this is Caryedon gonagra not serratus – the key differences in the endophallic sclerites are illustrated in Delobel 2003: 201 (Ann Soc Ent Fr 39(3): 197-206) – the photo matches gonagra perfectly
Because of previous confusion between the two species, Delobel’s paper is the most important and it reviews all records (older records should be ignored). This species is most commonly reared from tamarind, but is also recorded from pods of Bauhinia, Senna, Cassia, Gleditsia, Acacia, Dichrostachys, Arachis (Delobel notes that this is a lab record only). Delobel records gonagra from the field in Egypt, India, Sri Lanka, Thailand, Vietnam, Australia and New Caledonia. There’s a recent record from Reunion and it was collected in Timor by an Australian Museum survey. I imagine its everywhere between Egypt and New Caledonia. It turns up elsewhere as an occasional accidental import.