The Systematics and Taxonomy of Final-Instar Larvae of the Family Aphidiidae (Hymenoptera)

Abstract

Il est sugg6r6 que la tribu Trioxini (Aphidiinae) devrait 6tre une sous-famille s6pa-r6e et appelde Trioxinae i cause de la pr6sence d'une protub6rance de I'hypostome qui ne fut pas trouv6e chez les autres aphidiid6s examin6s. A I'int6rieur de cette nouvelle sous-famille sugg6r6e, le genre Lipolexis semble €tre la forme la plus primitive exa-min6e parce qu'en plus d'avoir une protubdrance de I'hypostome, il a un 6pistome complet qui fait d6faut i tous les autres aphidiid6s examin6s. I1 est sugg6r6 que ce genre soit plac6 dans une tribu s6par6e nomm6e Lipolexini. Les trioxin6s semblent 6tre le groupe le plus primitif des Aphidiidae et forment un pont enire les Braconidae et les Aphidiidae. MEMOIRS OF THE ENTOMOLOGICAL SOCIETY OF CANADA NO. I52Les Aphidiini (Aphidiinae) semblent 6tre au sommet de l'6chelle 6volutive des Aphidiidae i cause de la perte ou r6duction de la scl6rite pleurosto-hypostomale, rendant les identit6s des pleurostomes et des hypostomes plus difficile.'-

A Molecular Phylogeny of the Aphidiinae (Hymenoptera: Braconidae)

“…Of importance for the resolution of this question will be the aphidiine genus Lipolexis, which has the same polymorphism in pupation habit as Pseudopraon (Shuja-Uddin, 1977). Although placed within the Trioxini by Mackauer (1968) on the basis of its adult external morphology, Finlayson (1990) considered its larval morphology to be the most plesiomorphic within the Aphidiinae.…”

“…Within the Aphidiinae, four main tribes can be recognized based on adult and larval morphology (Mackauer, 1968;O'Donnell, 1989;Finlayson, 1990). As with its position within the Braconidae, the tribal relationships within the Aphidiinae have proved intractable (Mackauer, 1961;Cho, 1984;Gä rdenfors, 1986).…”

Molecular phylogeny of the Aphidiinae (Hymenoptera: Braconidae) based on DNA sequences of 16S rRNA, 18S rDNA and ATPase 6 genes

“…Each of the four tribes mentioned above have been suggested as being basal. Ephedrini, based on adult morphology (Mackauer, 1961;Gärdenfors, 1986) and DNA sequences (Belshaw & Quicke, 1997;Sanchis et al, 2000); Praini, based on pupation habit and venom apparatus (Tobias, 1967;Edson & Vinson, 1979) and DNA sequences (Dowton et al, 1998;Smith et al, 1999); Aclitini, based on morphology and behaviour (Chou, 1984) and DNA sequences (Kambhampati et al, 2000); and Trioxina (=Aphidiini), based on final instar larval morphology (Finlayson, 1990).…”

Choreopraon totarae(Hymenoptera: Braconidae: Aphidiinae), a new parasitoid ofNeophyllaphis totarae(Hemiptera: Aphidoidea: Drepanosiphidae) in New Zealand

“…The presence of a band of sclerites joining the stipital sclerite with the distal end of the hypostoma would support grouping in the Praini, but it resembles Ephedrini in having a stipital sclerite that crosses over the pleurostomalÁhypostomal sclerite anteriorly about mid-point of its length and the barely discernible labial setae. The prothoracic spiracle has an atrium, as found also in some Praini but not in Ephedrini and Aphidiini (Finlayson 1990).…”

“…Terminology of the wing venation and of the sclerites of the final-instar cephalic structure follows Wharton et al (1997) and Finlayson (1990), respectively.…”