Seventh International Congress of Hymenopterists

7 th International Congress of Hymenopterists
20-26 June 2010, Kszeg Hungary
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At the end of the investigations; developmental times were determined as average of
13.62±0.01 and 11.48±0.13 days for female and male of T. semistriatus, respectively. Similar
results were also obtained for T. grandis. Both of parasitoids species males emerged before
two days than females. Females lived significantly longer than males. While the female of T.
semistriatus parasited an average of 173.70 ±10.69 eggs during longevity, it was found an
average of 151.60±14.66 eggs for the female of T. grandis. Emergence range of T.
semistriatus and T. grandis were determined between 17.50- 93.04% and 31.66- 91.46%
respectively. It was designated that sex ratio was in favour of female at first ten days of
parasitoids life time and in favour of male with increasing parasitoids age. Effective mass
rearing time for both of parasitoids was also carried by these data results.
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Basics First – the phylogeny of the brood parasitic Nyssonini (Hymenoptera: Apoidea)
Stefanie Krause* & Michael Ohl
Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung an der Humboldt-
Universität zu Berlin, Invalidenstraße 43, 10115 Berlin, Germany; stefanie.krause@mfn-berlin.de;
michael.ohl@mfn-berlin.de
In most species of apoid wasps, the females build their own nests and stock the brood cells
with paralyzed prey. Remarkable exceptions are the Nyssonini, a poorly studied tribe of
worldwide distribution: All of the more than 200 recent species are assumed to be obligate
brood parasites. That is, they use the nests and larval food provided by females of other
crabronid wasps for their own offspring. Obligate brood parasitism evolved several times
independently in different groups of aculeates, for example within the Pompilidae and
Sapygidae. However, within the apoid wasps, this alternative behavior probably evolved
twice, in the genus Stizoides and in the Nyssonini. Despite their extraordinary mode of
parental care, which spotlight the Nyssonini, their biology, evolution and even taxonomy are
still only poorly understood. As an essential prerequisite for further research on this group, the
current work aims to conduct a first cladistic analysis. The genus level analysis presented here
is based on 43 morphological characters. It includes 34 terminal taxa, which represent the 18
nyssonine genera, as well as three outgroup-species belonging to the Alyssontini and
Bembicini respectively. The result supports the monophyly of the Nyssonini and of most
nyssonine genera. Nursea and Nippononysson, repeatedly described as basal genera within the
Nyssonini, form a monophyletic group, which actually branches off early within the tribe. The
monophyly of Foxia + (Cresson + (Perisson + Antomartinezius)), traditionally regarded as
very close-knit group, is supported. It is found to be the sister taxon to the rather derived
monophylum (Hovanysson camelus + Brachystegus) + (Acanthostethus + (Zanysson +
(Metanysson + (Idionysson + Losada)))). The relationship between the disputable genera
Nysson and Synnevrus remains unresolved. However, each of these two genera is shown to be
not monophyletic. Hovanysson also constitutes an artificial group and needs to be revised.
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Australian spider wasp systematics (Hymenoptera: Pompilidae) – clearing up more than
200 years of confusion and misclassification
Lars Krogmann 1 * & Andrew D. Austin 2
1 Staatliches Museum für Naturkunde Stuttgart, Germany; krogmann.smns@naturkundemuseum-bw.de
2 Australian Centre for Evolutionary Biology and Biodiversity, School of Earth and Environmental Sciences, The
University of Adelaide, Australia; andy.austin@adelaide.edu.au
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