A new wasps species
found in Kaya Kinondo forest has been named in honour of the Digo people, a sub
group of the nine mijikenda tribes.
Drynus
digo sp.,is among 13 previously unknown wasps species in
Kenya and Burundi that icipe taxonomists in collaboration with colleagues from
the tropical Entomology Research Institute and the University of Tusca both in
Italy, recently discovered.
Wasps are significantly
beneficial to humankind, specifically because of their ability to naturally
control agricultural pests. This is because the majority of wasps are
parasitic. They usually lay their eggs in or on the eggs or larvae of
other insect species, and as the wasp larva develops, it leads to the
death of the host insect. In fact, for almost every pest
insect species, there is at least one wasp species that
parasitizes it. Globally, parasitic wasps are increasingly being used
in the biological control of crop pests. Indeed, icipe has in
the past recorded significant success in using wasps to control pests of
cabbages and maize in Africa.
All of the 13 new wasp
species discovered recently by icipe and collaborators belong
to a moderately-sized cosmopolitan family of Hymenoptera known as Dryinidae.
Its members are parasitoids that feed on “true bugs”, a group that attacks a
wide variety of plants. As is the case with the majority of wasps, there is
insufficient knowledge on the diversity of dryinid wasps, especially in
Africa. For example, the recently described wasps, along with new Kenyan
records of species already known from elsewhere in Africa, bring the number of
dryinid species found in Kenya to just 76.
“Our studies suggest
that many more species of Dryinidae remain to be recorded in Kenya,
particularly in the northern and eastern parts of the country where there has
been little exploration,” notes Dr. Copeland.
Currently, a total of
17 Dryinidae species are known only from Kenya, including those described in
the recently published icipe study. The majority of these species
were collected in protected national forests and parks. The sites include the
sacred Mijikenda Kaya forests, which are small patches of indigenous,
culturally important, yet threatened forests along the Kenyan coast. Other
collections took place in Ungoye, a small stand of indigenous forest next to
Lake Victoria, which is the only remaining patch of mid-altitude lake-side
forest in Kenya.
Dr. Robert Copeland, icipe scientist, explains that these findings, published in the journal Acta
Entomologica Musei Nationalis Pragae on 1st June 2015,
contribute much needed knowledge to the global taxonomy network.
He observes
that while in general there are significant taxonomic gaps for most living
organisms, the situation is even more critical in regard to groups composed
mostly of small species, as is the case for many families of wasps.
“Alongside bees and
ants, wasps belong to the third largest order of insects, Hymenoptera, known
more commonly as "membrane-winged" insects. Although well over
100,000 species of Hymenoptera are recognised globally, many more are yet to be
described, with wasps, and those of Africa particularly, being insufficiently
studied,” explains Dr Copeland.
The researchers have
named some of the newly discovered wasps in honour of the people who
contributed to the research as follows:
Dryinus digo sp., a
new wasp species found in the Kaya Kinondo forest, has been named in honour of
the Digo people (one of the nine Mijikenda tribes), who
consider this particular Kaya sacred and therefore act as its guardians.
Deinodryinus
musingilai sp.,
which was found in Kasaala, Kitui county, Eastern Kenya, has been named after Mr.
Mulu Musingila, who allowed the researchers to set up traps and collect
specimens on his land leading to the discovery of the species.
Bocchus
johanssoni sp., a
species found in Kasigau, Taita Hills, coastal Kenya, has
been named after the icipe scientist Dr. Tino
Johansson, who is overseeing the Climate Change Impacts on Ecosystem
Services and Food Security in Eastern Africa (CHIESA) project. Funded by the government
of Finland and led by icipe, CHIESA is conducting part of its
studies around the Taita Hills.
Anteon nkubayei sp., a
species that was collected in Rusizi National Park, Burundi, is
named after Mr. Evariste Nkubaye of the Institut des
Sciences Agronomique du Burundi who provided significant
assistance to icipe and collaborators during the surveys.