Perspective: Where might be many tropical insects?

DH Janzen, W Hallwachs - Biological Conservation, 2019 - Elsevier
I have been watching the gradual and very visible decline of Mexican and Central American
insect density and species richness since 1953 and Winnie since 1978. The loss is very real …

Ten species in one: DNA barcoding reveals cryptic species in the neotropical skipper butterfly Astraptes fulgerator

…, JM Burns, DH Janzen, W Hallwachs - Proceedings of the …, 2004 - National Acad Sciences
Astraptes fulgerator, first described in 1775, is a common and widely distributed neotropical
skipper butterfly (Lepidoptera: Hesperiidae). We combine 25 years of natural history …

[HTML][HTML] Joining inventory by parataxonomists with DNA barcoding of a large complex tropical conserved wildland in northwestern Costa Rica

DH Janzen, W Hallwachs - PloS one, 2011 - journals.plos.org
Background The many components of conservation through biodiversity development of a
large complex tropical wildland, Area de Conservacion Guanacaste (ACG), thrive on knowing …

DNA barcodes distinguish species of tropical Lepidoptera

…, DH Janzen, JM Burns, W Hallwachs… - Proceedings of the …, 2006 - National Acad Sciences
Although central to much biological research, the identification of species is often difficult.
The use of DNA barcodes, short DNA sequences from a standardized region of the genome, …

Advancing taxonomy and bioinventories with DNA barcodes

…, A Hausmann, W Hallwachs… - … Transactions of the …, 2016 - royalsocietypublishing.org
We use three examples—field and ecology-based inventories in Costa Rica and Papua
New Guinea and a museum and taxonomic-based inventory of the moth family Geometridae—to …

DNA barcodes reveal cryptic host-specificity within the presumed polyphagous members of a genus of parasitoid flies (Diptera: Tachinidae)

…, DH Janzen, W Hallwachs… - Proceedings of the …, 2006 - National Acad Sciences
Insect parasitoids are a major component of global biodiversity and affect the population
dynamics of their hosts. However, identification of insect parasitoids is often difficult, and they …

Extreme diversity of tropical parasitoid wasps exposed by iterative integration of natural history, DNA barcoding, morphology, and collections

…, AR Deans, DH Janzen, W Hallwachs… - Proceedings of the …, 2008 - National Acad Sciences
We DNA barcoded 2,597 parasitoid wasps belonging to 6 microgastrine braconid genera
reared from parapatric tropical dry forest, cloud forest, and rain forest in Area de Conservación …

Wedding biodiversity inventory of a large and complex Lepidoptera fauna with DNA barcoding

…, JM Burns, W Hallwachs… - … of the Royal …, 2005 - royalsocietypublishing.org
… In 1978, DH Janzen and W. Hallwachs began the inventory of the entire caterpillar fauna (exclusive
of leaf miners) and their parasitoids of Area de Conservación Guanacaste (ACG) in …

Climatic unpredictability and parasitism of caterpillars: implications of global warming

…, RE Ricklefs, GL Gentry, W Hallwachs… - Proceedings of the …, 2005 - National Acad Sciences
Insect outbreaks are expected to increase in frequency and intensity with projected changes
in global climate through direct effects of climate change on insect populations and through …

DNA barcodes affirm that 16 species of apparently generalist tropical parasitoid flies (Diptera, Tachinidae) are not all generalists

…, DM Wood, DH Janzen, W Hallwachs… - Proceedings of the …, 2007 - National Acad Sciences
… tricolorDHJ01 and W. tricolorDHJ02 are each specialists on a different species of Arctiidae,
whereas W. tricolorDHJ03 and W. tricolorDHJ04 are specialists on each of two species of …