Biodiversity Data Journal :
Taxonomic paper
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A new species of Cordyligaster Macquart, reared from caterpillars in Area de Conservacion Guanacaste, northwestern Costa Rica
Corresponding author:
Academic editor: Torsten Dikow
Received: 17 Oct 2014 | Accepted: 21 Nov 2014 | Published: 24 Nov 2014
© 2014 AJ Fleming, D Wood, M Smith, Daniel Janzen, Winnie Hallwachs
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Fleming A, Wood D, Smith M, Janzen D, Hallwachs W (2014) A new species of Cordyligaster Macquart, reared from caterpillars in Area de Conservacion Guanacaste, northwestern Costa Rica. Biodiversity Data Journal 2: e4174. https://doi.org/10.3897/BDJ.2.e4174
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We describe a new species of Cordyligaster Macquart (Diptera: Tachinidae) from Area de Conservacion Guanacaste (ACG) in northwestern Costa Rica. Cordyligaster capellii sp. n., is described and photographed. All specimens of C. capellii were reared from Syngamia florella (Stoll, 1781) (Lepidoptera, Crambidae, Spilomelinae), a leaf-rolling caterpillar collected in ACG rain forest. By coupling morphology, photographic documentation, life history and molecular data, we provide a clear and concise description of this new species. In addition the authors provide new distribution and host records for C. fuscipennis (Macquart) reared in ACG.
Cordyligaster, Diptera, Tachinidae, tropical rain forest, tropical dry forest, parasitoid fly, host-specificity, caterpillar inventory, Crambidae
Cordyligaster Macquart, 1844, is a small new world genus of the subfamily Dexiinae (Diptera, Tachinidae, Dexiinae). This genus is easily distinguished from other Dexiine genera of tachinids by its narrow and petiolate abdomen (Figs
The last major systematic treatment of this genus was
CNC Canadian National Collection of Insects, Arachnids and Nematodes, Ottawa, Canada
USNM National Museum of Natural History, Washington, D.C., USA
INBio Instituto Nacional de Biodiversidad, Santo Domingo de Heredia, Costa Rica
SMF Forschungsinstitut und Naturmuseum Senckenberg, Frankfurt-am-Main, Germany
MZSP Museu de Zoologia Universidade de São Paulo, São Paulo, Brazil
All flies and rearing information described here were found by the 35+ year–old ongoing inventory of the caterpillars, their food plants and their parasitoids of the dry forest, rain forest, cloud forest, and intergrades, in the 125,000+ ha terrestrial portion of Area de Conservación Guanacaste (ACG) in northwestern Costa Rica (
In the near 4 decades since its inception in 1978, this inventory has reared approximately 600,000 wild-caught caterpillars. All frequencies of parasitization reported here must be considered against the background of this inventory. Equally, it is patently obvious that although the inventory is carried out throughout the year, there is a bias towards certain environments, types of vegetation and distance off the ground. Comparison of reared species of parasitoids with those collected by net or Malaise traps demonstrates that to date, the caterpillar inventory has so far encountered well less than half the species of caterpillar parasitoids present in ACG. The largest unsampled void is the upper foliage of the canopy above about 3-4 m above the ground.
The treatment reported here is focused on placing names on the species reared, thereby preparing them for later detailed ecological and behavioral accounts and studies that will normally extend across ACG ecological groups, whole ecosystems, and taxonomic assemblages much larger than a genus.
DNA barcodes (standardised 5’ region of the mitochondrial cytochrome c oxidase I (COI) gene) for all ACG inventory specimens were obtained using DNA extracts prepared from single legs using a glass fibre protocol (
Our descriptions of new species are deliberately brief and only include some differentiating descriptions of body parts and colors that are commonly used in Tachinid identification. These brief descriptions are complemented with an extensive series of color photos of every species to illustrate the readily observed differences among these species.
Habitus photographs were taken using a Canon T3i digital SLR, using a 65mm Macro Photo Lens 1:2.8 (MP–E 65mm), mounted on a microscope track stand (AmScope, Model: TS200) modified to accept a Manfrotto QR 200PL–14 quick release plate. Images were shot in aperture priority, allowing the camera to control shutter speed at f/4.5, over 40 images at equal distance increments. Illumination was provided with a homemade reflective dome (instruction for dome creation can be found at: http://www.cdfa.ca.gov/plant/ppd/entomology/Dome/kd–200.html) placed over a 144 LED ringlight (AmScope, Model: LED–144–YK).
Adult fly dissections followed standard practice (
The photographic series were created using Photoshop CS6, and Zerene Stacker Software v1.04. So as to maximize image quality and depth of field, photo series were digitally stacked to produce a final composite image.
The terminology used for genitalia (which refers here only to the sclerotized parts of the genitalia, and not to the soft internal structures) and other body parts follows
All specimens listed as examined are considered paratypes, except for the holotype, which is noted separately.
All caterpillars reared from ACG efforts receive a unique voucher code in the format of yy–SRNP–xxxxx. Any parasitoid emerging from this caterpillar receives the same voucher code, and then if/when later the parasitoid is dealt with individually, it receives a second voucher code unique to it, in the format of DHJPARxxxxxxx. The voucher codes and collateral data assigned to both host and emergent parasitoids are available at http://janzen.bio.upenn.edu/caterpillars/database.lasso. To date, all DHJPARxxxxxxx coded tachinids have had one leg removed for attempted DNA barcoding at the Biodiversity Institute of Ontario (BIO) in the University of Guelph, with all collateral data and all successful barcodes permanently and publically deposited in the Barcode of Life Data System (BOLD, www.boldsystems.org) (Suppl. material
Inventoried Tachinidae were collected under Costa Rican government research permits issued to DHJ since 1978, and likewise exported under permit by DHJ from Costa Rica to Philadelphia, and then to the final depository in the Canadian National Insect collection in Ottawa, Canada. Tachinid identifications for the inventory were done by DHJ in coordination with a) visual inspection by AJF and DMW, b) DNA barcoding by BIO, MAS, and BOLD, and c) correlation with host caterpillar identifications by DHJ and WH through the inventory itself. Dates of capture of each reared fly in the inventory are the dates of eclosion of the fly, and not the date of capture of the caterpillar. This is because the fly eclosion date is much more representative of the time when that fly species is on the wing than is the time of capture of the caterpillar or (rarely) finding a parasitized pupa. However, the collector listed is the parataxonomist who found the caterpillar, rather than the person who retrieved the newly eclosed fly from its rearing bag or bottle, and processed it by freezing, pinning, labeling and oven–drying. Fly biology and degrees of parasitization by these flies will be the detailed subject of later papers.
Cordyligaster
Cordylidexia
Megistogaster
Eucordylidexia
Eucordyligaster
analis
fuscipennis
ategulata
minuscula
septentrionalis
nyomala
petiolata
fuscifacies
tipuliformis
townsendi
Male (Fig.
Detailed dorsolateral view of Cordyligaster capellii; square indicates the magnified inset; circles indicate 3 post-sutural supra-alar bristles.
Comparative figure, detailing the differences in colour and relative shape of wings between a) Cordyligaster fuscipennis, b) Cordyligaster capellii, and c) Cordyligaster minuscula; note the undulation of crossvein dm-cu, and the coloration of the wings.
Female (Fig.
Cordyligaster capellii posesses exceptionally large calypteres, a trait also shared by C. nyomala, and C. minuscula. While C. minuscula (Wulp) can also sometimes have the variable character of 3 post-sutural supra alars, C. capellii is distinguished by the presence of 3 postsutural supra-alars (Fig.
ACTTTATATTTTATTTTTGGAGCATGAGCAGGTATATTAGGAACATCTTTAAGTATTTTAATTCGAACAGAATTAGGACATCCTGGTTCATTAATTGGAGATGATCAAATTTATAATGTTATTGTAACAGCTCATGCTTTTATTATAATTTTTTTTATAGTTATACCAATTATAATTGGAGGATTTGGAAATTGATTAGTTCCTTTAATATTAGGAGCACCAGATATAGCTTTCCCTCGAATAAATAATATAAGATTTTGACTTCTTCCTCCTTCTTTAATATTATTATTAGTTGGTAGAATAGTTGAAAATGGAGCTGGAACAGGATGAACTGTTTACCCTCCTTTATCTTCTAATATTGCTCATAGAGGATCTTCTGTAGATTTAACTATTTTTTCATTACATTTAGCAGGAATTTCTTCTATTATAGGAGCTGTAAATTTTATTACAACAGTAATTAATATACGAGCAACAGGAATTACATTTGATCGAATACCTTTATTTGTATGATCTGTAGCTATTACAGCTTTATTACTTTTATTATCATTACCTGTATTAGCCGGAGCTATTACTATATTATTAACAGATCGAAATATAAATACTTCATTTTTTGATCCTGCAGGAGGAGGAGATCCTATTTTATATCAACACTTATTT.
Genetic comparison to the type specimens of previously know species was outside the scope of this paper, however the authors have selected to give the barcode data here as a diagnostic character such that it is readily available for future works which may undertake the barcoding of those previously described types.
This species is named to honor Sr. Luciano Capelli of San Jose, Costa Rica in recognition and appreciation of his enthusiastic and superb photography of all aspects of ACG specifically, and Costa Rica’s conserved wildlands more broadly, and for allowing ACG and Costa Rican conservation in general to freely use these photographs to explain conserved wildlands to the public.
Costa Rica, ACG, Prov. Guanacaste, rain forest, 390 – 440m m elevation.
Hosts: Crambidae, Syngamia florella (Stoll, 1781). While more than 500 species of Crambidae have been reared from more than 65,000 leaf-rolling crambid caterpillars in ACG dry forest, rain forest and cloud forest (and intergrades among them), generating 3,000+ tachinid rearings, Cordyligaster capellii has been reared just 10 times and always from the leaf roller Syngamia florella feeding on Spermacoce exilis (L.O. Williams) (Rubiaceae) herbs in the dry-rain forest ecotone on the northern intermediate elevation slopes of Volcan Orosi and Cerro Orosilito, Sector Del Oro and Sector Pitilla, of ACG. These ten rearings were spread among 144 S. florella wild-caught caterpillars. It is likely to be the only species of host for this fly in ACG.
Male (Fig.
Female (Fig.
This species is easily recognized by its relatively large size, black palpus, black antenna, and all black abdomen. It is distinguished from C. petiolata (
AACTTTATACTTTATTTTCGGTGCTTGATCAGGAATACTAGGAACATCTTTAAGAATTTTAATTCGAACAGAATTAGGACATCCAGGTTCACTAATTGGAGATGATCAAATTTATAACGTAATTGTAACAGCTCATGCTTTTATTATAATTTTTTTTATAGTTATACCAATTATAATTGGAGGATTTGGAAATTGATTAGTTCCTTTAATATTAGGAGCTCCAGATATAGCTTTTCCTCGAATAAATAATATAAGATTTTGACTACTTCCCCCTTCTTTATTACTTCTCCTAATTGGTAGAATAGTTGAAAATGGAGCTGGAACAGGATGAACAGTTTACCCTCCTTTATCTTCTAATATTGCACATAGAGGATCTTCTGTTGACTTAACTATTTTTTCACTACATTTAGCAGGTATTTCTTCTATTATAGGAGCTGTAAATTTTATTACAACAGTAATTAATATACGATCAACAGGAATTACATTTGATCGAATACCTTTATTTGTTTGATCTGTAGCAATTACAGCATTATTATTACTTTTATCTTTACCTGTATTAGCAGGAGCTATTACCATATTATTAACTGATCGAAATATAAATACTTCTTTTTTTGACCCAGCAGGAGGAGGAGANCCTATTTTATACCAACATTTATTT
Genetic comparison to the type specimens of previously know species was outside the scope of this paper, however the authors have selected to give the barcode data here as a diagnostic character such that it is readily available for future works which may undertake the barcoding of those previously described types.
Costa Rica, ACG, Prov. Guanacaste, rain forest, 153 – 640m elevation. Originally described from "South America", this species has been found to be very widely distributed, from Brazil, west to Bolivia and Peru, and North to Guatemala.
Hosts: Three species of leaf-rolling spilomeline Crambidae feeding on leaves of rain forest Urticaceae.
Revised key to the species of Cordyligaster Macquart Key adapted from |
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1 | Calyptere reduced to mere rounded rims | 2 |
– | Calyptere normal in size | 6 |
2 | Thorax yellow on sides, only mesonotum largely black; antenna entirely yellowish; all coxae, femora, and tibiae yellow | C. analis (Macquart) |
– | Thorax black; at least third antennal segment black; legs black except in tipuliformis | 3 |
3 | Legs chiefly yellowish, including fore coxae, femora more or less infuscated centrally; palpi yellow | C. tipuliformis Walker |
– | Legs black; palpi black | 4 |
4 | Terga1+2, T3, and base of T4 yellow except for narrow black dorsal vitta | C. townsendi Guimaraes |
– | Abdomen predominantly shining black, at most narrowly yellow at base of T3 (apparent T1+2), and with usual silvery tomentose bands at bases of T3 and T4 | 5 |
5 | Disk of mesonotum brilliantly shining; T3 with a pair of yellow spots at base, in ground color beneath band of tomentum | C. petiolata (Wiedemann) |
– | Mesonotum thinly tomentose; T3 black in ground color, without yellow spots beneath band of tomentum | C. fuscipennis (Macquart) |
6 | Thorax covered with golden pollinosity, with faint dark stripes; antenna dark red; palpi yellow | C. nyomala Townsend |
– | Thorax with dark ground colour and no golden pollen; antenna either entirely black or only pedicel reddish | 7 |
7 | Thorax with faintly visible silver pollinosity forming the appearance of visible dark vittae; crossvein dm-cu undulated appearing vaguely S shaped; pedicel and palpus appearing rusty brown almost orange; only posterior katepisternal bristle present; wings smoky reddish/brown | C. minuscula Wulp |
– | Thorax glabrous black with very little silver pollinosity; crossvein dm-cu not undulated; vein R4+5 haired up to crosvein r-m; pedicel and palpus black; 2 katepisternal bristle present; wings smoky yellow | C. capellii n. sp. |
Mitochondrial DNA barcodes from the two species of Cordyligaster displayed no heteroplasmy or double banding that might suggest the inadvertent amplification and sequencing of a nuclear pseudogene. Sequences displayed the characteristic AT bias of insect mitochondrial DNA (70%) and showed very little intraspecific variation within their DNA barcode region (min 0.05%, min 0.31% respectively) with greater inter-specific variation evident between them (6.83%).
We gratefully acknowledge the unflagging support of the team of ACG parataxonomists (Janzen et al. 2009, Janzen & Hallwachs 2011) who found and reared the specimens used in this study, and the team of biodiversity managers who protect and manage ACG forests that host these tachinids and their caterpillar hosts. The study has been supported by U.S. National Science Foundation grants BSR 9024770 and DEB 9306296, 9400829, 9705072, 0072730, 0515699, and grants from the Wege Foundation, International Conservation Fund of Canada, Jessie B. Cox Charitable Trust, Blue Moon Fund, Guanacaste Dry Forest Conservation Fund, Area de Conservación Guanacaste, Permian Global, and University of Pennsylvania (DHJ&WH). This study has been supported by the Government of Canada through its ongoing support of the Canadian National Collection, Genome Canada, the Biodiversity Institute of Ontario, and the Ontario Genomics Institute (2008–0GI–ICI–03) (MAS), and by a Discovery Grant from Natural Sciences and Engineering Research Council of Canada (MAS). The authors also wish to acknowledge the efforts and time of the editor and reviewers, who provide insights and suggestions which allow us to make our work better.