Skip to Main Content
Two species within Dedroctonus frontalis (Coleoptera: Curculionidae): evidence from morphological, karyological, molecular, and crossing studies.Author(s): Francisco Armendariz-Toledano; Alicia Nino; Brian Sullivan; Jorge Macias-Samano; Javier Victor; Stephen R. Clarke; Gerardo Zuniga
Source: Ann. Entomol. Soc. Am.
Publication Series: Scientific Journal (JRNL)
Station: Southern Research Station
View PDF (676.38 KB)
DescriptionDendroctonus frontalis Zimmermann is considered one of the most important economic and ecological forest pests in the United States, Mexico, and Central America. Recently, two apparent morphological variants of this species were discovered occurring syntopically in Central America and southern Mexico. Morphotype A beetles lack a series of Þne parallel ridges on the episternal area of the prothorax that are present on morphotype B. The goal of the present work was to clarify the taxonomic status of the morphotypes of the D. frontalis species complex. Geometric morphometric analyses of seminal rod and spermatheca shape together with the characterization of 16 attributes of external morphology revealed differences in quantitative and qualitative characters that distinguished adults of the two morphotypes from each other as well as from the closely related species Dendroctonus vitei Wood and Dendroctonus mexicanus Hopkins. Karyotype analysis of morphotype B revealed a chromosomal formula (5AA Xyp) distinct from that found in morphotype A previously reported for D. frontalis (7AAXyp). In the laboratory, forced intermorphotype crosses produced F1 progeny but at lower frequency than intramorphotype pairings, and dissections of spermatheca revealed a lower frequency of insemination at least one type of heterotypic cross. Phylogenetic analysis of the D. frontalis species complex based on 786 bp of the cytochrome oxidase I gene indicated that morphotypes B and A are two independent groups with 98% nodal support within D. frontalis. These data provide compelling evidence that the two syntopic morphotypes represent two distinct sibling species.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationArmendariz-Toledano, Francisco; Nino, Alicia; Sullivan, Brian T.; Macias-Samano, Jorge; Victor, Javier; Clarke, Stephen R.; Zuniga, Gerardo. 2014. Two species within Dedroctonus frontalis (Coleoptera: Curculionidae): evidence from morphological, karyological, molecular, and crossing studies. Ann. Entomol. Soc. Am. 107(1): 11-27.
Keywordsseminal rod, spermatheca, geometric morphometry, syntopic species, integrative taxonomy
- Biochemical evidence that Dendroctonus frontalis consists of two sibling species in Belize and Chiapas, Mexico
- Tarsonemid mite associates of Dendroctonus frontalis (Coleoptera: Scolytidae): implications for the historical biogeography of D. frontalis
- Responses by Dendroctonus frontalis and Dendroctonus mesoamericanus (Coleoptera: Curculionidae) to Ssemiochemical lures in Chiapas, Mexico: possible roles of pheromones during joint host attacks
XML: View XML