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Revision, phylogeny and historical biogeography of the genus Apodrosus Marshall, 1922 (Coleoptera: Curculionidae: Entiminae)

Revision, phylogeny and historical biogeography of the genus Apodrosus Marshall, 1922... AbstractThe Caribbean weevil genus Apodrosus Marshall, 1922 is revised, including aredescription of A. argentatus Wolcott, 1924 and A. wolcotti Marshall, 1922and description of 11 new species: A. adustus, sp.n. (Bahamas), A.andersoni, sp.n. (Dominican Republic), A. artus, sp.n. (Dominican Republic),A. earinusparsus, sp.n. (Dominican Republic), A. empherefasciatus, sp.n.(Bahamas), A. epipolevatus, sp.n. (Puerto Rico), A. eximius, sp.n.(Dominican Republic), A. mammuthus, sp.n. (Mona Island, Turks and CaicosIslands), A. quisqueyanus, sp.n. (Dominican Republic), A. stenoculus, sp.n.(Dominican Republic) and A. viridium, sp.n. (Dominican Republic). A key tothe species and illustrations of external and internal structures areprovided. Apodrosus is characterized as a monophyletic group by twounreversed synapomorphies – i.e., the presence of a median fovea on the apexof abdominal sternum VII and a J- or Y-shaped spermatheca – and isfurthermore differentiated from related taxa by a unique combination ofdiagnostic features including the presence of premucro, a complete tegminalplate in males, the absence of longitudinal sclerites in the genital chamberof females, and an apical projection on the spermathecal cornu. Aphylogenetic reconstruction of 20 taxa (7 outgroup, 13 ingroup) and 25morphological characters yielded a single most parsimonious cladogram (L=61steps, CI=42, RI=74) with the ingroup topology (A. artus, (A. andersoni, (A.earinusparsus, (A. epipolevatus, A. wolcotti)))), (A. eximius, ((A.argentatus, A. mammuthus), (A. viridium, (A. stenoculus, (A. quisqueyanus,(A. adustus, A. empherefasciatus)))))). The phylogeny indicates thatAnypotactus bicaudatus Champion (Anypotactini Champion) is the sister groupto Apodrosus, thereby calling into question the traditional tribal placementof this genus in the Polydrusini. The host plant associations of mostspecies remain uncertain. A reconstruction of the historical biogeography ofApodrosus suggests that post-GAARlandia (Greater Antillean+Aves Ridges landspan) vicariance was an important factor in the diversification of thehigher-elevation inhabiting A. artus-A. wolcotti clade. Conversely, thespecies richness of the lower-elevation inhabiting A. eximius-A.empherefasciatus clade is most plausibly explained through a series ofindependent and likely more recent colonization events from the ancestralsource area of southwestern Hispaniola to several smaller western Caribbeanislands, or – in the case of Hispaniola – within-island areas ofendemism. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Insect Systematics & Evolution Brill

Revision, phylogeny and historical biogeography of the genus Apodrosus Marshall, 1922 (Coleoptera: Curculionidae: Entiminae)

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References (13)

Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
1399-560X
eISSN
1876-312X
DOI
10.1163/187631210X538799
Publisher site
See Article on Publisher Site

Abstract

AbstractThe Caribbean weevil genus Apodrosus Marshall, 1922 is revised, including aredescription of A. argentatus Wolcott, 1924 and A. wolcotti Marshall, 1922and description of 11 new species: A. adustus, sp.n. (Bahamas), A.andersoni, sp.n. (Dominican Republic), A. artus, sp.n. (Dominican Republic),A. earinusparsus, sp.n. (Dominican Republic), A. empherefasciatus, sp.n.(Bahamas), A. epipolevatus, sp.n. (Puerto Rico), A. eximius, sp.n.(Dominican Republic), A. mammuthus, sp.n. (Mona Island, Turks and CaicosIslands), A. quisqueyanus, sp.n. (Dominican Republic), A. stenoculus, sp.n.(Dominican Republic) and A. viridium, sp.n. (Dominican Republic). A key tothe species and illustrations of external and internal structures areprovided. Apodrosus is characterized as a monophyletic group by twounreversed synapomorphies – i.e., the presence of a median fovea on the apexof abdominal sternum VII and a J- or Y-shaped spermatheca – and isfurthermore differentiated from related taxa by a unique combination ofdiagnostic features including the presence of premucro, a complete tegminalplate in males, the absence of longitudinal sclerites in the genital chamberof females, and an apical projection on the spermathecal cornu. Aphylogenetic reconstruction of 20 taxa (7 outgroup, 13 ingroup) and 25morphological characters yielded a single most parsimonious cladogram (L=61steps, CI=42, RI=74) with the ingroup topology (A. artus, (A. andersoni, (A.earinusparsus, (A. epipolevatus, A. wolcotti)))), (A. eximius, ((A.argentatus, A. mammuthus), (A. viridium, (A. stenoculus, (A. quisqueyanus,(A. adustus, A. empherefasciatus)))))). The phylogeny indicates thatAnypotactus bicaudatus Champion (Anypotactini Champion) is the sister groupto Apodrosus, thereby calling into question the traditional tribal placementof this genus in the Polydrusini. The host plant associations of mostspecies remain uncertain. A reconstruction of the historical biogeography ofApodrosus suggests that post-GAARlandia (Greater Antillean+Aves Ridges landspan) vicariance was an important factor in the diversification of thehigher-elevation inhabiting A. artus-A. wolcotti clade. Conversely, thespecies richness of the lower-elevation inhabiting A. eximius-A.empherefasciatus clade is most plausibly explained through a series ofindependent and likely more recent colonization events from the ancestralsource area of southwestern Hispaniola to several smaller western Caribbeanislands, or – in the case of Hispaniola – within-island areas ofendemism.

Journal

Insect Systematics & Evolution – Brill

Published: Jan 1, 2010

Keywords: MORPHOLOGY; TAXONOMY; HISPANIOLA; CLADISTICS; COLONIZATION; CARIBBEAN; EVOLUTION

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