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6 results for “Pontomyia”
Data from: Complete species phylogeny of the marine midge Pontomyia (Diptera: Chironomidae) reveals a cosmopolitan species and a new synonym
Pontomyia (Diptera: Chironomidae) is an exclusively marine and flightless insect genus with four described species from the Indo-Pacific and one undescribed taxon known only by its larvae, pupal skins and females from the western Atlantic. A previous study of relationships among three of the Indo-Pacific species reported each of them to be monophyletic, with high genetic diversity within P. natans Edwards, the type species, and P. pacifica Tokunaga. The evolutionary affinities of the Australian endemic P. cottoni Womersley that resembles P. natans, as well as the putative Atlantic species are hitherto undetermined. A complete molecular phylogeny of the genus based on two nuclear and two mitochondrial DNA markers indicates that P. cottoni and a Puerto Rican (Atlantic) larval population are nested within the P. natans clade. Furthermore, P. natans and P. cottoni are inseparable in all morphological characters used previously to distinguish them. Therefore, we synonymize P. cottoni with P. natans, syn. nov., whose known range now encompasses all three ocean basins after including the Puerto Rican population. This distribution warrants further investigation into the life history of Pontomyia, a midge with one of the shortest known adult lifespans among insects.
Figure 3 in The flightless marine midge Pontomyia (Diptera: Chironomidae): ecology, distribution, and molecular phylogeny
Figure 3. Maximum likelihood tree from four-gene analysis as performed in GARLI. The three values on each branch represent: (1) maximum likelihood bootstrap support; (2) Bayesian posterior probability (PP); and (3) maximum parsimony bootstrap support. Key: *bootstrap value> 98 or PP of 1; #maximum likelihood and maximum parsimony bootstrap values> 98 and PP of 1.
Figure 2 in The flightless marine midge Pontomyia (Diptera: Chironomidae): ecology, distribution, and molecular phylogeny
Figure 2. Photomicrographs showing the male hypogium of each Pontomyia species. A, Pontomyia natans from type series. B, Pontomyia pacifica P06 from Palau. C, Pontomyia cottoni from type series. D, Pontomyia oceana P25 from Taiwan. The scale bar at the bottom right applies to all panels.
Figure 4 in The flightless marine midge Pontomyia (Diptera: Chironomidae): ecology, distribution, and molecular phylogeny
Figure 4. Species tree obtained from BEST analysis of multilocus data. The value on each branch represents the Bayesian posterior probability.
Figure 1 in The flightless marine midge Pontomyia (Diptera: Chironomidae): ecology, distribution, and molecular phylogeny
Figure 1. Map showing the known collection sites of Pontomyia species:, Pontomyia natans; Δ, Pontomyia pacifica; Z, Pontomyia cottoni; O, Pontomyia oceana;, Atlantic Pontomyia sp. (filled symbols indicate type localities). Note that P. natans co-occur with P. pacifica at the type locality of the latter, whereas P. natans and P. oceana co-occur in southern Taiwan.
Data from: Complete species phylogeny of the marine midge Pontomyia (Diptera: Chironomidae) reveals a cosmopolitan species and a new synonym
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