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The genus Scaptodrosophila Duda part II: the coracina species group from East Asia, with morphological and molecular evidence (Diptera, Drosophilidae).

ABSTRACT: Eight new species of the Scaptodrosophila coracina species group are described from China: S. fuscilimbasp. n., S. fusciventriculasp. n., S. helvpectasp. n., S. longispinatasp. n., S. nigrolimbatasp. n., S. trivittatasp. n., S. ventriobscuratasp. n., and S. zebrinasp. n. One known species S. coracina (Kikkawa & Peng) is redescribed. A key to all the examined species in the coracina group is provided. Species delimitations have been improved by integrating the DNA sequences with morphological information. The intra- and interspecific pairwise p-distances (proportional distance) are summarized. Some nucleotide sites with fixed status in the alignment of the COI sequences (662 nucleotide sites in length) are used as "pure" molecular diagnostic characters to delineate species in the coracina group.

SUBMITTER: Liu YQ

PROVIDER: S-EPMC5904429 | biostudies-literature |

REPOSITORIES: biostudies-literature

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The genus Scaptodrosophila Duda part I: the brunnea species group from the Oriental Region, with morphological and molecular evidence (Diptera, Drosophilidae).

Project description:Seven new species of the Scaptodrosophila brunnea species group are described from east Asia: S. maculatasp. n., S. melanogastersp. n., S. nigricostatasp. n., S. nigripectasp. n., S. obscuratasp. n., S. protenipenissp. n. and S. rhinasp. n. Three known species, S. parabrunnea (Tsacas & Chassagnard), S. pressobrunnea (Tsacas & Chassagnard) and S. scutellimargo (Duda) are redescribed. A key to all the examined species in the brunnea group is provided. Species delimitations have been improved by integrating the DNA sequences with morphological information. The intra- and interspecific pairwise p-distances (proportional distance) are summarized. Some nucleotide sites with fixed status in the alignment of the COI sequences (664 nucleotide sites in length) are used as "pure" molecular diagnostic characters to delineate species in the brunnea group.

| S-EPMC5523211 | biostudies-literature

Biogeography of Drosophila (Diptera: Drosophilidae) in East and Southeast Asia.

Project description:The causes of high biological diversity in biodiversity hotspots have long been a major subject of study in conservation biology. To investigate this matter, we conducted a phylogeographic study of five Drosophila (Diptera: Drosophilidae) species from East and Southeast Asia: Drosophila albomicans Duda, D. formosana Duda, D. immigrans Sturtevant, D. melanogaster Meigen, and D. simulans Sturtevant. We collected 185 samples from 28 localities in eight countries. From each collected individual, we sequenced the autosomal extra sex comb gene (esc) and seven mitochondrial genes, including nicotinamide adenine dinucleotide hydrate-reductase dehydrogenase subunit 4 (ND4), ND4L, tRNA-His, tRNA-Pro, tRNA-Thr, partial ND5, and partial ND6. Phylogenetic analyses using maximum- likelihood and Bayesian methods revealed interesting population structure and identified the existence of two distinct D. formosana lineages (Southeast Asian and Taiwanese populations). Genetic differentiation among groups of D. immigrans suggests the possibility of endemic speciation in Taiwan. In contrast, D. melanogaster remained one extensively large population throughout East and Southeast Asia, including nearby islets. A molecular clock was used to estimate divergence times, which were compared with past geographical events to infer evolutionary scenarios. Our findings suggest that interglacial periods may have caused population isolation, thus enhancing population differentiation more strongly for some of the Drosophila species. The population structure of each Drosophila species in East and Southeast Asia has been influenced by past geographic events.

| S-EPMC4535568 | biostudies-literature

The genus Scaptodrosophila Duda (Diptera, Drosophilidae), part III: the riverata species group from China, with morphological and molecular evidence for five new species.

Project description:A new species group, the riverata species group, is established within the genus Scaptodrosophila based on morphological and molecular evidence for five known and five new species from China: S. abdentata sp. nov., S. cederholmi (Okada, 1988), S. crocata (Bock, 1976), S. paraclubata (Sundaran & Gupta, 1991), S. platyrhina sp. nov., S. puncticeps (Okada, 1956), S. riverata (Singh & Gupta, 1977), S. serrateifoliacea sp. nov., S. sinuata sp. nov. and S. tanyrhina sp. nov. A key to this group is provided. Furthermore, 51 mtDNA COI sequences belonging to S. puncticeps, S. riverata and the five new species are used for verifying species boundaries defined by the morphological data.

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A new species group in the genus Dichaetophora, with descriptions of six new species from the Oriental region (Diptera, Drosophilidae).

Project description:The genus Dichaetophora Duda comprises 61 described species classified into four species groups: agbo, tenuicauda, acutissima and sinensis. This genus is distributed exclusively in the Old World, and is rich in species in the tropical and subtropical areas of the Oriental, Australasian, and Afrotropical regions. In this paper, a new species group, the trilobita group, is established for six new species discovered from the Oriental region. The delimitation of these species is firstly performed in light of morphology and further with the aid of DNA sequences of the mitochondrial COI and COII (cytochrome c oxydase, subunits I and II, respectively) genes, considering also their respective geographical origins. Then, the new species (trilobita Yang & Gao, sp. n., heterochroma Yang & Gao, sp. n., flatosternata Yang & Gao, sp. n., borneoensis Yang & Gao, sp. n., javaensis Yang & Gao, sp. n., and sumatraensis Yang & Gao, sp. n.) are described, and a key, based on not only morphological but also molecular information, is provided.

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Isotomidae of Japan and Asiatic part of Russia. II. The genus Tetracanthella of the Far East.

Project description:The paper considers new and little-known species of the genus Tetracanthella distributed in the Far East of Russia and in Japan. Sensillar chaetotaxy and labial palp, two less known morphological characters for the genus, are discussed. Two new species T.annulata sp. nov. and T.tardoki sp. nov. are described; T.manschurica Kutyreva, 1980 and T czernovae Kutyreva, 1980 are redescribed. For the latter species a lectotype and paralectotypes are designated. Remarks are provided for T.sylvatica Yosii, 1939. A second undescribed species is recorded for Japan. New records for T.orientalis Martynova, 1977 and T.sibirica Deharveng, 1987 are listed.

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Integrative taxonomy of the genus Pseudostegana (Diptera, Drosophilidae) from China, with descriptions of eleven new species.

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| S-EPMC6129143 | biostudies-other

Five new species of Drosophilaguarani group from the Andes of southern Ecuador (Diptera, Drosophilidae).

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| S-EPMC6160839 | biostudies-other

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