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Revision of A sian species of the D rosophila melanica species group ( D iptera: D rosophilidae), with a description of a new species from V ietnam
Author(s) -
Suwito Awit,
Toda Masanori J.,
Takamori Hisaki,
Harada Kaori,
Watabe Hideaki
Publication year - 2014
Publication title -
entomological science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 28
eISSN - 1479-8298
pISSN - 1343-8786
DOI - 10.1111/ens.12028
Subject(s) - biology , population , zoology , genetics , demography , sociology
Abstract A new species of the D rosophila ( D rosophila ) melanica species group ( D iptera: D rosophilidae), D rosophila denruoi S uwito & W atabe, sp. nov., is described from northern V ietnam. It is proved by crossing experiments that reproductive isolation is complete between this species and other morphologically similar species. Larval ganglion cells of D . denruoi possess 2 n = 12 chromosomes, comprised of four pairs of acrocentric, one pair of metacentric and one pair of micro‐chromosomes. This is the largest number of acrocentric chromosomes in the group and implies that the species has the most primitive chromosomal configuration in the melanica group. Based on the results of crossing experiments and close morphological examination, D rosophila pengi O kada & K urokawa, 1957 from central J apan, once regarded as a synonym of D rosophila tsigana B urla & G loor, 1952, is shown to be distinct from D . tsigana . D rosophila pengi is thus resurrected as a member of the melanica group. We synonymize D rosophila bisetata T oda, 1988, described from central M yanmar, with D . pengi . In addition, a population from G uizhou, southwestern C hina, once regarded as D . tsigana , is also identified as D . pengi. These populations from central M yanmar and southwestern C hina share the diagnostic characters of D . pengi . At the same time, it is reconfirmed that the H okkaido population is conspecific with E uropean D . tsigana . Furthermore, another species, D rosophila longiserrata T oda, 1988 described from central M yanmar, is synonymized with D rosophila afer T an, H su & S heng, 1949 from C hina, based on their having identical karyotypes and external morphology.