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17 results for “Drosophila obscura”
FIG. 15 in The Drosophila (Sophophora) obscura species group in the Americas (Diptera: Drosophilidae): review, revisions, and three new species
FIG. 15. Hypandrium, aedeagus and other appendages of representative species of the affinis subgroup (ventral views). A. D. narragansett (ASG 10: paralectotype, Massachusetts); B. D. olmeca (ASG 25: holotype); C. D. tolteca (ASG 23); D. D. narragansett (ASG: Virginia); E. D. olmeca (ASG 25: holotype, detail of B). A–C to same scale; D and E to same scale
FIG. 13 in The Drosophila (Sophophora) obscura species group in the Americas (Diptera: Drosophilidae): review, revisions, and three new species
FIG. 13. Epandria and associated structures in representative species of the pseudoobscura subgroup. A. D. cuauhtemoci (ASG 38); B. Detail of A; C. D. persimilis (ASG 36); D. Detail of C; E. D. zapoteca, n. sp. (ASG 20).
FIG. 12 in The Drosophila (Sophophora) obscura species group in the Americas (Diptera: Drosophilidae): review, revisions, and three new species
FIG. 12. Epandria and associated structures in representative species of the affinis subgroup. A. D. narragansett (ASG 10); B. Details of A; C. D. olmeca, n. sp. (ASG 25); D. Detail of C; E. D. tolteca (ASG 23).
FIG. 10 in The Drosophila (Sophophora) obscura species group in the Americas (Diptera: Drosophilidae): review, revisions, and three new species
FIG. 10. Protarsal male sex combs of species in the D. pseudoobscura subgroup. A. D. cuauhtemoci; B. D. lowei (ASG 40); C. D. maya (ASG 41); D. D. persimilis (ASG 36); E. D. pseudoobscura (ASG 35); F. D. zapoteca (ASG 01). All to the same scale.
FIG. 11 in The Drosophila (Sophophora) obscura species group in the Americas (Diptera: Drosophilidae): review, revisions, and three new species
FIG. 11. Epandria (male tergite VIII) and associated structures in representative species of the affinis subgroup. A. D. affinis (ASG 29); B. D. affinis, detail of A; C. D. azteca (ASG 13); D. D. chibcha, n. sp. (ASG 05).
FIG. 9 in The Drosophila (Sophophora) obscura species group in the Americas (Diptera: Drosophilidae): review, revisions, and three new species
FIG. 9. Protarsal male sex combs (tarsomeres ta1 and ta2, and ta3 for D. chibcha from Peru) of species in the affinis subgroup. A. D. affinis (ASG 29); B. D. algonquin (ASG 32); C. D. athabasca (ASG 31); D. D. azteca (ASG 13: San Franciso, CA); E. D. azteca (ASG 06: Leticia, Colombia); F. D. chibcha, n. sp. (ASG 04: Zurqui, Costa Rica); G. D. chibcha, n. sp. (ASG 05: Las Alturas, Costa Rica); H. D. chibcha (ASG 07: Rancho Grande, Venezuela); I. D. chibcha (ASG 08: Wayqecha, Peru); J. D. narragansett (ASG 10); K. D. olmeca (ASG 25); L. D. tolteca (ASG 23). All to the same scale.
FIG. 5 in The Drosophila (Sophophora) obscura species group in the Americas (Diptera: Drosophilidae): review, revisions, and three new species
FIG. 5. Frontal view of heads of Drosophila narragansett (including seminole, new synonym) and the related species D. olmeca, n. sp. A. D. narragansett, female paralectotype (ASG 11); B. D. narragansett, male paralectotype (ASG 10); C. D. seminole, male holotype; D. D. olmeca, n. sp., male holotype (ASG 25).
FIG. 8 in The Drosophila (Sophophora) obscura species group in the Americas (Diptera: Drosophilidae): review, revisions, and three new species
FIG. 8. Oviscapts and spermathecae (lateral views) of species in the pseudoobscura subgroup, with a detail for D. persimilis. A. D. cuauhtemoci (ASG 39); B. D. lowei (ASG 26); C. D. maya (ASG 19); D. D. persimilis (ASG 37); E. D. pseudoobscura (ASG 34); F. D. zapoteca (ASG 21).
FIG. 4 in The Drosophila (Sophophora) obscura species group in the Americas (Diptera: Drosophilidae): review, revisions, and three new species
FIG. 4. Frontal view of heads of representative species of the affinis subgroup. A. D. affinis, male. B. D. chibcha, n. sp., male holotype (ASG 05); C. D. tolteca, male (ASG 23); D. zapoteca, n. sp., male holotype (ASG 20). Note differences in development of the facial carina compared with faces in figure 3.
FIG. 7 in The Drosophila (Sophophora) obscura species group in the Americas (Diptera: Drosophilidae): review, revisions, and three new species
FIG. 7. Oviscapts and spermathecae (lateral views) of species in the affinis subgroup, with apical details for three species. A. D. affinis (ASG 28); B. D. athabasca (ASG 30); C. D. azteca (ASG 15); D. D. chibcha, n. sp. (ASG 17); E. D. dobzhanskii (ASG 33); F. D. narragansett (ASG 11); G. D. tolteca (ASG 24).
FIG. 1 in The Drosophila (Sophophora) obscura species group in the Americas (Diptera: Drosophilidae): review, revisions, and three new species
FIG. 1. Distribution map of species in the affinis subgroup. Distributions derived from Miller (1958), M. Miller et al. (2017), new records provided in the present paper, and more recent published reports. For distributions of species in the pseudoobscura group, see Dobzhansky and Epling (1944) and Heed and O'Grady (2000). Distribution boundaries are approximate, especially northernmost boundaries.
FIG. 2 in The Drosophila (Sophophora) obscura species group in the Americas (Diptera: Drosophilidae): review, revisions, and three new species
FIG. 2. Heads and thoraces (lateral view) of representative New World species of the obscura group (A–D), and a male midleg of D. cuauhtemoci (E). A. D. chibcha holotype, n. sp. (ASG 05); B. D. maya holotype. C. D. narragansett paralectotype male. D. D. seminole holotype. E. D. cuauhtemoci, male midleg (lateral view), paratype.
Reproductive ecology of Drosophila obscura: A cold adapted species
<p>The study of insect reproductive ecology is essential to determine species distributions and fate under changing environments. Species adapted to harsh environments are good examples to investigate the reproductive mechanisms that allow them to cope with the challenging conditions. We here focus on studying for the first time the reproductive ecology of a cold-adapted<em> D. obscura</em> strain collected in Finland (subarctic climate region). We tested several reproductive traits such as fertility and fecundity to observe the onset of reproduction and gauge when sexual maturity is reached in both males and females. We combined these measures with an analysis of changes of their reproductive organs shortly after eclosion. We found that males matured several days before females and that this process was underpinned by female egg maturation and male accessory gland growth, while sperm was already present in two-day old males. This delayed maturation is not observed to the same extent in other closely related species and might be a signature of exposure to harsh environments. Whether this delay is an adaptation to cope with variation in resource availability or prolonged unfavorable temperatures is though not clear. Finally, our study adds to the set of reproductive mechanisms used by cold adapted species and the information presented here contributes to understanding the breadth of Drosophila reproductive ecology.</p>
Reproductive ecology of Drosophila obscura: A cold adapted species
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FIG. 16 in The Drosophila (Sophophora) obscura species group in the Americas (Diptera: Drosophilidae): review, revisions, and three new species
FIG. 16. Hypandrium, aedeagus and other appendages of representative species of the pseudoobscura subgroup. A. D. cuauhtemoci (ASG 38); B. D. maya (ASG 02: Guatemala), with details of pregonite lobes; C. D. persimilis (ASG 36); D. D. zapoteca, n. sp. (ASG 20: holotype)
FIG. 14 in The Drosophila (Sophophora) obscura species group in the Americas (Diptera: Drosophilidae): review, revisions, and three new species
FIG. 14. Hypandrium, aedeagus and other appendages of representative species of the affinis subgroup (ventral views). The valves of the aedeagal sheath and the pair of hypandrial lobes are highlighted in color; the postgonites are not. A. D. affinis (ASG 29) (hypandrial lobes hidden); B. D. athabasca (ASG 31); C. D. algonquin (ASG 32); D. D. chibcha, n. sp. (ASG 05), with detail of aedeagal valves of ASG 05 (above), and ASG 08 (below). All to the same scale except details of D. chibcha.
FIG. 3 in The Drosophila (Sophophora) obscura species group in the Americas (Diptera: Drosophilidae): review, revisions, and three new species
FIG. 3. Frontal view of heads of representative species in the D. pseudoobscura subgroup. A. D. lowei, male paratype (A19.2); B. D. maya, male holotype (44.12A). C. D. pseudoobscura, male. D. cuauhtemoci, male paratype (face and antennae only) (ASG 39).
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