Macrostomus amazonensis

Rafael, José Albertino & Cumming, Jeffrey M., 2015, Revision of the genus Macrostomus Wiedemann (Diptera, Empididae, Empidinae). IV. The amazonensis species-group, Zootaxa 3947 (1), pp. 109-121 : 110-111

Key to species of the M. amazonensis species-group (male and female specimens)

1 Thorax yellow. Male terminalia yellow. Female terminalia white............................ M. albicaudatus sp. nov.

- Thorax predominantly black. Male and female terminalia black................................................ 2

2 Mesopleuron yellow adjacent to all coxae.................................................. M. acreanus sp. nov.

- Mesopleuron entirely black............................................................................. 3

3 Prosternum and part of propleuron yellow............................................... M. trombetensis sp. nov.

- Prosternum and propleuron entirely black................................................................. 4

4 Male terminalia with posterior cercus curved inwards ( Fig. 47 ). Female hind tibia without pinnate setae. Female fore coxa black, mid and hind coxae yellow. Female and sometimes male hind femur black and yellow banded.... M. xavieri sp. nov.

- Male terminalia with posterior cercus curved upwards ( Figs 20 , 31 ). Female hind tibia with pinnate setae along dorsal margin and basal third ventrally ( Figs 24 , 34 ). Female fore, mid and hind coxae yellow. Female and male hind femur black at apex only............................................................................................... 5

5 Male terminalia with hypandrium bearing acute protuberance posteriorly ( Fig. 22 ). Female sternite 8 around 2.2 times longer than wider ( Fig. 27 )................................................................ M. amazonensis sp. nov.

- Male terminalia with hypandrium lacking acute protuberance posteriorly ( Fig. 33 ). Female sternite 8 around 3 times longer than wider ( Fig. 37 )................................................................... M. paraiba sp. nov.

Figures

FIGURES 45 – 53. Macrostomus xavieri, sp. nov. 45 – 49, paratype ♂. 45, tergite 8, dorsal view, right setae omitted; 46, epandrium detached, lateral view (gray colored); 47, hypandrium and cerci (cerci gray colored, tergite 8 setae omitted), lateral view; 48, ventral projection of cerci with developed expansion, anterodorsal view; 49, cercal bridge connecting anterior cerci, anterodorsal view, setae omitted; 50 – 53, paratype ♀. 50, tergite 8 and sternite 8, lateral view, setae omitted; 51, tergite 8, dorsal view; 52, sternite 8, ventral view; 53, genital fork, ventral view. Abbreviations: AC, anterior cercus: BS, baciliform sclerite; VPC, ventral projection of cercus. Scales: 45 – 49, 50 – 52 = 0.2 mm; 53 = 0.1 mm.

FIGURES 18 – 28. Macrostomus amazonensis, sp. nov. 18 – 22, paratype ♂. 18, hindleg (femur, tibia and tarsomere 1); 19, tergite 8, dorsal view, setae omitted; 20, terminalia, lateral view (epandrium and cercal lobes gray colored, tergite 8 setae omitted); 21, cercal bridge connecting anterior cerci, anterodorsal view, setae omitted; 22, hypandrium, lateral view; 23 – 28, paratype ♀. 23, mid tibia; 24, hindleg (apex of femur, tibia and tarsomere 1); 25, tergite 8 and sternite 8, lateral view, setae omitted; 26, tergite 8, dorsal view; 27, sternite 8, ventral view; 28, genital fork, ventral view. Abbreviations: AC, anterior cercus. Scales: 18, 23 – 24 = 0.5 mm; 19 – 22, 25 – 27 = 0.2 mm; 28 = 0.1 mm.

FIGURES 29 – 38. Macrostomus paraiba, sp. nov. 29 – 33, paratype ♂. 29, hindleg (apex of femur, tibia and tarsomere 1); 30, tergite 8, dorsal view, right setae omitted; 31, terminalia, lateral view (epandrium and cercal lobes gray colored, tergite 8 setae omitted); 32, cercal bridge connecting anterior cerci, anterodorsal view setae omitted; 33, hypandrium and phallus, lateral view; 34 – 38, paratype ♀. 34, hind tibia and tarsomere 1; 35, tergite 8 and sternite 8, lateral view, setae omitted; 36, tergite 8, dorsal view; 37, sternite 8, ventral view; 38, genital fork, ventral view. Abbreviations: AC, anterior cercus. Scales: 29, 34 = 0.5 mm; 30 – 33, 35 – 37 = 0.2 mm; 38 = 0.1 mm.