A revision of the genera and species of the Neotropical family Mesembrinellidae (Diptera: Oestroidea)
Author
Whitworth, Terry L.
Author
Yusseff-Vanegas, Sohath
text
Zootaxa
2019
2019-08-26
4659
1
1
146
journal article
25918
10.11646/zootaxa.4659.1.1
0cbe0b8e-2019-4f5a-8336-2d4d9fcd8bf6
1175-5326
3377239
57309E14-0330-4ED7-BCDA-355EE6618215
Key to species-groups of
Mesembrinella
1 Anterior thoracic spiracle with a broad oval opening above (
Fig. 5
); discal scutellar setae usually present (as in
Fig. 194
); disc of T5 with or without a row of discal setae (
Fig. 8
shows T5 with row of discal setae) (not to be confused with discal setae on the scutellum); most species with
3x
3 postpronotal setae......................................................
2
- Anterior thoracic spiracle with a long, narrow opening gradually widening above (
Fig. 6
); discal scutellar setae absent; disc of T5 without row of stout setae; with
2x
2 postpronotal setae...........
M. bolivar
group
[four species; formerly
Giovanella
]
2 Male
with epandrium large and elongate, broadly divided dorsally over its full length (as in
Figs 104
,
491
), with surstyli and cerci tiny and at posterior end (
Figs 27, 29
); sternites much wider than long (ST4 about
4x
wider than long), posterior edge of ST5 with pair of posteriorly-pointed projections midway [
Fig 12
(see arrow),
Figs. 245–246
]; sternites shorter and partially hidden in
M. mexicana
sp. nov.
(
Fig. 245
) [for lone females, terminalia should be dissected and examined; two species,
M. mexicana
sp. nov.
and
M. spicata
, are similar (
Figs 289–290
), the other,
M. guaramacalensis
sp. nov.
, is as in
Fig. 288
].............................................................
M
.
spicata
group
[three species; formerly
Henriquella
]
- Male with epandrium smaller, surstyli and cerci more typical, as in
Figs 35–98
, except
M. anomala
(
Figs 99–100
); sternites much narrower, often longer than wide, ST1–4 never more than
2x
wider than long (
Figs 247–279
); posterior edge of ST5 without projections....................................................................................
3
3 Disc of T5 with horizontal row of stout setae (
Fig. 8
), rest of T5 with fine setulae. Male: surstylus usually more or less straight, parallel-sided; cercus curved anteriorly (as in
Fig. 39
); phallus usually significantly narrowed just anterior to hypophallic lobe (as in
Fig. 130
)......................................
M
.
aeneiventris
group
[13 species; formerly
Huascaromusca
]
- Disc of T5 without horizontal row of stout setae midway, with short- to medium-length fine setae and setulae over whole surface, dense in most species but sparser in a few species; surstylus and cercus usually curving toward each other in lateral view (as in
Fig. 63
); phallus usually not significantly narrowed anterior to hypophallic lobe (
Fig. 148
)......................
4
4 Stem vein setose (
Fig. 489
); wing with dark infuscation along costa from subcosta-costa junction to R
2+3
-costa junction, including all of r
1
cell; section IV of wing 0.30 (0.27–0.33/5) of section III; male frons broad, 0.20 of head width at narrowest; cerci in posterior view right-angled midway (
Fig. 26
); female terminalia as in
Fig. 287
; [known only from
Brazil
].....................................................................
M
.
latifrons
group
[1 species; formerly
Albuquerquea
].
- Stem vein usually bare; if setose, then other combination of characters different....................................
5
5 Male
: T5 1.5–
2x
as long as T4 (as in
Fig. 496
); terminalia very unusual, with surstylus short and broad and cercus small and slender (
Figs 99–100
). Female T6 of FU shape with broad division midway (
M. anomala
,
Fig. 324
; condition unknown in
M. andina
).................................................
M
.
anomala
group
[2 species; formerly
Thompsoniella
]
- Male: T4 and T5 of equal length; terminalia unlike those in
Figs 99–100
. Female T6 without a broad division (except in
M. decrepita
)...................................................................
M
.
bicolor
group
[22 species].