A review of Afrotropical Perasis Hermann, 1905 (Diptera: Asilidae: Laphriinae)
Author
Londt, Jason G. H.
text
Zootaxa
2007
2007-07-05
1521
9
18
journal article
49483
10.5281/zenodo.177463
eab8d711-9285-4aee-b640-57345547cad8
1175-5326
177463
Perasis carpenteri
Oldroyd
(
Figs 4–8
)
Perasis carpenteri
Oldroyd, 1970: 245–246
(
Uganda
;
Burundi
); 1980: 354 (catalogue entry).
General description: See
Oldroyd (1970)
.
Description of male genitalia (
Figs 4–8
:
Holotype
):
Genital capsule rotated clockwise through approx. 90° (degree and direction probably not significant – see
transvaalensis
). Epandrium in dorsal view (
Fig. 5
) slightly longer than wide (length: breadth ration = 1: 1.07), in lateral view (
Fig. 4
) broad, with broadly rounded proximal and distal ends and slightly curved. Proctiger in dorsal view (
Fig. 5
) clearly distally bilobed and projecting well beyond epandrial lobes. Hypandrium in ventral view tapering slightly to broadly curved distal end (
Fig. 6
). Gonocoxite in lateral view (
Figs 4–7
) with somewhat rectangular appearance, dorsal lobe robust (hidden from view in dry condition); gonostylus in lateral view (
Fig. 7
) with rounded apex bearing a slightly backwardly-directed dorsal spine. Aedeagal base in ventral view (
Fig. 8
) lacking distally directed projections.
FIGURES 4–8
.
Perasis carpenteri
Oldroyd, 1970
. Holotype male terminalia. 4. Lateral. 5. Dorsal. 6. Ventral view of hypandrium. 7. Gonocoxite lateral view. 8. Ventral. Scale line 1 mm.
Female not available for study.
TYPE
SPECIMENS.
Oldroyd (1970)
based his description on ‘
Holotype
♂.
Uganda
: Bunyoro,
v.1928
(
G. D. H. Carpenter
) (
BMNH
).
Paratypes
.
Urundi
: Kinanga, Ruzizi [River –
02°55’N
29°10’E
],
3♂
, 8Ψ,
xi.1951
(
F. J. F r a n ç o i s
) (FJF).’ No illustrations were provided.
MATERIAL STUDIED.
UGANDA
:
1♂
holotype
, ‘Holo- / type’, ‘
Perasis
/
maura
/ Mcq’, ‘
Uganda
/ Bunyoro [Kingdom of – 01°40N
31°30’E
] /
v.1928
/ G.D.H. Carpenter’, ‘
Perasis
/
carpenteri
Oldr.
/ det H. Oldroyd, 1964 / Holotype’ (
BMNH
).
Condition of
holotype
: Moderate, generally dirty. Head greasy, silvery mystical setae gummed up. Antennae lacking postpedicels. Thorax badly cracked down centre of mesonotum, probably the result of a large accumulation of verdigris around the pin within the thoracic cavity. Left hind leg missing beyond trochanter.
Distribution, phenology and biology. Known only from the East African
type
material collected at the type-locality in
Uganda
and one locality in
Burundi
. Collected in May and November. Biological data are not available. However, like
transvaalensis
(see below), this species may only be encountered in the vicinity of flowing water (Kinanga being on the eastern banks of the Ruzizi River between
Zaïre
and
Burundi
).