A review of fossil taxa of Microphorinae (Diptera, Dolichopodidae sensu lato), with redescription of the Eocene genus Meghyperiella Meunier
Author
Shamshev, Igor V.
Zoological Institute, Russian Academy of Sciences, Universitetskaya nab. 1, St. Petersburg 199034, Russia.
Author
Perkovsky, Evgeny E.
Schmalhausen Institute of Zoology NAS of Ukraine, vul. B. Khmelnytskogo, 15, Kiev, 01030 Ukraine. & Borissiak Paleontological Institute, Russian Academy of Sciences, Moscow, 117997, Russia
text
Zootaxa
2022
2022-06-08
5150
3
411
427
journal article
72886
10.11646/zootaxa.5150.3.6
c8c16c97-1eae-42d2-9ab3-750dc14ea775
1175-5326
6623125
D59052B5-85CD-466F-B4EB-812226DC913E
Curvus
Kaddumi
Curvus
Kaddumi, 2005: 85
(
2007: 121
)
.
Type
species:
Curvus khuludi
Kaddumi, 2005
, by original designation.
Included species.
Curvus khuludi
Kaddumi, 2005: 85
(
2007: 121
; as “
khuludae
”, only male) (
Jordan
(Lower Cretaceous)).
Remarks.
Kaddumi (2005
,
2007
) distinguished this genus to include a single species,
C
.
khuludi
(also as “
khuludae
”), described from the amber of
Jordan
,
Zarqa
River basin, Lower Cretaceous (between 124–140 Ma). However, proper comparison of this taxon with other groups of microphorines was not provided.
According to the original description,
Curvus khuludi
differs from all fossil microphorines primarily by an eye covered with ommatrichia. This condition is considered as apomorphic (but highly homoplasious) in
Empidoidea
(e.g.,
Sinclair & Cumming 2006: 21
, character 2). Within
Dolichopodidae
sensu
lato
this character is present in the most
Parathalassiinae
(except extinct
Cretomicrophorus
,
Archichrysotus
and
Retinitus
),
Dolichopodidae
sensu
stricto
, as well as in some recent species of
Schistostoma
Becker
of the microphorines (
Shamshev & Sinclair 2006
;
Shamshev 2020
;
Cumming & Brooks 2019
;
Brooks & Cumming 2022
). The compound eyes of
C
.
khuludi
are rather dichoptic (apomorphic). The author noted that “frons narrow and decreasing in width toward antennae, eyes meet above antennae” (i.e., eye margins converging toward antennae) (
Kaddumi 2007: 122
). This condition may resemble that described in
Avenaphora
and
Pristinmicrophor
. Although, in both these genera the eyes are separated by the frons above the antennae and ommatidia are equally small. In addition,
C
.
khuludi
possesses unusually short, subtriangular postpedicel. However, a similarly short postpedicel was described in the Upper Cretaceous (Burmese amber)
Microphorites pouilloni
(
Ngô-Muller
et al
. 2020
)
and in the recent
Schistostoma indicum
(
Shamshev 2020
)
. The wing venation of
C
.
khuludi
appears to match with that of the
Microphor
genera group (
Kaddumi 2007: 121
, fig. 89), although the posterior part is not quite clear. The condition of the prothoracic sclerites and costal vein (circumambient
versus
ending near wing tip) remains unknown. Refer to additional notes under
Pristinmicrophor
.