Multiple origins of moss-inhabiting flea beetles (Coleoptera: Chrysomelidae): molecular phylogeny, overview of genera and a new genus from Africa
Author
Damaška, Albert František
Author
Konstantinov, Alexander
Author
Fikáček, Martin
text
Zoological Journal of the Linnean Society
2022
2022-02-07
196
647
676
journal article
10.1093/zoolinnean/zlab112
eb68c3ad-c51a-4828-8a1f-314ed0ba6454
0024-4082
7196247
1C9A93CC-F5BE-427B-95B4-B2B9A1F51B46
BENEDICTUS
SCHERER, 1969
(
FIG. 4
)
Type
species:
Benedictus elisabethae
Scherer, 1969
.
Synonymy: Himalalta
Medvedev, 1990 (synonymized by
Sprecher-Uebersax
et al
., 2009
).
Phylogenetic position:
The genus belongs to the
Manobia
generic group, together with the winged and leaf-surface-living genera
Aphthonoides
Jacoby, 1885
,
Manobia
Jacoby, 1885
and
Phyllotreta
Chevrolat, 1836
. The sister-group of
Benedictus
is the morphologically similar new African moss-inhabiting genus
Benedictoides
.
Diversity and distribution:
Twenty-eight species of
Benedictus
are described. The genus is mainly distributed in the Oriental region, where it clearly shows a ‘Himalayan’ pattern of distribution, with the centre of diversity in the Himalayas and adjacent lower mountain ranges in
Thailand
and
China
. It also reaches the
Philippines
(Luzon). Species of
Benedictus
are not yet known from any high mountain areas of Sundaland (like Mt. Kinabalu on Borneo or the mountain ranges of Sumatra), but a single species is known from southern
India
and one from New
Guinea
. However, the Papuan species (
B. andersoni
Sprecher-Uebersax
et al.
, 2009
) is highly divergent from other
Benedictus
species
in its morphology and its generic status shall be, therefore, considered carefully.
Revisions:
The genus was revised by SprecherUebersax
et al
. (2009).
Morphological characteristics:
The beetles are generally tiny (
1–3 mm
) with relatively distinct morphological diagnosis (
Sprecher-Uebersax
et al.
, 2009
). Body elongate to oval, colour usually brown, in some species light brown with dark colour pattern on elytra. Head with distinct supracallinal sulci and frontal calli, antennae usually long, reaching almost the midlength of elytra. Pronotum massive, convex, in some species longer than broad or subquadrate, with distinct anterior pronotal edges. Pronotal disc bearing, usually, an antebasal transverse impression with a stripe of distinct punctures, sometimes, impression shallow or even absent. Some species have short, basal, longitudinal, pronotal impressions. Procoxal cavities open posteriorly. Elytra usually convex and (in most species) strongly punctate; punctures usually forming 11 longitudinal striae. Wings absent. Humeral calli usually absent or feeble, sometimes surrounded with a row of punctures anteriorly. Metatibiae straight, bearing an apical spur. Abdomen forming a flat process reaching metacoxae. Aedeagus usually long and slender, spermatheca in most species with a long and strongly curved duct, sometimes with many coils. Vaginal palpi parallel, with apices close together.
Ecology:
Many species of
Benedictus
were found by sifting moss or leaf litter at high altitudes, sometimes even around
4000 m
a.s.l. Thus, members of the genus are believed to be moss-inhabiting (
Sprecher-Uebersax
et al.
, 2009
). Interestingly, one species was recently also found in mid-elevation mountain habitats of
Hong Kong
, where it was collected using pitfall traps (
DamaŠka & Aston, 2019
).
Remarks:
The genus resembles the Himalayan and Chinese genera
Loeblaltica
Scherer, 1989
and
Microcrepis
Chen, 1933
, which are flightless and leaflitter-inhabiting. The genus
Microcrepis
differs from
Benedictus
especially in having closed procoxal cavities, compared to the open ones in
Benedictus
.
Loeblaltica
can be distinguished from
Benedictus
by having round metatibia in cross-section, not having a channel dorsally and by having triangular frons (SprecherUebersax
et al.
, 2009).
Benedictus
can be separated from the similar African genus
Benedictoides
, based on the diagnosis provided below.