Integrated taxonomy, biology and biogeography of the Afrotropical genus Xyloctonus (Coleoptera, Curculionidae, Scolytinae)
Author
Jordal, Bjarte H.
https://orcid.org/0000-0001-6082-443X
Department of Natural History, University Museum of Bergen, University of Bergen, P. O. 7800, NO- 5020 Bergen, Norway
bjarte.jordal@uib.no
text
Deutsche Entomologische Zeitschrift
2024
2024-03-01
71
1
67
84
http://dx.doi.org/10.3897/dez.71.116185
journal article
http://dx.doi.org/10.3897/dez.71.116185
1860-1324-1-67
E85152C02B484B15A49F776D7CD4CBA4
FD4B949748C951B7BA73F9A359A1B29C
Xyloctonus subcostatus Eggers, 1939
Figs 26
, 27
, 29
, 30
, 32
, 33
Xyloctonus subcostatus
Eggers, 1939: 15.
Xyloctonus striatus
Eggers, 1939: 18, syn. nov.
Type material.
Holotype
: Deutsch Ost Afrika [Tanzania], Bez. Tabora, Ngulu [-3.72, 32.46], vi. 1911, sammler W. Methner [USNM].
Paratypes
of
X. striatus
: Mozambique,
Sangadze
, Moulima [-17.4, 35.0], sur
Acacia
, 1928, P. Lesne [MNHN, NHMW].
Diagnosis.
Length 1.7-2.8 mm, 2.0
x
as long as wide, colour brown; antennal club with two visible procurved sutures; male vertex with a simple pars stridens (Fig.
32
); anterior margin of pronotum with two raised teeth; pronotum slightly narrower than elytra; elytral interstriae 9 curves above the posterior margin of elytra and continues to elytral suture; interstriae lightly punctured; scutellar shield broad, slightly impressed in middle, roughly punctured; elytral suture with bulgy locking mechanism; setae on lateral upper part of metaventrite bifid.
Figures 25-33.
Dorsal, lateral and front view of holotype of
X. pubifer
(
25, 28, 31
); paratype of
X. subcostatus
(
26, 29, 32
); paratype of
X. striatus
(synonym of
X. subcostatus
) (
27, 30, 33
).
Distribution.
Mozambique, Tanzania, Sudan, Democratic Republic of the Congo (new country record) Guinea, Burkina Faso (new country record).
New records.
Burkina Faso, Comoe, Foret de Boulon, 270 m alt.,
10.343
,
-4.510
, 9.7.2006, F. Genier leg. [2, Genier coll.]; Democratic Republic of the Congo, Moba, 780 m alt.,
-7.030
,
29.763
, 01.10.1953, H. Bomans leg. [1, RMCA].
A specimen from the Democratic Republic of Congo [RMCA] was erroneously identified by Schedl as
X. scolytoides
.
Biology.
Collected from an
Acacia
(
Fabaceae
) branch (identified as
X. striatus
). Two males were collected by a Malaise trap in Burkina Faso, in a dry bushland. The records from south-eastern parts of the Democratic Republic of the Congo, Sudan and Guinea are also from very dry forests below 1000 m altitude. Although present on one of Eggers
'co-types'
(paratypes), the male pars stridens is here reported for the first time.
Comments.
Paratypes (
'co-types'
) of
X. striatus
are identical to
X. subcostatus
, except elytral interstriae 9 is a little less separated from the elytral apex.