New species of Ochodaeus Dejean from Madagascar II (Coleoptera: Scarabaeoidea: Ochodaeidae)
Author
Paulsen, M. J.
text
Insecta Mundi
2019
2019-05-31
706
706
1
10
journal article
10.5281/zenodo.3673403
f01c9bd1-7635-40c7-b5ee-5fc57320b880
1942-1354
3673403
08CB0DA0-C83E-438F-AA97-8CD637F044A5
Updated key couplets to
Ochodaeus
spp. in
Madagascar
The following couplet changes to the species key in
Paulsen (2019)
allow for determination of all Madagascan species having a granulate pronotum, including the three newly described species.
2(1). Elytral intervals with setose tubercles of 2 sizes, with setae of larger tubercles flattened, scale-like........................................................
O. pygmaeus
Paulian
— Elytral intervals with tubercles either absent or of uniform size and without flattened setae.
3
3(2). Clypeus with median tubercle or small horn that is distinct from anterior margin (
Fig. 4–6
)...........................................................................
4
— Clypeus lacking free tubercle or horn, anterior margin usually thickened medially (
Fig. 7–8
).
6
4(3). Mentum with a knobby protuberance on each side (
Fig. 1d
)....
O. meridialis
Paulsen
,
n. sp.
— Mentum lacking protuberances laterally............................................
5
Figures 4–8.
Key characters of Madagascar
Ochodaeus
species.
4)
Head of
O. meridialis
Paulsen
,
n. sp.
, showing central tubercle of clypeus.
5)
Head of
O. umbonulus
Paulsen
,
n. sp.
, showing tubercle anterior to straight frontoclypeal suture.
6)
Head of
O. iniquipes
Paulsen
,
n. sp.
, showing minute horn on posteriorly curved frontoclypeal suture.
7)
Head of
O. isoanalensis
Paulian
showing broadly thickened clypeal margin.
8)
Head of
O. miliaris
(Klug)
, showing narrowly thickened clypeal margin.
5(4). Clypeus (
Fig. 5
) with median tubercle anterior to frontoclypeal suture; anterior margin of clypeus indistinct and eroded medially........................
O. umbonulus
Paulsen
,
n. sp.
— Clypeus (
Fig. 6
) with small horn located on frontoclypeal suture; anterior margin of clypeus distinct and entire throughout..........................
O. iniquipes
Paulsen
,
n. sp.
6(3). Median thickening of clypeal bead variable, lateral thickening always evident (
Fig. 7
); body length usually> 9.0 mm........................................
O. isoanalensis
Paulian
— Median thickening of clypeal bead simply convex, bead slender laterally (
Fig. 8
); body length usually 4.5–8.0 mm............................................
O. miliaris
Klug