Diomus notescens, copyright Geoff Walker.

Belongs within: Coccinellidae.

The Diomini are a cosmopolitan group of smaller, hairy ladybird beetles characterised by postcoxal lines on the first abdominal ventrite merging with the rear margin of the ventrite (Ślipiński 2007).

Characters (from Ślipiński 2007): Small to medium-sized (2–4 mm). Body convex, brown or black, sometimes with colour pattern; winged or wingless; dorsum shortly setose; antennal insertions exposed; antennal groove on underside weak. Eye large, finely facetted, without ocular canthus, interfacetal setae absent. Mandible bidentate apically; prostheca and mola present. Maxillary palp short and stout, terminal palpomere expanded to securiform. Antenna slightly shorter than head, ten- or eleven-segmented, with three-segmented club, scape slim. Pronotum transverse, hypomeron without foveae; prosternum long in front of coxae; prosternal process moderately broad, usually carinate. Meso-metaventrite broadly articulated, usually arcuate anteriorly with metaventrite extending well forward and making mesoventrite very short. Tarsi three- or four-segmented. Abdomen with six ventrites; abdominal postcoxal line at abdominal ventrite merging with hind margin. Ovipositor with coxites transverse, stylus absent; spermatheca complex, worm-like; infundibulum and bursal plate present. Penis with distinct capsule, often complex; penis guide asymmetrical.

<==Diomini S07
    |--Decadiomus Chapin 1933 S07
    |--Andrzej Ślipiński 2007 S07
    |    `--*A. antennatus Ślipiński 2007 S07
    |--Dichaina Weise 1850 S07
    |    `--*D. inornata Weise 1923 S07
    `--Diomus Mulsant 1850 [incl. Amidellus Weise 1923, Heterodiomus Brèthes 1924] S07
         |--*D. thoracicus (Fabricius 1801) [=Coccinella thoracica] S07
         |--D. australasiae (Blackburn 1892) [=Scymnus australasiae] S07
         |--D. brisbanensis (Blackburn 1895) [=Scymnus brisbanensis] S07
         |--D. casuarinae (Blackburn 1889) [=Scymnus casuarinae] S07
         |--D. corticalis (Lea 1908) [=Scymnus corticalis] S07
         |--D. cowleyi (Blackburn 1895) [=Scymnus cowleyi] S07
         |--D. cucullifer (Blackburn 1892) [=Scymnus cucullifer] S07
         |--D. denhamensis Weise 1929 [=D. labiatus Weise 1908 (preoc.)] S07
         |--D. elutus (Lea 1902) [=Scymnus elutus] S07
         |--D. ementitor (Blackburn 1895) [=Scymnus ementitor, *Amidellus ementitor] S07
         |--D. ferrugineus Weise 1895 S07
         |--D. flavolaterus (Lea 1926) [=Scymnus flavolaterus] S07
         |--D. frater (Lea 1902) [=Scymnus frater] S07
         |--D. hamatus Weise 1895 S07
         |--D. hypocritus Weise 1923 S07
         |--D. impictus (Blackburn 1895) [=Scymnus impictus] S07
         |--D. inaffectatus (Blackburn 1892) [=Scymnus inaffectatus] S07
         |--D. indistinctus (Lea 1902) [=Scymnus indistinctus] S07
         |--D. insidiosus (Blackburn 1889) (see below for synonymy) S07
         |--D. inusitatus (Blackburn 1889) [=Scymnus inusitatus] S07
         |--D. jocosus (Blackburn 1892) [=Scymnus jocosus] S07
         |--D. kamerungensis (Blackburn 1895) [=Scymnus kamerungensis] S07
         |--D. lubricus (Blackburn 1889) [=Scymnus lubricus] S07
         |--D. macrops (Lea 1929) [=Scymnus macrops] S07
         |--D. maestus (Lea 1926) [=Scymnus maestus] S07
         |--D. mimicus (Lea 1902) [=Scymnus mimicus] S07
         |--D. notescens (Blackburn 1889) [=Scymnus notescens; incl. D. rusticus Weise 1895] S07
         |--D. obumbratus (Blackburn 1895) [=Scymnus obumbratus] S07
         |--D. operosus (Blackburn 1895) [=Scymnus operosus] S07
         |--D. planulatus (Blackburn 1895) [=Scymnus planulatus] S07
         |--D. poonindiensis (Blackburn 1889) [=Scymnus poonindiensis] S07
         |--D. pumilio (Weise 1885) (see below for synonymy) S07
         |--D. robustus Weise 1895 [=D. major Weise 1895 non Scymnus insidiosus var. major Blackburn 1889] S07
         |--D. scapularis (Weise 1885) [=Scymnus (Diomus) scapularis; incl. S. aurugineus Blackburn 1889] S07
         |--D. sedani (Blackburn 1889) [=Scymnus sedani] S07
         |--D. simplex (Blackburn 1889) [=Scymnus simplex] S07
         |--D. sphragitis (Weise 1885) (see below for synonymy) S07
         |--D. striatus (Lea 1902) [=Scymnus striatus] S07
         |--D. subclarus (Blackburn 1895) [=Scymnus subclarus] S07
         |--D. subelongatulus (Blackburn 1892) [=Scymnus subelongatulus] S07
         |--D. sydneyensis (Blackburn 1892) [=Scymnus sydneyensis] S07
         |--D. tenebricosus (Boheman 1859) [=Scymnus tenebricosus] S07
         |--D. triangularis (Lea 1902) [=Scymnus triangularis] S07
         |--D. trilobus (Lea 1902) [=Scymnus trilobus] S07
         |--D. variiceps (Lea 1929) [=Scymnus variiceps] S07
         `--D. whittonensis (Blackburn 1892) [=Scymnus whittonensis] S07

Diomus insidiosus (Blackburn 1889) [=Scymnus insidiosus, S. blackburni Weise 1929; incl. S. insidiosus var. major Blackburn 1889, S. insidiosus var pallipes Blackburn 1889] S07

Diomus pumilio (Weise 1885) [=Scymnus (Diomus) pumilio; incl. S. flavifrons Blackburn 1889, Diomus flavifrons, S. flavifrons var. norfolcensis Lea 1929, S. flavifrons var. occidentalis Blackburn 1889, S. flavifrons var. victoriae Blackburn 1889] S07

Diomus sphragitis (Weise 1885) [=Scymnus (Diomus) sphragitis; incl. S. meyricki Blackburn 1889, S. meyricki var. obscuripes Blackburn 1889] S07

*Type species of generic name indicated


[S07] Ślipiński, A. 2007. Australian Ladybird Beetles (Coleoptera: Coccinellidae): Their biology and classification. Australian Biological Resources Study: Canberra.

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