Madecadryinus Olmi, 2007

Olmi, Massimo, Copeland, Robert S. & Noort, Simon Van, 2019, Dryinidae of the Afrotropical region (Hymenoptera, Chrysidoidea), Zootaxa 4630 (1), pp. 1-619 : 578-579

21. Genus Madecadryinus Olmi, 2007

Madecadryinus Olmi 2007c: 17 ; Azevedo et al. 2010: 885.

Type species. Madecadryinus relictus Olmi 2007 , by monotypy and original designation.

Diagnosis. ♀: apterous ( Figs 257A, 260A): palpal formula 2/2; maxillary palpi smaller than labial palpi; an- tenna geniculated; antennomeres 4–10 with ADOs (one per antennomere, except two ADOs in 10 th antennomere); occipital carina incomplete (complete on dorsal side of head and incomplete on temple); ocelli absent; mesosoma ( Figs 257A, 260A) composed almost completely of fused segment; only propleura mobile and articulated; rest of mesosoma laterally with incomplete suture between pronotum and mesothorax and incomplete meso-metapleural suture; posterior surface of mesosoma (corresponding to propodeal declivity) completely surrounded by strong suture; anterior dorsal region of mesosoma (corresponding to pronotum + mesonotum + metanotum + metapectalpropodeal disc) laterally with incomplete suture (always absent in anterior third and occasionally absent behind propodeal spiracles); apparent pronotum not crossed by transverse impression ( Figs 257A, 260A); epicnemium concealed; enlarged claw ( Fig. 258B) with small subapical and medial teeth and few bristles or slender lamellae (occasionally without teeth ( Fig. 261B)); protarsomere 5 ( Figs 258B, 261B) with rows of lamellae; tibial spurs 1/0/1. ♂ ( Figs 259, 260C): fully winged; forewing with C, R and 1Cu cells completely enclosed by pigmented veins; palpal formula 6/3; antenna very long, much longer than body; mandible with four irregular teeth; occipital carina complete; temple very long, much shorter than eye ( Fig. 260C); occiput deeply excavated ( Fig. 259); minimum distance between eyes and occipital carina much shorter than OOL ( Fig. 260C); epicnemium exposed; notauli complete; paramere without inner slender membranous process ( Fig. 258H); tibial spurs 1/1/2.

Distribution. Afrotropical region.

Hosts. Unknown.

World species. Seven species are known, all in the Afrotropical region.

Remarks. Based on the presence of an incomplete suture that is only laterally visible between the pronotum and mesothorax in ♀♀, the genus Madecadryinus is very similar to the Neotropical genus Apodryinus Olmi 1984 (in contrast the Australian genus Bocchopsis Olmi 1991 has the suture between pronotum and mesothorax complete and visible not only laterally, but also dorsally). The main differences between Apodryinus and Madecadryinus are in respect of the meso-metapleural suture (completely absent in Apodryinus , laterally partly present in Madecadryinus ), the occipital carina (absent in Apodryinus , almost complete in Madecadryinus ), the shape of the head (spheroidal in Apodryinus , cuboidal in Madecadryinus ), the eye (larger in Apodryinus , smaller in Madecadryinus ), the palpal formula (4/ 3 in Apodryinus , 2/ 2 in Madecadryinus ), the shape of the antennae (slenderer in Apodryinus , more thickened in Madecadryinus ), the ADOs (present in antennomeres 3–10 in Apodryinus , in 4–10 in Madecadryinus ), the enlarged claw (with lamellae and one subapical tooth in Apodryinus , with bristles or very slender lamellae and with small subapical and medial teeth in Madecadryinus ). Based on the absence of an inner slender process of the parameres, the ♂ of Madecadryinus is more similar to the ♂♂ of Apodryinus than those of Bocchopsis .

Key to species of Madecadryinus

♀♀ (unknown in M. ranomafanensis and M. silvanus )

1. Lateral suture of dorsal surface of mesosoma not present from propodeal spiracles to lateral corners of keel surrounding posterior inclined region ( Fig. 261A)............................................................. M. relictus Olmi

- Lateral suture of dorsal surface of mesosoma present from propodeal spiracles to lateral corners of keel surrounding posterior inclined region ( Fig. 261E)............................................................................. 2

2. Eye very small ( Fig. 261D); head more than eight × as long as eye............................... M. semicaecus Olmi

- Eye larger ( Figs 258A, C); head less than eight × as long as eye................................................ 3

3. Antenna slender ( Fig. 257A), with antennomere 6 longer than broad.............................. M. humicolus Olmi

- Antenna thicker ( Figs 257B, C), with antennomere 6 about as long as broad...................................... 4

4. Head and anterior surface of mesosoma dull, granulate........................................... M. opacus Olmi

- Head and anterior surface of mesosoma shiny, finely punctate and unsculptured among punctures......... M. politus Olmi

♂♂ (unknown in M. humicolus , opacus , politus and semicaecus )

1. Mesoscutum unsculptured or finely punctate and unsculptured among punctures (Fig. 262D); ocelli large (Fig. 262D)............................................................................................ M. silvanus Olmi

- Mesoscutum granulate; ocelli small or large ( Figs 259, 262A)................................................. 2

2. POL less than twice as long as OOL ( Fig. 260C)................................................ M. relictus Olmi

- POL about 3 × as long as OOL ( Fig. 258F).................. M. ranomafanensis Olmi, Copeland & van Noort , sp. nov.