Cragiosia, Volynkin, 2024

Cragiosia View in CoL gen. n.

https://zoobank.org/ urn:lsid:zoobank.org:act:0E0BE7B5-D8CA-4B91-A9D1-C5C43978BB8B

Type species: Ilema mesosticta Hampson, 1911 , by present designation.

Diagnosis. Species of the new genus ( Figs 7–14 View Figures 1–8 View Figures 9–16 ) display limited sexual dimorphism with the female having a somewhat broader forewing and are superficially reminiscent of females of Crocosia ( Figs 3, 6 View Figures 1–8 ), from which, however, they can easily be distinguished by the brown head and thorax (vs. rusty orange in Crocosia ), the forewing lacking the rusty orange basal suffusion, which is characteristic of Crocosia , and the paler hindwing with an intense brownish-grey suffusion terminally.

The male genital capsule of Cragiosia gen. n. ( Figs 20, 21 View Figures 20–22 ) is similar to Crocosia ( Figs 17–19 View Figures 17–19 ) with its swollen uncus and the valva lacking costal and saccular processes but is characterised by the presence of valvellae, which are proximally firmly articulated with the phallus wall making an indivisible intromittent complex ( Figs 27–29 View Figures 23–29 ). The similar valvella structure is known in the genus Cragia ( Figs 22 View Figures 20–22 , 26 View Figures 23–29 ) although both the male genital capsule configuration as well as female genitalia structure differ markedly. However, unlike in Cragiosia gen. n., the valvellae of Cragia are only weakly articulated with the phallus making it removable from the phallocrypt. Additionally, the male genital capsule of Cragiosia gen. n. differs from Crocosia in the shorter, more or less rectangular and evenly weakly sclerotised juxta (in Crocosia , it is trapezoidal with a more heavily sclerotised dorsal section having a medial notch), the presence of the intersaccular bridge (similar to Cragia while in Crocosia , the sacculi are separated by the diaphragm), the longer and broader tendon, and the editum lacking the ampulla. The phallus of the new genus lacks the long plate-like carina and has an evenly sclerotised and smooth body with a dorsally oblique distal opening whereas in Crocosia , the phallus has a weakly sclerotised, rugose and expandable distal section with an opening axis perpendicular to the body axis. The vesica of Cragiosia gen. n. is sack-like with several short diverticula and a vesica ejaculatorius originating proximally (similar to Cragia ) whereas in Crocosia it bears two large, horn-shaped cornuti and its vesica ejaculatorius originates distally.

In the female genitalia, Cragiosia gen. n. ( Figs 33–35 View Figures 30–35 ) differs clearly from Crocosia ( Figs 30, 31 View Figures 30–35 ) in the lack of the antevaginal plate, the evenly tubular ductus bursae (it is posteriorly dilated in Crocosia ), the elliptical and membranous corpus bursae lacking the diverticula (it is pyriform and posteriorly sclerotised in Crocosia ), and the vestigial appendix bursae situated medially whereas it is well-developed, conical, proximally sclerotised and situated postero-laterally in Crocosia .

Distribution. The genus is widespread in rainforests of the Guineo-Congolian Region reaching the western Congo Basin in the east.

Etymology. The new genus name is an aggregate of the genus-group names Cragia and Crocosia , and refers to the male genitalia structure of the new genus partly displaying characters of those genera. The gender is feminine

.

Molecular data. Species of the genus were recovered as monophyletic with intraspecific divergences in the range of 0–0.15% in C. mesosticta and 0% in C. smithi sp. n. The COI pairwise distance between C. mesosticta and C. smithi sp. n. was 2.35–2.51%.