Ceratopera, DEN HARTOG, 1964

CERATOPERA DEN HARTOG, 1964 View in CoL

Mesostoma Levinsen, 1879: 175 View in CoL .

Proxenetes von Graff, 1882: 277 View in CoL ; Vaillant, 1890: 642; Pereyaslawzewa, 1893: 255–259; von Graff, 1905: 112; von Graff, 1908: 2531–2532; von Graff, 1913: 181; Meixner, 1938: 11, fig. 10A; Luther, 1943: 61, 63; Luther, 1948: 63–64; Ax, 1953: 238.

Ceratopera Den Hartog, 1964: 377–382 View in CoL , 399, fig. 2; Ax, 1971: 146–150, fig. 1.

Messoplana Den Hartog, 1966a: 147 View in CoL ; Den Hartog, 1964: 377–382, fig. 2; Ax, 1971: 146–150, 173, fig. 1.

New diagnosis: Trigonostominae with afferent system differentiated into a bursa and a sclerotized bursal appendage. Bursa usually with slender bursal canal. Bursal appendage very variable, consisting of a funnel-shaped tube, two slender tubes or a combination of both, with or without a sclerotized ring, sometimes partly protruding into the bursa. Sclerotized parts of the male copulatory organ consisting of a proximally curved stylet proper connected to an accessory mantle at its base. Mantle differentiated into one or several pieces, either plates, tubes, or a combination of both. Accessory mantle either partly sheathing the stylet proper or completely separate from it.

Type species: Ceratopera gracilis (von Graff, 1882) Den Hartog, 1964 .

Remarks: The genus Messoplana is suppressed based on the results of our phylogenetic analysis and the ambiguity of the morphological characters differentiating the representatives of Messoplana and Ceratopera sensu Den Hartog (see discussion C. complicata sp. nov.). All species of Messoplana are transferred to Ceratopera , which now has 26 valid species. A new diagnosis for Ceratopera is provided.