Scientiae biologicae

The following new species are described: Baeoceroxidium inexspectatum sp. nov., Scaphicoma patens sp. nov., Scaphisoma bryanti sp. nov., S. drescheri sp. nov., S. multispinosum sp. nov., S. neglectoides sp. nov., S. planatoides sp. nov., S. posticum sp. nov., Scaphobaeocera basalis sp. nov., S. larga sp. nov., S. montisgedei sp. nov., S. spinigeroides sp. nov., S. truncata sp. nov., Scaphoxium corporaali sp. nov., S. dentatum sp. nov., and Xotidium reductum sp. nov. Scaphisoma flavapex Achard is fixed by lectotype designation and redescribed. The male genital characters of Scaphicoma ophthalmica (Achard) are illustrated for the first time. Baeocera incisa (Löbl), B. sarawakensis Löbl, Scaphisoma caudatum Löbl, S. chujoi Löbl and S. malaccanum (Pic) are reported from Java for the first time. Keys to Javanese species of Baeocera Erichson, Scaphicoma Motschulsky, Scaphisoma Leach and Scaphobaeocera Csiki, and a check list of Javanese Scaphidiinae are provided.

A new species of Baeocera is described from Uttarakhand, Chamba District. It is notable by its unique aedeagal characters. The external characters provide also features clearly separating the species from all Indian and Himalayan congeners.

A new species of Scaphidium Olivier, 1790 found in the mountains of southeastern Papua is described. It is similar to S. coerulans Löbl, 1978 and S. viride Löbl, 1978, notably by its unicolor body with a metallic-like shine.

The paper presents unknown ultrastructure of aedeagus and spermatheca of Chaetocnema conducta (Motschulsky), 1838, studied and figured under both stereo microscope and Scanning Electron Microscope (SEM). This is the type species of the subgenus Pseudochaetocnema Özdikmen, 2021 and one of two species of the subgenus occurring in Türkiye. Aedeagi and spermathecae so far have been studied on the basis of only stereo microscopic studies within the genus Chaetocnema Stephens, 1831. Until now, there is only one ultrastructural study with SEM on male and female genitalia of Chaetocnema species, therefore, the present study is the second in existence. In accordance with this, this study primarily aims to reveal and obtain new diagnostic characters with ultrastructural and detailed investigations of aedeagus and spermatheca of the species Chaetocnema conducta. As known, spermathecae in the genus Chaetocnema, like in most genera of the tribe Alticini, are partially uniform and do not offer good diagnostic characters at the species level. Contrary to the partial homogeneity of spermathecae, studies on aedeagi suggested quite large diversity of aedeagal structure. While the results from the present study basically support these opinions, the female spermatheca is found less significant but aedeagus is found important for diagnosis at the species level. In addition, new diagnostic characters for both the aedeagus and spermatheca have been revealed by investigations of ultrastructural morphologies using SEM especially.