Abstract
Two Japanese species, Ceratrimeria takaoensis (Kinoshita, 1916) and C. yasumatsui (Uchida, 1940), were redescribed based on fresh material, including that from the type localities and using modern morphological criteria. The main diagnostic characters of the genus Ceratrimeria are also discussed. In addition, nucleotide sequences of the mitochondrial cytochrome c oxidase subunit 1 and 16S ribosomal RNA genes of specimens obtained from the type localities of both congeners are analyzed allowing for their species statuses to be confirmed. Barcoded specimens are deposited in the National Museum of Nature and Science, Tsukuba, Japan and the DNA sequence data are available in the International Nucleotide Sequence Databases.
Highlights
The genus Ceratrimeria Bӧrner, 1906 presently comprises 11 species and is widely distributed in the tropics and subtropics of the Old World, ranging from Japan to New Zealand (Bellinger et al, 1996–2021)
Three specimens of both C. takaoensis and C. yasumatsui from the respective type localities and three specimens of C. takaoensis from a non-type locality were subjected to molecular analysis
To study a specimen both morphologically and molecularly, DNA was extracted as described in Aoyama et al (2015), with complete specimens being boiled in buffer
Summary
The genus Ceratrimeria Bӧrner, 1906 presently comprises 11 species and is widely distributed in the tropics and subtropics of the Old World, ranging from Japan to New Zealand (Bellinger et al, 1996–2021). It was established by Carl Bӧrner for Schӧttella maxima Schӧtt, 1901, known from New Guinea. According to the present concept of the genus, it includes species with the characteristics of the genus Pseudachorutes Tullberg, 1871, which have an expanded and flattened body (possessing pronounced paratergites du 3 type) Such a diagnosis proposed by Massoud (1967) seriously restricts the scope of the genus. Salmon (1942, 1944) listed 11 Ceratrimeria species for New Zealand, only three of them are still treated as its representatives (Bellinger et al, 1996–2021)
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