Chaoborus, : Alhonen & Haavisto, 1969

Salmela, Jukka, Härmä, Oskari & Taylor, Derek J., 2021, Chaoborus flavicans Meigen (Diptera, Chaoboridae) is a complex of lake and pond dwelling species: a revision, Zootaxa 4927 (2), pp. 151-196 : 181

Chaoborus sp.

Chaoborus crystallinus: Komyo 1954: 12 (redescription, adult female and male), paramere fig. 1.

Chaoborus cf. flavicans : in part. Dupuis et al. 2008 (molecular phylogeny).

Chaoborus flavicans : in part. An et al. 2012: (molecular phylogeny).

Chaoborus sp.: Zhang et al. 2019: (molecular phylogeny).

This taxon is treated here as a putative undescribed species of the C. flavicans complex. Komyo (1954) redescribed Japanese specimens as C. crystallinus and illustrated the male paramere.According to Komyo, this species lacks tergal bands and the paramere does not fit C. crystallinus , C. flavicans , C. albipes or C. posio sp. n. In recent molecular studies ( Dupuis et al. 2008; An et al. 2012; Zhang et al. 2019) a few specimens (four in total, see below) seem to form separate clusters or branches, which probably represent a distinct taxonomic species ( Fig. 15 ). This species may be the Chaoborus illustrated by Komyo, but conclusive evidence is still lacking. Further integrative studies are needed to clarify the status of this taxon which may be endemic to Japan. This taxon formed a unique BIN BOLD: AEA 6459 in BOLD, composed of the specimen MK281356 analysed by Zhang et al. (2019). The collecting data of the specimen is the following: Japan, Kyushu, Fukuoka-shi, Kashii, 2.10.2013, Shigetaka Nonaka leg. ( Zhang et al. 2019 appendix). Sequencing of the specimens studied by Dupuis et al. (2008) and An et al. (2012) did not cover the COI barcoding region and are not comparable in the present context. GenBank accession number DQ146274 ( Dupuis et al. 2008) was collected from Toyama prefecture, N36.81, E136.93, in 2004; JQ277993 and JQ277994 ( An et al. 2012) lack collection data, except “ Japan ”.

Figures

FIGURE 15. A maximum likelihood phylogram of the Chaoborus flavicans species complex based on the DNA barcoding region (COI) of mitochondrial DNA. The best fit substitution model of TVM+F+R4 was used. Support values exceeded 90 (transfer bootstrap support) except where asterisks are given. Clade sample sizes are provided. The light gray shading indicates the C. flavicans complex and the dark gray box indicates C. albipes (also a member of the C. flavicans complex). The tree was outgroup rooted using species of Monchlonyx. Triangles represent collapsed clades to save space.