Divellepidosis quadridens (Spungis, 1981)

Jaschhof, Mathias, 2024, New taxa and new records of Winnertziinae and Porricondylinae (Diptera: Cecidomyiidae) from Germany, European Journal of Taxonomy 953, pp. 1-134 : 76-78

Divellepidosis quadridens (Spungis, 1981)

Fig. 19

Morphological identification

Jaschhof & Jaschhof (2013). See also the next paragraph.

DNA barcode

CO1 sequences (652‒659bp) were obtained of two specimens detailed below and allocated to two BINs, BOLD:AEP5411 (ZSM-DIP-42303-G10) and BOLD:AEP5413 (ZSM-DIP-42303-E02). The fact that the two genetic clusters, labeled here A and B, are supported by morphological differences, suggests the presence of two discrete species. In A, the tegmen is strictly parallel-sided (↓ 1, Fig. 19A ) and sharply pointed apically (↓ 2); in B, it is slightly constricted near the midlength (↓ 1, Fig. 19B ) and narrowly rounded apically (↓ 2). Also, the gonocoxal ventral emargination of A might be broader and U- rather than V-shaped compared with B (↓ 3, Fig. 19A‒B ), and the undulating sclerotized rim at the inside of the gonocoxal wall is entirely sharply demarcated in A, while it is seemingly interrupted in B (↓ 4, Fig. 19A‒B ). Both characters, outline of the emargination and appearance of the rim, might be interdependent. Since possible effects of individual variation and preparation artefacts cannot be assessed in the absence of further specimens for study, I refrain here from naming the potential sibling species. Also, it remains to be settled through study of the holotype which of the clusters is the genuine D. quadridens . Search on BOLD’s BIN Database retrieved no further results for these BINs (accessed 27 Aug. 2023).

Material examined

GERMANY ‒ Bavaria • 1 ♂; Weilheim, Pähl , Hartschimmelhof ; 47°93′99″ N, 11°18′30″ E; 20 Jun.‒12 Jul. 2020; D. Doczkal and K. Grabow leg.; Malaise trap; fen; ZSM-DIP-42303-E01 • 1 ♂; same data as for preceding; BOLD GBDTA9930-21 ; ZSM-DIP-42303-E02 • 1 ♂; same data as for preceding but 47°94′23″ N, 11°18′30″ E; BOLD GBDTA9962 ; ZSM-DIP-42303-G10 .

Distribution

Germany (new record); Sweden, Latvia ( Gagné & Jaschhof 2021).

Figures

Fig. 19. Divellepidosis quadridens (Spungis, 1981). A. Terminalia, ventral view, genetic cluster A (ZSM-DIP-42303-G10). B. Terminalia, ventral view, genetic cluster B (ZSM-DIP-42303-E02). Scale lines: 0.05 mm. The numbered arrows indicate diagnostic characters (see text).