Schistoneurus subimpressus, Jaschhof, 2024

Schistoneurus subimpressus sp. nov.

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Fig. 30 View Fig

Differential diagnosis

Morphology

The single male described here as S. subimpressus sp. nov. differs from S. paraimpressus sp. nov. in having shorter flagellomeral necks (the neck-to-node ratio in the fourth flagellomere is 1.5 in S. subimpressus ( Fig. 30C View Fig ) versus 2.0 in S. paraimpressus ( Fig. 29C View Fig )) and in the construction of the gonostylus, of which the particulars are as follows. The gonostylus of S. subimpressus ( Fig. 30B View Fig ) is more compact; the thick black spines cover a markedly smaller area apically and apicomedially; the inside is less sharply separated from the outside (note the sharp longitudinal edge with black spines in S. paraimpressus , Fig. 29B View Fig ); and the ventral protrusion bears not just ordinary setae but a small cluster of black spines. The two species might also differ in body length ( 1.7 mm in S. subimpressus versus 2.2 mm in S. paraimpressus ), but this difference, derived from a small specimen sample, should be taken with caution considering the size variation described for S. impressus (1.7‒2.0 mm, Jaschhof & Jaschhof 2013). Larvae and females of the new species are unknown.

DNA barcode

The CO1 sequence (653bp) of the holotype specimen is available in BIN BOLD:AEO6709. Search on BOLDʼs BIN Database retrieved no further result for this BIN (accessed 27 Aug. 2023).

Etymology

The name ‒ the Latin prefix ‘ sub -’ means, in a broad sense, ‘beside’ ‒ is an allusion to the morphological similarity of this species to S. impressus .

Type material

Holotype

GERMANY • ♂; Bavaria, Lower Franconia, Rimpar ; 49°87′32″ N, 9°93′24″ E; elev. 272 m; 12 Jul. 2019; LandKlif and J. Müller leg.; Malaise trap; BOLD GBDTA10171-21 ; ZSM-DIP-42306-A06 .

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