Nematodes Berthold, 1827

Otto, Robert L., 2017, Eucnemid larvae of the Nearctic Region. Part VII: Description of the larvae of Nematodes penetrans (LeConte, 1852) (Coleoptera: Eucnemidae: Macraulacinae: Nematodini), with notes on its hypermetamorphic life cycle, Insecta Mundi 2017 (545), pp. 1-9 : 2

Genus Nematodes Berthold, 1827

Adult diagnosis. Characters of Nematodini , with mandibles short, ventral secondary tooth present, without expanded lateral surfaces; prothoracic tibiae with one apical spur; male prothoracic tarsomere I with basal sex combs; tarsomere IV originally bilobed; lateral sides of mesothoracic and metathoracic tibiae variable, either with setae and simple spines or with setae and transverse rows of spine combs; hypomeron usually without antennal grooves; prothoracic sternal peg high, either truncated or excavated; median lobe without dorsal basal struts, fused with lateral lobes, distinct, with narrowly and deeply bifurcate apex; bursa divided, simple; spermatheca sclerotized, divided and U-shaped.