Nossidium harrietae, Darby, 2020

Darby, Michael, 2020, Eight new species of Ptenidiini and Discheramocephalini (Coleoptera: Ptiliidae) from Ecuador, European Journal of Taxonomy 599, pp. 1-19 : 3-4

Nossidium harrietae sp. nov.

urn:lsid:zoobank.org:act:808DC202-D54F-4596-A8C4-974DB2200DF5

Fig. 1 A–G

Etymology

Named after Harriet Oram, a close friend of the author’s family.

Material examined

Holotype

ECUADOR • ♂; Napo, Cosanga, Camp ; 2100 m a.s.l.; 7 Jun. 2017; sifting; J. McClarin leg.; QCAZM.

Paratypes

ECUADOR • 6 spec.; same data as for holotype; one mounted ventral side uppermost; BMNH, QCAZM • 3 spec.; same data as for holotype but 8 Jun. 2017; BMNH, QCAZM • 2 spec.; same data as for holotype but 6 Jun 2017; QCAZM • 1 spec.; same data as for holotype but 11 Jun. 2017; abdomen only; mounted as a slide; BMNH • 35 spec.; Napo, Cosanga, Camp , flotsam; 2100 m a.s.l.; 1 Jul. 2017; in alcohol; BMNH .

Description

SIZE. Habitus length 0.89 mm, globose species, ( Fig. 1A ).

COLOUR. Dark brown, shining; pubescence, antennae and legs dusky yellow. HEAD. Smooth, shining, with sparse pubescence, width across eyes 0.32 mm; antennomeres III–XI length 0.38 mm, the two basal segments forming a scape and IX–XI a loosely jointed club; mentum tapering posteriorly, with two long setae situated medially on lateral margins, anterior margin concave before sinuate corners, prementum with 5–6 setae ( Fig. 1E ); labrum setose.

PRONOTUM. Length 0.20 mm, width 0.58mm, widest basally, disc simple, pubescence confined to sides, hind corners posteriorly directed in dorsal view, lateral margins with narrow borders in lateral view.

ELYTRA. Length 0.67 mm, width 0.60 mm, widest at humeri, completely covering abdomen, shallowly foveolate, pubescent setae of same length as those on pronotum, with wide pubescent epipleura.

SCUTELLUM. Small, triangular.

PROSTERNUM. Very narrow in front of procoxae, which are adjacent and with short keel anteriorly reaching midpoint of coxal cavities; coxal cavities open behind.

MESOVENTRITE. Collar reticulate, narrow, with sharply defined anterior margin produced medially as a narrow extension to posterior margin, extended onto humeri without forming a humeral tooth; mesocoxae separated by a broad, flattened, reticulate, pubescent keel, which slopes sharply anteriorly as narrow ridge to posterior margin of collar ( Fig. 1G ), posterior margin sinuate before meeting lateral margin ( Fig. 1F ).

METAVENTRITE. Length 0.18 mm, width 0.49 mm, with sparse pubescence, anterior margin with broad raised border around mesocoxae, metepisternal sutures clearly marked, turning sharply posteriad before lateral margin, metacoxae separated by a bifurcate extension of metaventrite, which is not sharply pointed ( Fig. 1D ), coxal plates rounded before tapering to a point at lateral margin ( Fig. 1F ).

WINGS. Without clear medial restriction, fringed with setae.

MALE GENITALIA. Aedeagus with narrow parameres ( Fig. 1C ).

FEMALE GENITALIA. Spermatheca rounded ( Fig. 1B ).

Remarks

Nossidium harrietae sp. nov. shares with N. katyae Darby, 2015 and N. schuelkei Darby, 2016 a wide and flattened mesoventrite keel separating the mesocoxae, but is distinguished from the former by its more globular rounded form, disc of pronotum without pubescence and the sharp spines on the bifurcate metaventrite process, and from the latter by the much less densely punctured and pubescent dorsum.

Figures

Fig. 1. Nossidium harrietae sp. nov. A. Habitus. B. Spermatheca. C. Aedeagus. D. Bifurcate projection of the metaventrite between the metacoxae ×1480. E. Mentum and prementum ×900. F. Venter ×288. G. Mesoventrite keel ×855.