Adstrictubothrips, Ulitzka, 2022

Ulitzka, Manfred R., 2022, New genera and species of Rohrthripidae (Thysanoptera: Tubulifera) from Burmese Cretaceous amber, Zootaxa 5162 (1), pp. 1-36 : 3

Adstrictubothrips gen. n.

Type species: Adstrictubothrips mirapterus gen. et sp. n.

Diagnosis. Abdominal segment X tubiform with a distinct constriction in the middle ( Fig. 1 ). Antennae nine-segmented. Fore wings ( Fig. 2 ) narrow, slightly bent forwards and broadened at base; first vein complete but bearing setae only in the basal two-thirds; second vein and cross-veins not developed; wing coupling hamulo-frenate. Fringe cilia distinctly thickened at base, but for the most part embedded into wing membrane, not on sockets; duplicated cilia present. Abdomen without sigmoidal wing retaining setae.

Adstrictubothrips shows modern tubuliferan character states in combination with plesiomorphic features like nine-segmented antennae and fore wings with a complete first vein. It therefore is allocated to Rohrthripidae . In contrast to most species of Rohrthrips the wing fringes in Adstrictubothrips are embedded for the main part into the wing membrane.A similar situation, however, has been also found in some species of Rohrthrips , eg R. patrickmuelleri or R. schizovenatus ( Ulitzka 2019) . Thus, this character state does not contradict the classification of the new genus within Rohrthripidae . Adstrictubothrips differs from Rohrthrips with regard to the narrow wings and the wing vein, which is furnished with setae only in the basal two-thirds of the wing length.

Etymology. The name of the new genus derives from the Latin words adstrictus, meaning “narrowed”, and tubus, meaning “tube”, as well as thrips, the usual term for a genus within Thysanoptera . The name refers to the constriction in the tube of the generic type specimen ( Fig. 1 ).

Figures

FIGURES 1–4. Rohrthripidae species. Adstrictubothrips mirapterus gen. et sp. n. 1–2: (1) holotype female dorsal view, indicated: constriction at the tube; (2) right wings, indicated: duplicated cilium on fore wing margin. Gemineurothrips microcephalus gen. et sp. n. syntype female (MU-Fos-145/1) 3–4: (3) dorsal view; (4) left antenna.