Rohrthrips multihamuli Ulitzka 2022, sp. n.
Creators: name: Ulitzka, Manfred R.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Thysanoptera
Rohrthripidae
Rohrthrips
Rohrthrips multihamuli

description: Rohrthrips multihamuli sp. n.
(Figs 15, 27, 38)
Female. Abdomen slightly contracted; head bent upwards, its left side at base slightly dented; body partially covered by a reflective layer that gives an excellent impression of the sculptured structure; tube and parts of the wings difficult to assess due to cracks and bubbles; fore wings spread, hind wings overlapping body, left fore leg folded under body.
Colour uniformly dark brown including antennae and legs; all major setae dark as well as wing veins and fringes; wings very weakly shaded greyish brown, largely translucent.
Head (Fig. 15) as long as wide; recessed behind the eyes; sculptured with fine reticulations. Cheeks nearly straight, diverging backwards and tapering sharply after a lateral ridge towards base; furnished with tubercles bearing short stout setae. Ocellar setae not assessable, two points of attachment visible near base of each antenna. Postocular setae far behind compound eyes; pointed, long and stout. Eyes large, laterally occupying about half of the head length; not prolonged ventrally. Ocelli arranged on a distinct ocellar hump, with fore ocellus protruding towards front and hind ocelli close to compound eyes. Antennae nine-segmented (Figs 15, 38); segment I long, broadened at base, inverse funnel-shaped; II inversely conical, with a campaniform sensillum close to apex; III and IV basally with a long pedicle, distally cylindrical; V basally with a long pedicle, then inversely conical and ventrally with a pointed projection bearing a seta at apex; VI–VIII basally with a short pedicle, then inverse conical and slightly tapering towards apex, each with a short projection ventrally (somewhat similar to some species of extant Anactinothrips Bagnall (see Retana-Salazar 2009); IX conical, broadly attached to VIII. All antennal segments bearing many setae, particularly III and IV. Sense cones tiny, difficult to see and to distinguish from setae; their number not determinable. Mouth cone short and rounded. Maxillary stylets not assessable. Pronotum trapezoidal, wider than long; sculptured finely reticulate; with notopleural suture complete. Pronotal anteromarginal and posteromarginal setae vestigial; anteroangular setae recurved and pointed; mediolateral, posteroangular and epimeral setae distinctly long, hairlike and finely pointed. Mesonotum and metanotum sculptured reticulate; metanotum with a pair of long median setae far behind front margin of plate. Fore wings becoming progressively larger in distal half; anterior vein reaching costa at about three quarters of the wings’ length, distally expanded to a brown elongated mark, furnished with a row of 12 setae and distally with three terminal setae close to costa; second vein not developed; membrane anteriorly at base clearly with some sparse microtrichia (Fig. 27), distal part of the wing membrane smooth. Fringe cilia straight; slightly enlarged at base but embedded into the wing membrane, not on sockets. Duplicated cilia present around apical margin of wing; running parallel to normal wing fringes; on sockets or at least not deeply retracted into wing membrane. Hind wings at base clearly with some sparse microtrichia (Fig. 27), distal part of the wing membrane smooth and without any veins. Wing coupling system hamulo-frenate; hamulate component consisting of a row of six (right) and seven (left) hamuli at anterior margin close to base of hind wing (Fig. 27). Fore legs (Fig. 15) with femora enlarged; tibiae dorsally with a long hair-like seta; fore tarsi with a strong tooth and with hamus. Mid legs slender; tibiae each with a long dorsal seta and terminally with two strong spines; mid and hind tarsi twosegmented. Abdominal tergites without wing-retaining setae, but with fine long and recurved dorsal and lateral setae; sculpture of tergites reticulate (assessable only in some parts). Abdomen with tergite I (pelta) broad, shape of fore margin not assessable (covered by hind margin of metanotum); tergite II with a dorsolateral suture slanting laterally inwards; VIII with sternal gynosternites clearly visible. Segment IX conical, tergal setae s1 (broken off, preserved near tube) stouter than s2 and s3; s2 longest, but much shorter than tube. Abdominal segment X tubular, long and slender, with a terminal crown of anal setae, which are shorter than the tube.
Measurements. Female (in microns): Body, length 2800. Head, length 274; largest width 274. Eyes, length 132; width 63. Hind ocelli, diameter 25; distance between the hind ocelli 50. Postocular setae about 60 (difficult to measure). Pronotum, length 340; width 447; anteroangular setae 50, mediolateral setae 208, posteroangular setae 206 and epimeral setae 164. Pterothorax, largest width 539. Abdomen, length 1760; largest width 566 (segment III); segment X (tube), length 460; basal width 78. Setae on tergite IX, s1 186; s2 380; s3 196. Antennae, length 744; length (largest width) of segment I 68 (31), II 62 (28), III 133 (43), IV 133 (37), V 114* (28), VI 93* (22), VII 65* (20), VIII 57* (12), IX 28 (6) [all measurements taken on right antenna; segments indicated with * have been measured from segment base to tip of the distal projections]. Fore wings, length 1352; largest width 343.
Material studied. Holotype female MU-Fos-137/1 (Figs 15, 27, 38); inclusion in Burmese amber from Hukawng Valley, Kachin State, Myanmar. The holotype was donated by Patrick Müller and is deposited in the author’s collection.
Syninclusions. A mite (attached?) dorsally to the abdomen of the thrips; remnants of an insect, a plant trichome, many air bubbles around the thrips inclusion.
Etymology. The species epithet multihamuli refers to the wing coupling system comprising a remarkable number of hamuli (Fig. 27).
description: Published as part of Ulitzka, Manfred R., 2022, New genera and species of Rohrthripidae (Thysanoptera: Tubulifera) from Burmese Cretaceous amber, pp. 1-36 in Zootaxa 5162 (1) on pages 13-14, DOI: 10.11646/zootaxa.5162.1.1, http://zenodo.org/record/6796605