Trassedia yanegai Mikó and Trietsch, 2018

Mikó, István, Trietsch, Carolyn, Kamp, Thomas van de, Masner, Lubomír, Ulmer, Jonah M., Yoder, Matthew Jon, Zuber, Marcus, Sandall, Emily L., Baumbach, Tilo & Deans, Andrew R., 2018, Revision of Trassedia (Hymenoptera: Ceraphronidae), an Evolutionary Relict With an Unusual Distribution, Insect Systematics and Diversity (AIFB) 2 (6), No. 4, pp. 1-29 : 23-24

Trassedia yanegai Mikó and Trietsch sp. nov.

(Zoobank LSID: urn:lsid:zoobank.org:act:53D5E575-4ED3-4146-A7F2-19ECF032846E )

Diagnosis

Trassedia yanegai shares the short setae on the dorsal region of the cranium (shorter than the diameter of the median ocellus; Fig. 3C and D ), the reduced anterior ocellar fovea that does not extend to the antennal scrobe ( Fig. 3C and D ), the punctate ocular impression along the inner orbit (io: Fig. 3C and D ) and a wide Waterston’s evaporatorium that reaches the lateral 13 of the tergite (wop: Fig. 4A and B ) with T. luapi and T. australiensis . Trassedia yanegai differs from these species in the lack of the notaulus, the lack of scutes on the vertex, the anteriorly gradually widening preoccipital sulcus (pof: Fig. 3C ), the foveolate sternaulus (ster: Fig. 5C ) and the large eyes (HW/IOS = 3.7, Fig. 3C ). The female pedicel and F1 are brown and F2–F4 are whitish in T. yanegai , while the female pedicel and F1–F3 are yellow and F4–F9 are dark brown in T. luapi .

Description

Body length: 3.95 mm. Color hue pattern female: cranium, mesosomablack, F5–F9 black, F2–F4 white, scape, legs, pedicel, F1 ochre. Color intensity pattern female: pedicel, F1, fore leg, mesocoxa darker than rest of middle leg, hind leg, scape. Structure of scutes on head and mesosoma: scute surface on head and mesosoma flat, scutes indistinct. Head: HW:HH = 1.1. HW/IOS Female: 3.8. Maximum eye diameter versus minimum eye diameter: 1.2. Interommatidial seta length: interommatidial seta length less than facet diameter. Occipital carina medially: continuous medially. Seta length on dorsal region of cranium versus diameter of median ocellus: shorter. Scutes on vertex count: absent. Preoccipital furrow anterior extension: adjacent anteriorly to the posterior margin of the median ocellus. Preoccipital furrow anterior region versus posterior region sculpture: posterior region crenulate, anterior region smooth or finely reticulate. Preoccipital furrow anterior region width versus posterior region width: wider anteriorly than posteriorly. Female OOL: POL: LOL: 0.1:0.5:1.0. Preocellar pit count: absent. Carina delimiting antennal scrobe count: absent. Transverse striation on upper face count: present. Anterior ocellar fovea shape: fovea not extended ventrally into facial sulcus. Supraclypeal depression count: present. Ocular impression sculpture: punctate (fovea of ocellar impression are well separated from each other). Antenna: Female scape length versus pedicel length: 2.4. Female F1 length versus pedicel length: 1.1. Female ninth flagellomere length: F9 less than F7+F8. Mesosoma: Mesosoma shape: not compressed laterally, as wide as high or wider than high. Pronope count: absent. Anterior slope of mesonotum shape: Anterior slope of mesonotum at obtuse angle to dorsal surface of mesonotum in lateral view. Antero-admedian line count: present. Notaulus count: absent. Notaulus anterior origin versus anterolateral angle of mesoscutum (ball-and-socket articulation between pronotum and mesoscutum): Notaulus arises medially of anterolateral angle of the mesoscutum. Scutes on posterior region of mesoscutum and dorsal region of mesoscutellum count: present. Epicnemial carina count: complete. Sternaulus count: present. Sternaulus sculpture: scalloped. Anterior metapleural carina count: present. Carina limiting posteriorly antecosta count: present. Lateral propodeal carina count: present. Wings: Stigmal vein length versus pterostigma marginal length: stigmal vein longer than the pterostigma marginal length.

Etymology

The species epithet refers to Douglas Yanega (Senior Museum Scientist of the Entomology Research Museum, University of California, Riverside), who drew our attention to the holotype of the new species.

Figures

Fig. 3. Brightfield images of Trassedia species. (A) Female antenna of Trassedia brasiliensis Masner and Mikó sp. nov. (OSUC 372988). (B) Male antenna of Trassedia nigrorufus Mikó and Masner sp. nov. (NCSU 53672). (C) Head of Trassedia yanegai Mikó and Trietsch sp. nov., anterior view (UCRCENT 392055). (D) Head of Trassedia luapi Cancemi 1996, anterior view (CASENT 2044510). (E) Head and mesosoma of Trassedia yanegai Mikó andTrietsch sp. nov., dorsal view (UCRC_ENT 392055). (F) Head and mesosoma of Trassedia luapi Cancemi 1996, dorsal view (CASENT 2002185) (aal = antero-admedian line, io = inner orbit, not = notaulus, pof = preocellar furrow, pro = pronope, ver = vertex).

Fig. 4. Brightfield images of Trassedia species. (A, B) Metasoma of Trassedia yanegai Mikó andTrietsch sp. nov. showing Waterston’s evaporatoria, dorsal view (UCRCENT 392055). (C) Head of Trassedia brasiliensis Masner and Mikó sp. nov., anterolateral view (OSUC 372988). (D) Head and mesosoma of Trassedia angustioculus Mikó and Masner sp. nov., anterolateral view (PSUC_FEM 17569). (E) Head and mesosoma of Trassedia angustioculus Mikó and Masner sp. nov., lateral view (PSUC_FEM 17569).(F) Head and mesosoma of Trassedia guianensis Mikó and Masner sp.nov., dorsal view (PSUC_FEM 96179) (aal = anteroadmedian line, ala = anterolateral edge of mesoscutum, io = inner orbit, not = notaulus, pcs = anterior ocellar fovea, pof = preoccipital furrow, sc = antennal scrobe, wop = Waterston’s evaporatorium).

Fig. 5. Brightfield images of Trassedia species. (A, B) Female metasoma and Waterston’s evaporatoria of Trassedia brasiliensis Masner and Mikó sp.nov. dorsal view (OSUC 372988). (C) Female head and mesosoma of Trassedia yanegai Mikó andTrietsch sp. nov., lateral view (UCRCENT 392055). (D) Female antenna of Trassedia luapi Cancemi 1996 (NCSU 71196) (ster = sternaulus, wop = Waterston’s evaporatorium).