Trassedia nigra Masner and Mikó, 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 : 21-22

Trassedia nigra Masner and Mikó sp. nov.

(Zoobank LSID: urn:lsid:zoobank.org:act:F0BA471B-5065-45CB-A43E-698C5CD6211A )

Diagnosis

Trassedia nigra shares the presence of convex scutes on the dorsal head and mesosoma with T. brasiliensis and differs from it in the structure of the preoccipital furrow (anterior region of the furrow crenulate and not wider than the posterior region in T. nigra ; furrow smooth and the anterior region wider than the posterior region in T. brasiliensis ), the smaller eyes (HW/IOS = 2.2–2.3 in T. nigra ; HW/ IOS = 2.7–3.1 in T. brasiliensis ), body coloration (head and mesosoma dark brown, metasoma uniformly reddish-brown in T. nigra ; head and mesosoma orange, metasoma orange except for the median and lateral regions of the metasomal tergites in T. brasiliensis ) and the length of the pedicel (F1 longer than the pedicel in T. nigra ; F1 as long as the pedicel in T. brasiliensis ). The anterior metapleural carina and the antero-admedian line are also present in T. nigra and absent in T. brasiliensis .

Description

Body length: 2.60–3.10 mm. Color hue pattern female: scape, pedicel, F1–F4, legs, metasoma ochre, head and mesosoma except MLC and tegula dark brown. Color intensity pattern female: pedicel and F1 darker than scape and F2–F4. Structure of scutes on head and mesosoma: Scute surface on head and mesosoma convex, scutes distinct. Head: HW:HH = 1.0–1.1. HW/IOS Female: 2.2–2.3. Maximum eye diameter versus minimum eye diameter: 1.2–1.3. 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: longer. Setal pit on vertex size: larger than diameter of scutes. Scutes on vertex count: present. Preoccipital furrow anterior extension: adjacent anteriorly to the posterior margin of the median ocellus. Preoccipital furrow anterior region versus posterior region sculpture: crenulate in its entire length. Preoccipital furrow anterior region width versus posterior region width: as wide anteriorly as posteriorly. Female OOL: POL: LOL:0.4–0.6:0.7– 0.8:1.0. Preocellar pit count: absent. Carina delimiting antennal scrobe count: absent.Transverse striation on upper face count:absent.Anterior ocellar fovea shape: fovea extended ventrally into facial sulcus, reaching dorsal margin of antennal scrobe. Supraclypeal depression count: present; absent. Ocular impression sculpture: scalloped (foveae composing ocellar impression adjacent, sometimes not separated from each other). Antenna: Female scape length versus pedicel length: 2.4–2.5. Female F1 length versus pedicel length: F1 as long as pedicel (1.0–1.1). Female ninth flagellomere length: F9 = F7 + F8. Mesosoma: Mesosoma shape: not compressed laterally, as wide as high or wider than high. Pronope count: present. 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: present. Notaulus anterior origin versus anterolateral angle of mesoscutum (ball-and-socket articulation between pronotum and mesoscutum): notaulus arises at anterolateral angle of the mesoscutum. Posterior end of notaulus versus posterior end of antero-admedian line location: antero-admedian line extends more posteriorly than notaulus. Scutes on posterior region of mesoscutum and dorsal region of mesoscutellum count: present. Epicnemial carina count: complete. Sternaulus count: absent. 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 shorter than the pterostigma marginal length. Metasoma: Waterston’s evaporatorium shape medially male: paired, left and right evaporatoria are not continuous medially.

Etymology

The species epithet refers to the body coloration of the new species.