Gonothrombium Feider, 1950

Karakurt, İbrahim, Sevsay, Sevgi & Buğa, Evren, 2016, A review of Gonothrombium Feider, 1950 (Actinotrichida: Microtrombidiidae) with description of a new species from Turkey, Zootaxa 4154 (1), pp. 51-65 : 52

Genus Gonothrombium Feider, 1950

Type species Microtrombidium (Gonothrombium) bimaculatum Feider, 1950

Diagnosis. Adults. Body colour red when alive. Medial face of palp tibia with two ctenidia and radula. Distal ctenidium composed of stronger setae than proximal ctenidium. Lateral face of palp tibia with one basidont placed at base of palp tarsus. Palp tarsus bears 3–4 terminal solenidia and 1 lateral solenidion. Crista metopica well developed with anterior, posterior and accessory posterior processes. Anterior part of crista metopica long, extending to vertex which bears numerous long, setulose, nonsensillary setae (AM). Sensillary area bears two short, smooth sensillary setae; accessory process present and cylindrical or hammer-like. Dorsal opisthosomal (pDS) setae of one type, covered with numerous, short setulae and always based on thin, short peduncles that arise from small papillae. Stem of all pDS with fine setules (based on Gabryś (1999)).

Larvae. Palp femur and genu without seta. Palp tibia bears three setae which a long nude seta, a spine-like seta and a minute seta. Adoral setae short and smooth. Hypostomal setae (bs) spine-like. Dorsal idiosoma with a scutum and a scutellum. Whole surface of scutum longitudinally striated, punctate or transverse line up to AM bases of scutum and whole remaining part longitudinally striate and punctate, with three pairs of nonsensillary setae and one pair of sensillary setae. S setae with few barbs at middle of stem. Whole surface of scutellum longitudinally striated with multiple (about 8–18) setae. Remaining dorsal idiosoma bears numerous barbed setae. ƒCx formula: BB-B-B. Leg segmentation formula: 6-6-6 (femora of legs ventrally divided, with slight line of fusion evident). Stout, clublike solenidia on tarsus II. Tarsi I and II terminate in two claws with tip trifurcate; tarsi III terminate in two claws with tip trifurcate and a slender claw-like empodium. Tarsal claws formula: 2-2-3 (based on Southcott (1994)).