Ptyctimous mites (Acari, Oribatida) of Tanzania Author Niedbała, Wojciech text Acarologia 2017 2017-11-14 57 4 957 1072 http://dx.doi.org/10.24349/acarologia/20174217 journal article 10.24349/acarologia/20174217 2107-7207 5402635 21351710-FE9E-4E20-A29D-C480D3BA56FD Arpthiracarus marginatus ( Mahunka, 1984 ) ( Fig. 48 A-E) Hoplophthiracarus marginatus Mahunka, 1984 . Arpthiracarus marginatus : Niedbała 2001 . I examined once again the paratype in alcohol. Diagnosis — Measurements of paratype : prodorsum: length 404, width 308, height 151; notogaster: length 810, width 545, height 444. Large-sized species; colour brown, light; concavities only on borders of prodorsum and notogaster, ventral plates smooth. Prodorsum with median field trapezoidal, longer than lateral ones; anterior end of prodorsum convex in lateral view; lateral carinae distinct; posterior furrows well visible; sensilli relatively long, lanceolate end of head covered with small spines; interlamellar setae very long, strong, erect, covered with small spines in distal half; rostral setae long, thick, rough, directed inwards; lamellar setae spiniform; exobothridial setae minute; in > ro > ss > le > ex . Notogaster with long ( c 1 /c 1 -d 1 =1,4) setae, thick, rough, with conical distal end; setae c 3 near anterior margin, setae c 1 and c 2 remote from margin, setae h 3 and ps 4 the shortest, setae h 1 and ps 1 the longest; vestigial setae invisible; 4 pairs of lyrifissures: ia , im , ip , ips present. Ventral region; formula of genital setae: 6(4+2): 3; anal and adanal setae rough, setae ad 1 and ad 2 considerably longer than anal and ad 3 setae. Leg setation complete; setae d on femora I remote from distal end. FIGURE 47: Austrophthiracarus aokii (Mahunka, 1983) (paratype): A – prodorsum, dorsal view; B – prodorsum, lateral view; C – opisthosoma, lateral view; D – right genitoaggenital plate; E – right anoadanal plate; F – trochanter and femur of leg I. FIGURE 48: Arpthiracarus marginatus ( Mahunka,1984 ) (holotype): A – prodorsum, dorsal view; B – prodorsum, lateral view; C – opisthosoma, lateral view; D – paraxial side of left genitoaggenital plate; E – left anoadanal plate; F – trochanter and femur of leg I. Localities in Tanzania : Dodona Region: Mahunka 1984 , Niedbała 2001 ; the Uluguru and Nguru Mts. Distribution — Afrotropical species known only from Tanzania , probably endemic.