Indotritia, Jacot, 1929

Niedbała, Wojciech, 2017, Ptyctimous mites (Acari, Oribatida) of Tanzania, Acarologia 57 (4), pp. 957-1072 : 973

Indotritia (lndotritia) tropica Starý, 1993

( Fig. 9 A-F)

Indotritia tropica Starý, 1993 .

Diagnosis — Measurements of one specimen from sample TAN-028: prodorsum: length 444, height 162, width 358, setae: ss 202, in 139, le 134, ro 101, ex 33; notogaster: length 828, height 687, width 677, setae: c 1 and ps 3 119, c 1 /c 1 -d 1 =0.7, h 1 and ps 1 190; genitoaggenital plate 252×136; anal and adanal plates 404×101. Measurements of one small specimen from sample TAN-019: prodorsum: length 293, height 111; notogaster: length 489, height 409, setae c 1 106, c 3 207, c 1 /c 1 -d 1 =0.7.

Specimens measured by Starý (1993) are rather similar to my smaller specimens.

Rather large-sized species; colour brown. Prodorsum with fine striation in anterior part; two lateral carinae present, superior carinae slightly shorter than inferior; sensilli long, setiform, smooth similar to lamellar setae; interlamellar and lamellar setae long, erect, spiniform, covered with small cilia; exobothridial setae short; ss> in> le = ro> ex. Notogaster with stout, rigid, of medium length setae, similar to interlamellar setae (c 1 /c 1 -d 1 =0.7), only setae c 3 and ps 3 more fine; setae c 1 and c 2 remote from anterior margin, setae c 3 situated near anterior border; setae ps 3 situated posteriorly of an 1 and ad 1 setae. Ventral region; setae h of mentum only slightly longer than distance between them; genitoaggenital plate with 9 setae, 5 setae in progenital position; aggenital setae ag 2 longer (43) than setae ag 1 (23); anal plates with 2 and adanal plates also with 2 setae, setae ad 2 long, considerably longer than minutes other setae of anal and adanal plates, lyrifissures iad situated laterally and slightly posteriorly of ad 2 setae. Chaetome of legs without tarsi: I:1-3-4(2)-5(1), II: 1-4-4(1)-3(1), III: 3-2-3(1)-3(1), IV: 3-2-2(1)-3(1); all tarsi heterotridactylous.

Remark — All (10) specimens from sample TAN- 028 has short setae c 3; 2 specimens from TAN-019 short setae, 1 specimen long setae; 2 specimens from TAN-018 has short setae, 6 specimens long setae.

I too hastily synonymized Indotritia tropica Starý, 1993 with Indotritia krakatauensis (Sellnick, 1923) on the basis of the presence of 2 anal and 2 adanal setae ( Niedbała 1998). Meanwhile I. krakatauensis has small interlamellar setae usually bent posteriorly, shorter setae of notogaster and setae ps 3 situated anteriorly of an 1 and ad 1 setae.

Three similar species has setae h of mentum considerably longer than distance between them; I. bellingeri Niedbała et Schatz, 1996 from Neotropical Region and I. eksteeni Niedbała, 2006 from South Africa ( Niedbała 2006a) has setae ps 3 situated anteriorly of an 1 and ad 1 setae and setae ad 2 similar in length as other anal and adanal setae; I. paraconsimilis Niedbała, 1912 from Ethiopia have setae ad 2 minute.

It is interesting that south American species I. bellingeri is found in Zambia ( Ermilov and Niedbała 2013).

Localities in Tanzania: Tanga Region: Starý,

1993, Niedbała 1998; Uluguru and Nguru Mts.

Distribution — Afrotropical species known only from Tanzania.

Figures

FIGURE 9: Indotritia (lndotritia) tropica Starý, 1993 (specimen from sample TAN-028, only D specimen from sample TAN-019): A – prodorsum, dorsal view; B – prodorsum, lateral view; C – opisthosoma, lateral view; D – anterior part of notogaster, lateral view; E – mentum of subcapitulum; F – right side of ventral region; G – trochanter and femur of leg I.