Indotritia (Afrotritia) nuda Mahunka, 1988

Niedbała, Wojciech, 2017, Ptyctimous mites (Acari, Oribatida) of Tanzania, Acarologia 57 (4), pp. 957-1072 : 975-979

Indotritia (Afrotritia) nuda Mahunka, 1988

( Fig. 11 A-G, 12A-F)

Indotritia nuda Mahunka, 1988 .

Indotritia usumbarensis Starý, 1993 syn. by Niedbała 1998.

Diagnosis — Measurements of paratype: prodorsum: length 444, height 167, width 394, setae: ss 152, in 30, le 56, ro 20; notogaster: length 949, height 596, width 606, setae: c 1 25, c 1 /c 1 -d 1 =0.2, c 3 56, ps 1 30, ps 2 51, ps 3 48; genitoaggenital plate 252×131; anoadanal plate 475×111. Measurements of specimen from TAN-016: prodorsum: length 465, width 358, height 146, setae: ss 121, in 13, le 28, ro 6; notogaster: length 949, width 606, height 576, setae: c 1 104, c 1 /c 1 - d 1 =0.5, h 1 88, ps 1 76; genitoaggenital plate 177×101, anoadanal plate 444×91.

Large-sized species; colour brown. Prodorsum with two closely running carinae; sensilli long, smooth, gradually tapering; all other setae minute; rostral setae do not reach the end of rostrum; ss> le> in> ro; exobothridial setae vestigial. Notogastral setae small and smooth, setae c 1 remote from anterior margin more than setae c 2 and c 3. Ventral region; setae h of mentum considerably longer than the distance between them, 9 pairs of genital and 2 or 3 pairs of aggenital setae present, setae ag 2 slightly longer than setae ag 1. Cleft trv small, as long as distance between setae g 8 - g 9; 2 pairs of anal and 2 pairs of adanal setae separated far from each other; lyrifissures iad situated antiaxially of ad 2 setae. Palps five segmented with formula: 0-2-0-2- 9(1); all tarsi heterotridactylous. Chaetome of legs without tarsi: I: 1-3-5(2)-5(1), II: 1-4-4(1)-3(1), III: 3- 3-3(1)-3(1), IV: 3-2-2(1)-3(1); all tarsi heterotridactylous.

Remark — Mahunka (1988) drawing his new species did not observe that the anoadanal suture is incomplete, as demonstrated in the present paratype ( Fig. 10 A-F). I asked Dr. Starý to check anoadanal plates in Indotritia usumbarensis and having examined the holotype he has confirmed that the anoadanal suture was also incomplete ( Fig. 11G ). The specimens from TAN-016 have longer notogastral setae ( Fig. 12C ) and 2 specimens 3 pairs of aggenital setae.

Localities in Tanzania: Tanga Region: Mahunka

1988, Niedbała 1998, Starý 1993; Uluguru and Nguru Mts.

Distribution — Afrotropical species known only from Tanzania.

Figures

FIGURE 11: Indotritia (Afrotritia) nuda Mahunka, 1988. A-F (paratype). G. holotype of Indotritia usumbarensis Starý, 1993: A – prodorsum, dorsal view; B – prodorsum, lateral view; C – opisthosoma, lateral view; D – mentum of subcapitulum; E – left side of ventral region; F – femur of leg I; G – right side of ventral region.

FIGURE 10: lndotritia (Afrotritia) compacta Mahunka, 1988 (paratype): A – prodorsum, dorsal view; B – prodorsum, lateral view; C – opisthosoma, lateral view; D – right side of ventral region.

FIGURE 12: Indotritia (Afrotritia) nuda Mahunka, 1988 (specimen from TAN-016): A – prodorsum, dorsal view; B – prodorsum, lateral view; C – opisthosoma, lateral view; D – mentum of subcapitulum; E – left side of ventral region; F – femur of leg I.