Setoppia izinyosa, Hugo-Coetzee, 2017

Hugo-Coetzee, Elizabeth A., 2017, New Oppiidae (Acari: Oribatida) from Vernon Crookes Nature Reserve, South Africa, Zootaxa 4311 (2), pp. 211-232 : 217-220

Setoppia izinyosa sp. nov.

( Figs 4 , 5 )

Diagnosis. Adult: body size 690–792 × 454–523; rostrum with incision and lateral tooth, medially rounded; two pairs of tubercles in interbothridial region and one tubercle posterior to bothridium; interlamellar seta of medium length; notogastral seta lm far antero-medially to la; adanal seta ad 3 level with anterior border of anal plate.

Description. Measurements. Length: females (n = 4) mean 760 (range 730–781), males (n = 6) 720 (690–753). width: females 495 (482–508), males 471 (454–497). Holotype (female): length 792, width 523.

Integument ( Fig. 4 A, C). Body surface smooth; exobothridial region to pedotectum I granulate and tuberculate.

Prodorsum ( Fig. 4 A, C). Rostral apex with incision on both sides, medially rounded, apex with cerotegumental extension; lateral to incision a small tooth present; rostral seta (86–108) located dorso-laterally, weakly ciliate, lamellar (87–111), interlamellar (54–70), exobothridial (34–45) setae thin, weakly ciliate; lamellar seta closer to interlamellar than to rostral seta; muscle sigillae in interbothridial region could not be observed, a few sigillae present anterior to bothridium; ornamental line medially to interlamellar seta; a pair of tubercles posterior to interlamellar seta, one directed posteriorly and the other anteriorly; tubercle posterior to bothridium present; bothridial seta (181–238) long, setiform, ciliate; pedotectum I typical for genus.

Notogaster ( Fig. 4 A–C). Round in dorsal view, high in lateral view; ten pairs of notogastral setae, seta c 2 minute, setae lm, la, lp, h 2 thick, long, ciliate, other setae short, smooth, setae p 2, p 3 very thin, difficult to observe; lm, la, lp (118–156)> h 2 (88–121)> h 3 (54–82)> p 1 (52–67)> h 1 (40–56)> p 2, p 3 (21–35)> c 2 (1–3); seta lm far antero-medially to la, seta lp antero-medially to h 3; lyrifissures ia, im distinct (11–20), other lyrifissures not visible.

Gnathosoma and epimeral region ( Fig. 4 B, C). Setae a, m (35–49), h (46–60) ciliate; epimeral setae 1c (94– 124)> 3c (87–116)> 1b, 3b, 4a (60–93)> 4b (48–62)> 1a, 2a, 3a, 4c (40–54); 1a, 2a, 3a, 4b smooth, other setae weakly ciliate; discidium triangular distally.

Anogenital region ( Fig. 4 B, C). All setae thin, smooth, except aggenital seta ciliate; six pairs of genital (g 1, g 6: 18–30> g 2–5: 13–23), one pair of aggenital (53–79), two pairs of anal (36–46), three pairs of adanal setae (44–62), ad 3 at anterior level of anal plate, ad2 posterior to lyrifissure iad (13–19); iad curved.

Legs ( Fig. 5 A–D). Leg IV (703–790)> leg III (570–638)> leg I (493–555)> leg II (411–497); leg setation (see Table 1 for details): leg I: 1–5–2(1)–4(2)–20(2), leg II: 1–5–2(1)–4(1)–16(2), leg III: 2–3–1(1)–3(1)–15, leg IV: 1– 2–2–3(1)–12; all setae ciliated, except smooth setae l” on Ge I, II, (p), (u) on Ta I, (u) on Ta II–IV; setae (p) on Ta II–IV short, tooth-like; setae v” on Ti IV, pv”, a” on Ta IV penicillate.

Etymology. The species name ‘ izinyosa ’ is derived from Zulu (language mostly spoken in KwaZulu-Natal) for tooth, ‘izinyo’, referring to the tooth laterally on the rostrum.

Type material. The holotype and 10 paratypes were collected in Vernon Crookes Nature Reserve, KwaZulu- Natal (3017’S, 3035’E) by L. Lotz, 13.I.1992 from soil and leaves under shrubs. The holotype ( NMB 3682.20.1) and seven paratypes ( NMB 3682.20.2) are deposited in the Acarology collection of the National Museum, Bloemfontein, South Africa . Three paratypes ( SMNG, DNR 56550) are stored in Senckenberg Museum für Naturkunde, Görlitz, Germany .

Remarks. Setoppia izinyosa sp. nov. is most similar to S. antennata and S. verrucosa from South Africa in having incisions on the rostrum, two pairs of tubercles in the interbothridial region and medium length interlamellar setae.

The new species differs from all the South African species in the larger body size ( S. izinyosa sp. nov. 690–792 × 454–523; S. antennata 431–475 × 255–275; S. clavimera 336–380 × 192–212; S. fortis 662 × 412; S. karinae (newly recorded in South Africa) 470–551 × 265–298; S. quattuor 408–438 × 222–258; S. tuberosa 475–533 × 270–303; S. verrucosa 418–484 × 237–278), the form of the incision on the rostrum ( S. izinyosa sp. nov. incision on both sides, with an additional lateral tooth, medially rounded; S. antennata (after examining of paratype), S. clavimera , S. tuberosa , S. verrucosa rostrum tripartite, tooth medially; S. fortis , S. quattuor , S. karinae rounded); tubercle posterior to bothridium ( S. izinyosa sp. nov., S. clavimera , S. tuberosa present; S. antennata , S. fortis , S. quattuor , S. verrucosa absent), all these species have three or four pairs of long, strong notogastral setae of similar length (la, lm, lp, h 2), but in S. fortis six pairs are of similar length (c 2, la, lm, lp, h 2, h 3), all species have two or more pairs of tubercles in the interbothridial region, except in S. clavimera these tubercles are absent.

Figures

FIGURE 4. Setoppia izinyosa sp. nov. (legs removed) A. Dorsal view; B. ventral view; C. lateral view.

FIGURE 5. Setoppia izinyosa sp. nov. A. Leg I, left, antiaxial view; B. leg II, right, antiaxial view; C. leg III, right, antiaxial view; D. leg IV, right, antiaxial view.