Africoribates subiasi, Ermilov & Sidorchuk & Rybalov, 2011

Ermilov, Sergey G., Sidorchuk, Ekaterina A. & Rybalov, Leonid B., 2011, New oribatid mites of the superfamily Ceratozetoidea (Acari: Oribatida) from Ethiopia, African Invertebrates 52 (2), pp. 311-311 : 333-338

Africoribates subiasi sp. n.

)LJV 7±9

Etymology: The species is named in honour of Prof. Luis Subías (Universidad Complutense de Madrid, Madrid, Spain), the distinguished acarologist, who has contributed VLJQL¿FDQWO\ WR WKH VWXG\ RI RULEDWLG PLWHV WKURXJKRXW WKH ZRUOG.

Diagnosis: The new species is distinguished by the following combination of character states: body size 531–564 × 348–381; body surface granulate; lamellae and dorsal parts of tutoria with longitudinal lines; lamellae and translamella broad; rostral and lamellar setae shorter than interlamellar setae; sensilli short, with oval, slightly barbed head; tutorium with broad cusp distally, bearing two small teeth; areae porosae Al present, slightly visible; notogastral setae setiform, barbed; four pairs of round areae porosae present; oval postanal area porosa (PA) present; leg setae l" on tarsi I, tibiae I, II and IV, genua I thick, with strongly conical teeth.

Description:

Measurements. Body length 531 (holotype, female), 547–564 (paratypes: two female, one male); body width 381 (holotype, female), 348–381 (paratypes: two female, one male).

Integument. Body brown to dark brown. Body surface with very small granules (diameter: up to 4 μm). Lamellae and dorsal parts of tutoria with longitudinal lines.

Prodorsum ()LJV 7$, 7&±*). 5RVWUXP URXQGHG,ZLWK LQGLVWLQFW ODWHUDO WXEHUFOHV LQ GRUVDO view. Lamellae broad, longer than half the length of prodorsum. Lamellar cusps with weakly developed median dens. Translamella straight, slightly thinner than lamellae. Rostral (90–94), lamellar (90–94) and interlamellar (102–110) setae long, setiform, VWURQJ, EDUEHG (FRUUHFW OHQJWKV RI VHWDH YLVLEOH LQ ODWHUDO YLHZ; VHH)LJ. 7&). 6HQVLOOL short (32–41), with oval, slightly barbed head. A pair of oval areae porosae Ad present posterior to interlamellar setae.

Notogaster ()LJV 7$; 8$±(). 'RUVRVHMXJDO VXWXUH VOLJKWO\ FRQYH[PHGLDOO\. 7HQ SDLUV RI QRWRJDVWUDO VHWDH (lƻ±ƻo) VHWLIRUP, ZLWK VSDUVH, KDUGO\ YLVLEOH EDUEV.)RXU SDLUV RI round areae porosae present dorsally: Aa (diameter 12–14), A1 (8–12), A2 and A3 (8). $OO O\UL¿VVXUHV ORQJ DQG QDUURZ: im visible in dorsal view; ia, ih and ips visible in lateral view; ip visible in posterior view. Opisthonotal gland opening located laterally to seta h 3.

Lateral part of body ()LJV 7$, 7&, 7'). ([RERWKULGLDO VHWDH (ƻo±ƻ4) VHWLIRUP, EDUEHG. Tutorium with broad cusp distally, bears two small distal dents.Areae porosae Al round (16), slightly visible.

Anogenital region ()LJV 7%; 8)±+). Two pairs of anal (an 1, an 2, 8), three pairs of adanal (12), one pair of aggenital (8) and six pairs of genital (g 1 – g 2, 12; g 3 – g 6, 8) setae present;

)LJ. 7. Africoribates subiasi sp. n.: (A) dorsal view, legs not shown; (B) ventral view, legs, palps and subcapitular setae not shown; (C) lateral view of prodorsum, gnathosoma not shown; (D) rostral VHWD DQG WXWRULXP; (() ODPHOODU VHWD DQG GLVWDO SDUW RI ODPHOOD; ()) LQWHUODPHOODU VHWD; (*) VHQVLOOXP. 6FDOH EDUV $, % = ƻoo ȝP; & = loo ȝP; '±) = ƽo ȝP; * = ƻo ȝP.

setae setiform, thin, slightly barbed. Oval postanal area porosa (16 × 8) present (visible in posterior view). Ovipositor elongate, narrow (216 × 69). Length of lobes 102, length RI F\OLQGULFDO GLVWDO SDUW ll4. $OO VHWDH VHWLIRUP, VPRRWK. /REH VHWDH ȥ 1 § IJ 1 (41) longer than ȥ 2 § IJ a § IJ b § IJ c (20). Six coronal setae k short (12).

)LJ. 8. Africoribates subiasi sp. n.: (A) area porosa Aa and notogastral seta lm; (B) area porosa A1; (C) area porosa A2; (D) area porosa A3; (() SRVWDQDO DUHD SRURVD; ()) JHQLWDO SODWH, ULJKW, DQG HSLPHUDO VHWDH 3a, 4b; (G) anal plate, right; (H) ovipositor; (I) subcapitulum; (J) palp; (K) chelicera. Scale bars A– (= lo ȝP;)±,,. = ƽo ȝP; - = ƻo ȝP.

Epimeral region ()LJ. 7%). $SRGHPHV l, ƻ DQG VHMXJDO DSRGHPH ORQJ, DSRGHPH ³ VKRUW. Epimeral setal formula 3–1–3–3. Setae setiform, slightly barbed. Lateral setae ³ɫ and 4ɫ (36) longer than others (16–20). Circumpedal carina well-developed.

Gnathosoma ()LJV 8,±.). 6XEFDSLWXOXP ORQJHU WKDQ ZLGH: lƻ³ î 8ƻ. +\SRVWRPDO VHWDH a, m, h setiform, slightly barbed; m (24–28) longer than a (20–24) and h (16–20). Two

)LJ. 9. Africoribates subiasi sp. n.: (A) leg I, right, antiaxial view; (B) leg II, without trochanter and femur, right, antiaxial view; (C) genu and tibia of leg III, left, antiaxial view; (D) leg IV, left, antiaxial view. 6FDOH EDU $±' = ƽo ȝP.

pairs of setiform, distally curved, barbed adoral setae (12–16). Palp (length 94) with VHWDWLRQ o±ƻ±l±³±9(+lȦ). &KHOLFHUD (OHQJWK l³l) FKHODWH‒GHQWDWH. &KHOLFHUDO VHWDH setiform, barbed; cha (28–32) slightly longer, than chb (26–30).

Legs ()LJV 9$±'). 7LELDH, ZLWK SURFHVV DQWHURGRUVDOO\. *HQXD, DQG ,, ZLWK SURFHVVHV DQWHURYHQWUDOO\.)HPRUD,9 ZLWK SURFHVV SRVWHURYHQWUDOO\.)RUPXODH RI OHJ VHWDWLRQ DQG VROHQLGLD:, (l±ƽ±³±4±ƻo)>l±ƻ±ƻ@, ,, (l±ƽ±³±4±lƽ)>l±l±ƻ@, ,,, (ƻ±ƻ±l±³±lƽ)>l±l±o@,,9 (l±ƻ±ƻ±³±lƻ)>o±l±o@; KRPRORJ\ RI VHWDH DQG VROHQLGLD LQGLFDWHG LQ Table 1. Setae l" on tarsi I, tibiae I, II and IV, genua I thick, with strongly conical teeth. Solenidia setiform, thin.

+ RORW \ SH: Ƃ (7+,23,$: lo NP VRXWK RI * LQFKL FLW \, & KRORPX) RUHVW ( Hagenia abissinica forming the canopy), 8°53'N: 39°09'E, 2810 m, in litter, 28.xi.2010, L.B. Rybalov & A.I. Bastrakov (ZISP).

3DUDW\SHV: ƻƂ, lƃ %DOH 0RXQWDLQV 1DWLRQDO 3DUN, SODWHDX 6DQHWWL, %DWX PRXQWDLQ SHDN, Ϭ°49‵1:³9°49‵(, 4367 m, plants Artemisia spp. and Oxytriops VSS., ƻ³.[L.ƻoo9, /.%. 5\EDORY (lƂ, lƃ 6=01; lƂ 3&).

Distribution: At present, this species is only known from Ethiopia.

Remarks: In having the combination of long interlamellar setae (as long as lamellae), morphology of lamellae and translamella, granulate body surface and presence of notogastral setae, A. subiasi sp. n. is similar only to A. maximus Mahunka, 1984 from Tanzania (Mahunka 1984 b); however, it differs from the latter by the smaller body size (531–564 × 348–381 in the new species; 671–707 × 419–444 in A. maximus ) and presence of areae porosae (sacculi in A. maximus ).

In having the combination of a granulate body surface, presence of notogastral setae and areae porosae, A. subiasi sp. n. is similar to A. ornatus Evans, 1953 from Tanzania ( Evans 1953; Mahunka 1984 a); however, it differs from the latter by having larger body size (531–564 × 348–381 in the new species; 429–454 × 295–324 in A. ornatus ) and long interlamellar setae, as long as lamellae (obviously shorter than lamellae in A. ornatus ).

In having the combination of the morphology of lamellae and translamella, granulate body surface and presence of areae porosae, A. subiasi sp. n. also is similar to A. evansi Balogh, 1959 from Angola and Congo ( Balogh 1959 a). The problem in the comparative analysis, however, is that the length and structure of interlamellar setae is unknown in A. evansi . Balogh (1959 a) wrote that the interlamellar setae are broken in the specimen available to him for study. However, A. subiasi sp. n. can be differentiated from A. evansi by having larger body size (531–564 × 348–381 in the new species; 415–420

× 270–275 in A. evansi ), body surface without obscure polygonate structure (with obscure polygonate structure in A. evansi ), notogastral setae relatively longer (longer than diameter of bothridia in new species; shorter in A. evansi ); areae porosae Aa and A1 larger (as diameter of bothridia in new species; obviously smaller in A. evansi ), short sensilli (sensillar stalk shorter than diameter of bothridia in new species; as long as diameter of bothridia in A. evansi ).