Ocesobates schatzi, 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 : 329-332

Ocesobates schatzi sp. n.)LJV 4±Ϭ Etymology: 7KH VSHFL¿F QDPH LV GHGLFDWHG WR RXU FROOHDJXH, WKH DFDURORJLVW 'U +HLQULFK 6FKDW] (,QVWLWXWH RI (FRORJ\, /HRSROG‒)UDQ]HQV 8QLYHUVLW\ RI,QQVEUXFN, $XVWULD), ZKR KDV FRQWULEXWHG VLJQL¿FDQWO\ WR WKH VWXG\ RI RULEDWLG PLWHV WKURXJKRXW WKH ZRUOG.

)LJ. 4. Ocesobates schatzi sp. n.: (A) dorsal view, legs not shown; (B) ventral view, legs, epimeral setae 2a, palps and subcapitular setae not shown; (C) lateral view of prodorsum, gnathosoma not shown; (D) URVWUXP, GRUVR‒DQWHULRU YLHZ. 6FDOH EDUV $±& = loo ȝP; ' = lo ȝP.

Diagnosis: The new species is distinguished by the following combination of character VWDWHV: ERG\ VL]H 4lƽ±4Ϭ4 î ƻ8ƻ±³lƽ; URVWUXP 8‒VKDSHG; LQWHUODPHOODU VHWDH ZLWK ÀD‒ gellate and strongly curved tips; epimeral, genital and aggenital setae longer than anal setae; two pairs of adanal setae present.

Description:

Measurements. Body length 448 (holotype, female), 415–464 (two paratypes, females); body width 315 (holotype, female), 282–315 (two paratypes, females).

)LJ. ƽ. Ocesobates schatzi sp. n.: (A) rostral seta and tutorium; (B) lamellar seta and cusp; (C) interlamellar seta; (D) sensillum; (E) genital plate, left and epimeral setae 3a, 3b, 4a, 4b; ()) DQDO SODWH, OHIW DQG DGDQDO VHWDH; (*) RYLSRVLWRU. 6FDOH EDUV $±&, * = ƽo ȝP; '±) = ƻo ȝP.

Integument. Body brown. Body surface smooth.

Prodorsum ()LJV 4$, 4&, 4'; ƽ$±'). 5RVWUXP 8‒VKDSHG (ZLWK GHHS LQGHQWDWLRQ PHGLDOO\ and two lateral teeth, one on each side. Lamellae narrow, half the length of prodorsum. Lamellar cusps minute, truncate distally. Rostral (82–90) and lamellar (102–114) setae

)LJ. Ϭ. Ocesobates schatzi sp. n.: (A) left part of subcapitulum; (B) palp; (C) chelicera; (D) leg I, right, DQWLD[LDO YLHZ; (() OHJ ,,, ULJKW, DQWLD[LDO YLHZ; ()) JHQX DQG WLELD RI OHJ ,,,, OHIW, SDUD[LDO YLHZ; (*) OHJ,9, ULJKW, DQWLD[LDO YLHZ. 6FDOH EDUV $, &±* = ƽo ȝP; % = ƻo ȝP.

VHWLIRUP, EDUEHG.,QWHUODPHOODU VHWDH l9Ϭ±ƻl³, VHWLIRUP, ZLWK ÀDJHOODWH DQG VWURQJO\ curved tips. Sensilli 32–36, clavate, with oval, rounded distally and hardly barbed head. Notogaster ()LJ. 4$). 'RUVRVHMXJDO VXWXUH VOLJKWO\ FRQYH[PHGLDOO\. 7HQ SDLUV RI QRWR‒ JDVWUDO DOYHROL SUHVHQW.)RXU SDLUV RI DUHDH SRURVDH GHYHORSHG GRUVDOO\: Aa round (diameter 16), A1, A2, A3 RYDO (lƻ î Ϭ±8). $OO O\UL¿VVXUHV DQG RSLVWKRQRWDO JODQG RSHQLQJ located typically as for Ocesobates .

Lateral part of body ()LJV 4&; ƽ$). ([RERWKULGLDO VHWDH DEVHQW, RQO\ DOYHROL SUHVHQW. 7X‒ torium long, thin, weakly dilated in median part, with thin and smooth cusp distally.

Anogenital region ()LJV 4%; ƽ(±*). Two pairs of anal setae (an 1 16–20, an 2 12–16), thin, slightly barbed.Two pairs of adanal setae minute (4). One pair of aggenital (41–45) and six pairs of genital (g 1 – g 3, 28–32; g 4 – g 6, 20–24) setae setiform, barbed. Anterior margins of genital plates with three pairs of genital setae (g 1 – g 3). Ovipositor 171 × 82, typical as for Chamobatidae ( Ermilov 2010) . Length of lobes 69, length of cylindrical GLVWDO SDUW loƻ. $OO VHWDH VHWLIRUP, VPRRWK. /REH VHWDH ȥ 1 § IJ 1 (41) longer than ȥ 2 § IJ a § IJ b § IJ c (20). Six short (12) coronal setae k present.

Epimeral region ()LJ. 4%). $SRGHPHV l, ƻ, VHMXJDO DSRGHPH DQG YHU\ VKRUW DSRGHPH ³ present. Epimeral setal formula 3–1–3–3.All setae long and barbed. Setae 1a, 2a and 3a (20) shorter than others (41–53). Custodium short, extending anteriorly to pedotectum II. Circumpedal carina well visible.

Gnathosoma ()LJV Ϭ$±&). 6XEFDSLWXOXP ORQJHU WKDQ ZLGH: 9o î 7³. +\SRVWRPDO VH‒ tae setiform, slightly barbed; m (28–32) longer than h (24–28) and a (16). Two pairs of setiform, curved distally, slightly barbed adoral setae (8–12). Palp (length 61–65) ZLWK VHWDWLRQ o±ƻ±l±³±9(+lȦ). &KHOLFHUD (OHQJWK 94) FKHODWH‒GHQWDWH. &KHOLFHUDO VHWDH setiform, barbed; cha (36–41) slightly longer, than chb (24–28).

Legs ()LJV Ϭ'±*). 7LELDH, ZLWK WXEHUFOH DQWHULRGRUVDOO\. *HQXD, ZLWK SURFHVVHV DQWHULRYHQWUDOO\.)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 7DEOH l. 6HWDH VHWLIRUP, VOLJKWO\ EDUEHG.)DPXOXV short, blunt-ended. Solenidia setiform.

+ RORW \ SH: Ƃ (7+,23,$: %DOH 0RXQWDLQV 1DWLRQDO 3DUN,+ DUHQQD) RUHVW ( ZRRG VSHFLHV, LQ SDUWLFXODU, Hagenia abissinica forming canopy), 6°42'N: 39°43'E, 2249 m, in soil, 23.xi.2009, L.B. Rybalov (ZISP).

3DUDW\SHV:lƂ VDPH GDWD DV KRORW\SH (6=01); lƂ lo NP VRXWK RI * LQFKL FLW \,& KRORPX) RUHVW ( H. abissinica forming canopy), 8°53'N: 38°09'E, 2920 m, Wenchi crater, plants on rock, 20.xi.2010, L.B. Rybalov & A.I. Bastrakov (PC).

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

Remarks: The new species clearly differs from all the species of Ocesobates ( O. boedvarssoni ( Sellnick, 1974) from Europe (see also Gjelstrup 1978; Mahunka 2008), O. bregetovae Shaldybina, 1974 from the southern Palearctic region and O. kumadai Aoki, 1965 from Japan) by larger body length (415–464 in new species; 326–371 in O. boedvarssoni ; 280–330 in O. bregetovae ; 250–256 in O. kumadai ), morphology of LQWHUODPHOODU VHWDH (ZLWK ÀDJHOODWH, VWURQJO\ FXUYHG WLSV LQ QHZ VSHFLHV; VHWLIRUP LQ O. kumadai and O. bregetovae ; setiform, with thickened ends or setiform in O. boedvarssoni ) and number of adanal setae (two pairs in new species; three pairs in the other species). Aoki (1965), Sellnick (1974) and Gjelstrup (1978) listed the characters of Ocesobates , one of which was the presence of three pairs of adanal setae. However, O. schatzi has two pairs of adanal setae. This should be indicated in any future diagnosis of the genus.