Africoribates amorphus, 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 : 338-341

Africoribates amorphus sp. n.

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Etymology:)URP /DWLQ amorphus (shapeless), referring to the amorphous areae porosae. Diagnosis: The new species is distinguished by the following combination of character states: body size 431–448 × 282–290; body surface granulate; dorsal parts of tutorium with longitudinal lines; lamellae of medium width; translamella narrow; lamellar setae longer than interlamellar and rostral setae; sensilli short, with oval, slightly barbed head; notogastral setae setiform, slightly barbed; four pairs of amorphous, round areae porosae present; thick leg setae absent.

Description:

Measurements. Body length 431 (holotype, female), 448 (paratype, female); body width 290 (holotype, female), 282 (paratype, female).

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

Prodorsum ()LJV lo$, &±*). 5RVWUXP URXQGHG LQ GRUVDO YLHZ. /DPHOODH VOLJKWO\ ORQJHU than half the length of the of prodorsum. Lamellar cusps with weakly developed lateral and medial tooth. Lamellae of medium width. Translamella narrow, straight. Rostral (36–41), lamellar (86–90) and interlamellar (69–77) setae long, setiform, thickened, VOLJKWO\ EDUEHG (FRUUHFW OHQJWKV RI VHWDH YLVLEOH LQ ODWHUDO YLHZ;)LJ. lo&). 6HQVLOOL VKRUW (28–32), with oval, slightly barbed head. A pair of areae porosae Ad indistinct.

Notogaster ()LJV lo$; ll$). 'RUVRVHMXJDO VXWXUH VOLJKWO\ FRQYH[PHGLDOO\. 7HQ SDLUV RI QRWRJDVWUDO VHWDH (8) VHWLIRUP, ZLWK VSDUVH, KDUGO\ YLVLEOH EDUEV.)RXU SDLUV RI VPDOO (GLDPHWHU 8), LQGLVWLQFW (VOLJKWO\ YLVLEOH RQO\ XQGHU KLJK PDJQL¿FDWLRQ), ERUGHUOHVV DUHDH SRURVDH SUHVHQW GRUVDOO\. $OO O\UL¿VVXUHV ORQJ DQG QDUURZ. 2SLVWKRQRWDO JODQG RSHQLQJ (gla) located posterolaterally to areae porosae A1.

Lateral part of body ()LJV lo&, lo'). ([RERWKULGLDO VHWDH (ƻ4) VHWLIRUP,EDUEHG.7XWRULXP with broad rounded cusp distally. Areae porosae Al absent.

Anogenital region ()LJV lo%; ll%±'). Two pairs of anal (12), three pairs of adanal (16), one pair of aggenital (8) and six pairs of genital (g 1 – g 2, 8; g 3 – g 6 ,12) setae present; setae setiform, thin, slightly barbed. Anal plates of paratype with three pairs of anal setae. Oval postanal area porosa absent. Ovipositor elongate, narrow (167 × 57). Length of lobes 65, length of cylindrical distal part 102. All setae setiform, smooth. Lobe setae ȥ 1 § IJ 1 (32) longer than ȥ 2 § IJ a § IJ b § IJ c (16). Six coronal setae k short (12).

Epimeral region ()LJ. lo%). $SRGHPHV l, ƻ DQG VHMXJDO DSRGHPH ORQJ, DSRGHPH ³ VKRUW. Epimeral setal formula 3–1–3–3. Setae (12–16) setiform, slightly barbed. Circumpedal carina well-developed.

Gnathosoma ()LJV ll(±*). 6XEFDSLWXOXP ORQJHU WKDQ ZLGH: loϬ î 8Ϭ. +\SRVWRPDO setae a, m, h setiform, slightly barbed; m (24) longer than a and h (16). Two pairs of setiform, distally curved, barbed adoral setae (12). Palp (length 73) with setation o±ƻ±l±³±9(+lȦ). &KHOLFHUD (OHQJWK llo) FKHODWH‒GHQWDWH. &KHOLFHUDO VHWDH VHWLIRUP, barbed; cha (28) slightly longer, than chb (26).

Legs ()LJV lƻ$±'). 7LELDH, ZLWK ZHDNO\ GHYHORSHG SURFHVV DQWHURGRUVDOO\. *HQXD, DQG ,, ZLWK SURFHVVHV DQWHURYHQWUDOO\.)HPRUD,9 ZLWK ZHDNO\ GHYHORSHG SURFHVV SRVWHURYHQWUDOO\.)RUPXODH RI OHJ VHWDWLRQ DQG VROHQLGLD:, (l±ƽ±³±4±ƻo)>l±ƻ±ƻ@,

)LJ. lo. Africoribates amorphus 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 seta DQG WXWRULXP;(() ODPHOODU VHWD DQG GLVWDO SDUW RI ODPHOOD; ()) LQWHUODPHOODU VHWD; (*) VHQVLOOXP. 6FDOH EDUV $±& = loo ȝP; '±* = ƻo ȝP.

,, (l±ƽ±³±4±lƽ)>l±l±ƻ@, ,,, (ƻ±ƻ(³)±l±³±lƽ)>l±l±o@,,9 (l±ƻ±ƻ±³±lƻ)>o±l±o@; homology of setae and solenidia indicated in Table 1. Thick setae absent. 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\SH: Ƃ %DOH 0RXQWDLQV 1DWLRQDO 3DUN, SODWHDX 6DQHWWL, % DWX PRXQWDLQ SHDN, Ϭ°49‵1:³9°49‵(, 4³Ϭ7 P, plants Artemisia spp. and Oxytriops spp., 23.xi.2009, L.B. Rybalov ( PC).

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

Remarks: In having the combination of long interlamellar setae (as long as lamellae), granulate body surface, presence of notogastral setae and areae porosae, A. amorphus sp. n. is similar only to A. subiasi sp. n. from Ethiopia, however it differs from the latter by having smaller body size (431–448 × 282–298 in A. amorphus ; 531–564 × 348–381

)LJ. ll. Africoribates amorphus sp. n.: (A) area porosa A1; (B) genital plate, left; (C) anal plate of holotype, OHIW;(') DQDO SODWH RI SDUDW \ SH, OHIW; (() VXEFDSLWXOXP, ULJKW OLS ZLWK DGRUDO VHWDH QRW VKRZQ; ()) SDOS; (*) FKHOLFHUD. 6 FDOH EDUV $ = lo ȝP; %±(, * = ƽo ȝP;) = ƻo ȝP .

in A. subiasi ); lamellar setae obviously longer than rostral setae (lamellar setae not longer than rostral setae in A. subiasi ); lamellae smooth (with longitudinal lines in A. subiasi ); translamella narrow (broad, slightly thinner than lamellae in A. subiasi ); tutoria without dens distally (with two dens in A. subiasi ); areae porosae small, amorphous (larger, distinct in A. subiasi ).

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