Micherdzinskiiobovella petofii, Tang & Zhang & Guo & Luo & Jiang & Pan, 2023

Tang, Jin, Zhang, Gongaote, Guo, Junqi, Luo, Lingxuan, Jiang, Jiamei & Pan, Hongbo, 2023, Resurrection Of The Genus Micherdzinskiiobovella Hirschmann, 1989, With The Description Of M. Petofii Sp. N. From Singapore (Acari: Mesostigmata: Urodinychidae), Acta Zoologica Academiae Scientiarum Hungaricae 69 (2), pp. 127-138 : 131-135

Micherdzinskiiobovella petofii sp. n.

http://zoobank.org/ 1A06D7F7-8A30-4FBD-A2E2-6C43091F2C68 ( Figs 1–16 )

Material examined – Holotype. Female. “ SHBH/4 Singapour, NNW MacRichie Re ­ sevoir, teste de forét primaire entoures forest secondaire en debut de Campnosperma prélévemal de sol 40 m, 21. XI. 1996, B. Hauser coll.”. Paratypes. Four males , with same collection data as those for holotype .

Diagnosis – Dorsal and ventral idiosoma without sculptural pattern. Ventral setae long and smooth. Dorsal setae short and smooth. Genital shield of female scutiform, its surface smooth, only some dots visible at level of st4.

Description – Female (n = 1). Shape of idiosoma oval, color yellowish brown, flat. Length of idiosoma 630, width at level of coxae IV 540.

Dorsal idiosoma ( Figs 1 , 13 and 16 ). Marginal and dorsal shields fused anterolaterally. Surface of dorsal shield without sculptural pattern. More than 35 pairs of dorsal setae short and smooth (ca 9–16). Dorsal shield bears 5–6 pairs of poroids and lyriform fissures. Surface of marginal shield smooth, without any sculptural pattern. Marginal shield bears 15–16 pairs of long (ca 9–12) and smooth setae on central area, and more than 45 pairs of short (ca 6–7) and smooth setae close to outer margin of this shield. Five pairs of poroids and lyriform fissures situated on marginal shield, caudal inner margin of marginal shield undulate.

Ventral idiosoma ( Figs 2 , 14 ). Five pairs of sternal setae short (ca 6–9), needle-like and smooth. Setae st1 inserted at level of anterior margin of coxae II, st2 at level of mid­coxae II, st3 and st4 at level of mid­coxae III, st5 close to basal margin of genital shield. Sternal shield smooth, one pairs of poroids and one pairs lyrifissures situated close to st1, one and one pair of poroids close to st2 and st3, and some poroids close to inner margin of coxae IV. Nine pairs of ventral setae anterior to anal opening narrow and long (ca 28–43). Ten pairs of ventral setae posterior to anal opening short (ca 15–19) and robust. First pair of adanal setae (ad1) longer (ca 20–23) than second pair (ad2) (ca 15–16). Postanal setae similar in shape and length to ventral setae posterior to anal opening. Anal plate rounded, ca 23 long and ca 20 wide. Genital shield linguliform, length 120, basal width 71 situated between coxae II and IV; majority of surface of genital shield smooth, only some dots situated at level of coxae III. Stigmata situated at level of coxae II. Poststigmatid part of peritremes short and curved, prestigmatid part long and M-shaped ( Fig. 15 ). Metapodal line presented. Pedofos­ sae deep, their surface smooth, with separate furrow for tarsi IV. Tritosternum with vase-like base, laciniae divided several smooth branches. (Fig. 3).

Gnathosoma (Fig. 4). Corniculi smooth and horn-like, internal malae smooth, shorter than corniculi. Hypostomal setae h1 long (ca 120–23), phylliform and centrally broaded. Setae h2 very short (ca 4–5), h3 and h4 ca 12–14 long, h3 smooth, h4 marginally serrate. Chelicerae with internal sclerotized nodes (Fig. 6). Fixed digit of chelicerae (ca 43–45) slightly longer than movable digit (ca 39–40); movable digits of chelicerae bearing a large tooth, fixed digit without any teeth. Palp trochanter setae v1 longer (ca 23–24) and smooth, v2 shorter (ca 14–15) and trifurcated. Other setae on palp segments smooth. Palp apotele bi­ furcate (Fig. 5). Epistome apically pilose.

Legs. Length of legs (from base of coxae to apex of tarsi): I 250–256, II 245–253, III 305–310, IV 310–315. Leg I with ambulacral claws; majority of setae on all legs smooth and needle-like, except some setae on ventral part of tarsi II–IV (Figs 7–10).

Male (n = 3). Body 590–630 long and 490–540 wide.

Dorsal idiosoma. As in female.

Ventral idiosoma. Intercoxal area, with sternal setae and genital shield, as in Figure 11. Sternal setae ca 5–9 long, smooth and needle-like. Setae st1 inserted at level of anterior margin of coxae II, st2 at level of mid­coxae II, st3 at level of mid­coxae III, st4 close to anterior margin of genital shield, st5 close to basal margin of genital shield. Surface of sternal shield without any sculptural pattern. One pair of lyriform fissure situated close to anterior margin of sternal shield, other one pair situated close to lateral margin of genital opening. On pair of poroid situated close to st2, and other one close to st3, third close to inner margin of coxae III and last pair close to genital opening. Genital shield rounded, slightly longer than wide (ca 41–44 × 30–33) and situated between coxae IV (Fig. 11). Other characters as in female.

Figs 3–10. Micherdzinskiiobovella petofii sp. n.: 3–10 = holotype, female: 3 = tritosternum, 4 = gnathosoma in ventral view, 5 = palp in lateral view, 6 = chelicera in lateral view, 7 = leg I in ventrolateral view, 8 = leg II in ventrolateral view, 9 = leg III in ventrolateral view, 10 = leg IV in ventrolateral view; 11–12 = male, paratype: 11 = intercoxal area of, 12 = femur II of male paratype

Developmental stages. Unknown.

Etymology – The species name is dedicated to Sándor Petőfi (1823–1849), the famous national poet of Hungary to commemorate the 200th anniversary of his birth.

Remarks – Only four known Micherdzinskiiobovella species were described without sculptural patterns ( M. levigata , M. makilingensis , M. multisetosa , and M. pauxillaoides ). However, these species have short ventral setae anterior to the anal opening, contrary to the new species, which has long ventral setae anterior to the anal opening (see the key).

idiosoma in lateral view

Figures

Fig. 1. Micherdzinskiiobovella petofii sp. n., holotype, female, dorsal view

Fig. 2. Micherdzinskiiobovella petofii sp. n., holotype, female, ventral view

Figs 13–16. Photos of Micherdzinskiiobovella petofii sp. n., holotype, female: 13 = idiosoma in dorsal view, 14 = idiosoma in ventral view, 15 = peritrema and female genital shield, 16 =