Pleuronectocelaeno barbara Athias-Henriot, 1959

Xu, Yun, Li, Xiang & Zhang, Fei-Ping, 2019, Two new records of the Family Celaenopsidae (Acari: Mesostigmata) from China, with description of a new species, Zootaxa 4604 (2), pp. 326-334 : 327

Pleuronectocelaeno barbara Athias-Henriot, 1959

Pleuronectocelaeno austriaca var. barbara Athias-Henriot, 1959: 30 .

Pleuronectocelaeno barbara — Kinn, 1968: 194; Kinn, 1991: 105; Khaustov, Trach & Bobylev, 2016: 138; Khaustov et al., 2018: 6; Trach & Khaustov, 2018: 2264.

Pleuronectocelaeno drymoecetes Kinn, 1968: 194 . (synonymy by Kinn, 1991).

Diagnosis. Adult female ( Figs 1–2 ). Shape oval, rounded anteriorly and posteriorly; covered with ornamentation in form of elongate cells and more than 100 simple setae and numerous irregularly placed small circular pores; sternal plate wider than long, anterior margin truncate and posterior deeply concave, with three pairs of simple setae and network of sculpture lines; metasternal plates triangular, lying between coxae II and III, bearing one pair of setae and one posterior pore-like structure; ventral, anal, parapodal, peritremal, and metapodal shields fused, forming genito-ventrianal shield; anterior margin of this shield truncate and convex medially; shield with ornamentation in form of elongate cells and 20 pairs of simple setae; ventromarginal shields free, extending to level of coxae II; each bearing two setae; post-anal plate absent.

Adult male ( Figs 3–4 ). Holoventral shield bearing about 28 pairs of simple setae; shield with reticulate transverse ornamentation; peritremes extending to posterior level of coxae I. Ventromarginal shields free, extending to level of coxae II; each one bearing two setae; reticulate like holoventral shield. Setae st 1 – st 3 thickened; other ventral setae simple.

Material examined. 1 female and 2 males, China, Shaxian county, Sanming city, Fujian province, 6 April 2017, by Yun Xu and Lie-qing Fu, from rotten wood and barks of Pinus massoniana Lamb .

Hosts. This species has been collected from the bark of dead Pinus halepensis , Ips acuminatus ( Sellnick 1951) , I. typographus ( Kinn 1991) , Tomicus minor , Hylurgops palliatus , Pityogenes bistridentatus , Taphrorychus bicolor ( Khaustov 1997) , Pityocteines curvidens ( Pernek et al. 2012) , Crypturgus cinereus ( Plumari 2008) , Orthotomicus erosus ( Ahadiyat et al. 2012) , Dendroctonus frontalis , Ips avulsus , I. calligraphus , I. confusus , I. grandicollis , I. crebricollis , I. typographus , Orthotomicus sabinianae ( Hofstetter et al. 2015) , and Pityogenes chalcographus ( Khaustov et al. 2016) , and the bark of dead Pinus massoniana Lamb.

Distribution. Algeria, North America, Sweden, Denmark, Crimea, Croatia, Italy, Iran, Western Siberia, Russia and China. This is the first record of P. barbara in China.

Figures

FIGURES 1–4. Pleuronectocelaeno barbara. 1–2. female, dorsal and ventral views, respectively; 3–4. male, dorsal and ventral views, respectively. Scale bar: 100 µm.