Atropacarus (Hoplophorella) gibbus, Niedbała, Wojciech & Starý, Josef, 2014

Niedbała, Wojciech & Starý, Josef, 2014, New and little known species of ptyctimous mites (Acari, Oribatida) from Cameroon, Zootaxa 3889 (1), pp. 31-57 : 52-55

Atropacarus (Hoplophorella) gibbus sp. nov.

( Fig. 12A–J )

Measurements of holotype. Prodorsum: length 328, width 222, height 151; prodorsal setae: sensillus 126, interlamellar (in) 15, lamellar (le) 20, rostral (ro) 63, exobothridial (ex) 13; notogaster: length 646, width 374, height 384; notogastral setae: c 1 53, h 1 43, ps 1 51; genitoaggenital plate 147×137; anoadanal plate 152×76.

Description. Colour light brown. Surface of body covered with feeble concavities and also by cerotegument.

Prodorsum with strong median carina. Lateral carinae and posterior furrows absent. Sigillar fields distinct, median widened towards rostral setae. Sensilli long, narrow, filiform, ciliated in distal half. Interlamellar and lamellar setae short, spiniform, rigid. Rostral setae considerably thicker, longer, rough, considerably distanced, directed inwards. Exobothridial setae minute.

Notogaster with strong median, anterior hood and other positioned laterally, one pair posterior smaller tubercules with setae ps 2 and ps 3 and the smallest with setae e 2 and h 2. Notogastral setae short (c 1/ c 1- d 1=0.27), filiform, flexible. Setae c 1—3 situated near anterior notogastral margin. Vestigial setae f 1 slightly posterior of setae h 1. Two pairs of lyrifissures ia and im present.

Ventral region. Setae h of mentum shorter than distance between their insertion points. Genitoaggenital plates with formula of genital setae: 6: 3. Anoadanal plates with adanal setae ad 2 dagger-like, the same length as filiform adanal setae ad 3, setae ad 1, and anal setae minute.

FIGURE 13A–F. Acrotritia ardua ( C. L. Koch, 1841) , A, prodorsum, lateral view; B, sensillus; C, tarsus I; D, tarsus II; E, tarsus III; F, tarsus IV; G–J. Arphthicarus sculptilis ( Niedbała, 1988) , G, prodorsum, dorsal view; H, prodorsum, lateral view; I, setae c 1; J, right anoadanal plate.

Legs. Chaetome of legs complete type. Setae d of femora I slightly remote from distal end of article. Distance between setae v' and v" greater than length of setae v".

Material examined. Holotype is deposited at DATE from the locus typicus: South–West Province, Korup National Park, 12–16. V. 2006, Rengo Camp, about 8 km NW of Mundemba, latitude 05°02'11.64" N, longitude 08°49'45.96" E, altitude 300 m, litter and soil sifting sample, leg V. Grebennikov.

Etymology. The specific name gibbus is Latin for “a hump” and alludes for humped body of species.

Comparison. The new species is easily distinguishable from congeners by the arrangement of notogastral hood and tubercules, long, distanced, directed inwards rostral setae and shape and arrangement of setae of anoadanal plates.

Figures

FIGURE 12 A – J. Atropacarus (Hoplophorella) gibbus sp. nov. (holotype). A, prodorsum, dorsal view; B, prodorsum, lateral view; C, prodorsum, dorsal view; D, opisthosoma, lateral view; E, opisthosoma, dorsal view; F, mentum of subcapitulum; G, right genitoaggenital plate; H, paraxial part of right genitoaggenital plate; I, right anoadanal plate; J, trochanter and femur of leg I.