Plonaphacarus longisetosus Niedbała, 2019

Niedbała, Wojciech & Ermilov, Sergey G., 2019, Ptyctimous Mites (Acari, Oribatida) From Côte D’Ivoire With Description Of Three New Species, Acta Zoologica Academiae Scientiarum Hungaricae 65 (2), pp. 85-93 : 87-92

Plonaphacarus longisetosus Niedbała sp. n.

( Fig. 1 A-I)

Measurements. Prodorsum: length 368, width 252, height 151; prodorsal setae: ss 116, in 233, le 172, ro 129, ex 33; notogaster: length 757, width 525, height 535; notogastral setae: c 1 187, c 1 /c 1 -d 1 = 1.2, h 1 190, ps 1 185; genitoaggenital plate 182 × 116; anoadanal plate 258 × 131.

Integument. Colour light brown. Surface of body finely dotted.

Prodorsum. Prodorsum with distinct lateral carinae. Posterior furrows absent. Sigil- lar fields narrow and long, median field in anterior part conically elongated. Sensilli long, rigid, swollen in distal half, covered with small spines. Interlamellar and lamellar setae similar in shape and length, erect, rigid, long covered with small spines in distal half, simi- lar to notogastral setae. Rostral setae long, rigid, rough; evenly thick. Exobothridial setae short, smooth, spiniform. Relative length of setae: in> le>ro>ss>ex.

Notogaster. Notogaster with 15 pairs of moderately long (c 1> c 1 -d 1) setae, stout covered with small spines in distal half. Setae c 1 and c 3 located near anterior border, setae c 2 remote from border. Vestigial setae invisible. Two pairs of lyrifissures ia and im present.

Ventral region. Setae h of subcapitular mentum shorter than distance between them. Formula of genital setae: 4+2: 3. Anoadanal plates with five pairs of poorly ciliate setae; setae ad 2 longest, curved distally, equally thick as rostral setae; anal setae shorter than ad 1, but longer than ad 3.

Legs. Formulas of setae and solenidia of “complete type ”. Setae d of femora located almost at anterior end of article, setae v´ very small.

Type material. Holotype: Côte d’Ivoire, Oumé region , village Goulikao (6°31’N, 5°30’W, 200 m a.s.l.), primary forest, ferralitic soil, June 2007 (rainy season), collected by Julien K. N’Dri.

Type deposition. The holotype (70% ethanol with drop of glycerol) is deposited in DATE.

Etymology. The specific name longisetosus refers to the length of interlamellar and lamellar setae.

Remarks. The new species is easily distinguished from its congeners by the presence of long, similar in shape interlamellar and lamellar setae. No other species of afrotropical Plonaphacarus has such setae. Similar prodorsal and notogastral setae has Protophthiracarus diatropos Niedbała et Starý, 2014 from Cameroon (see NIEDBAŁA & STARÝ 2014), but in addition to being of a different genus has very long prodorsal lateral carinae, posterior furrows and vestigial exobothridial setae. Another slightly similar interlamellar and lamel- lar setae has afrotropical species of another genus Steganacarus (Rhacaplacarus) pervigens ( Niedbała, 1988) from the Democratic Republic of the Congo (see NIEDBAŁA 1988), but has different length of sigillar fields, shape of sensilli and rostral setae and four pairs of lyrifissures.

Hoplophthiracarus brevispinus Niedbała sp. n.

( Fig. 2 A-H)

Measurements. Prodorsum: length 399, width 273, height 136; prodorsal setae: ss 66, in 38, le 40, ro 48; notogaster: length 778, width 535, height 616; notogastral setae: c 1 68, c 1 / c

1

–d

1

= 0.45, h

1

63, ps

1

71; genitoaggenital plate 217 × 131; anoadanal plate 328 × 126.

Integument. Colour dark brown. Surface of body covered with weakly expressed concavities.

Prodorsum. Prodorsum with weak median crista. Lateral carinae distinct. Posterior furrows absent. Sigillar fields distinct, narrow, long, similar in length. Sensilli short, club shaped, with irregular edges. Interlamellar, lamellar and rostral setae short, spiniform, rough. Exobothridial setae vestigial. Relative length of setae: ss> ro> le> in.

Notogaster. Notogaster with 15 pairs of short, spiniform, rough setae (c 1 <c 1 –d 1). Se- tae c 1 and c 2 remote from anterior margin more than setae c 3. Vestigial setae f 1 invisible. Two pairs of lyrifissures ia and im present.

Ventral region. Setae h of subcapitular mentum shorter than distance between them. Genitoaggenital plates with 9 pairs of setae with formula: 6(4+2): 3. Anoadanal plates each with 5 setae, 2 anal and 3 adanal, spiniform, rough except setae ad 2. Setae ad 2 evenly thick, longest and thickest, ad 3 smallest.

Legs. Formulas of setae and solenidia of “complete type ”. Setae d on femora I slightly remote from distal end of article, setae v´ very small, situated ventral from v ˝.

Type material. Holotype: Côte d’Ivoire, Oumé region , village Goulikao (6°31’N, 5°30’W, 200 m a.s.l.), primary forest, ferralitic soil, June 2007 (rainy season), collected by Julien K. N’Dri.

Type deposition. The holotype (70% ethanol with drop of glycerol) is deposited in DATE.

Etymology. The specific epithet brevispinus comes from Latin for “short” and “spine” and alludes to small, spiniform setae of body.

Remarks. New species looks similar to several other species of Hoplophthiracarus recently described from Cameroon ( NIEDBAŁA & STARÝ 2014). Among them the most similar is H. spinus Niedbała et Starý, 2014 by the relatively short setae of body and some similarity of sensilli. The new species is distin- guishable from it by longer and narrower sigillary fields equal in length (in H. spinus lateral fields are shorter than median), the absence of posterior furrows of prodorsum (versus presence of fields), the similar length and shape of in- terlamellar and lamellar setae (versus interlamellar setae longer, covered with small spines, lamellar setae shorter, spiniform), and by spiniform, rough and shorter notogastral setae (versus setae longer, ciliate at one side).

of leg I, H = tibia of leg IV. Scale bars: 100 µm (A–C, E, F), 50 µm (D, H, G)

Atropacarus (Hoplophorella) paratuberculosissimus Niedbała sp. n.

( Fig. 3 A-G)

Measurements. Prodorsum: length 318, width 202, height 192; prodorsal setae: ss 131, in 144, le 23, ro 28; notogaster: length 515, width 431, height 374; notogastral setae: c 1 46, c 1 / c

1

–d

1

= 0.23, d

1

40, h

1

25, ps

1

20; genitoaggenital plate 151 × 136; anoadanal plate 192 × 141.

Integument. Colour light brown. Body strongly sculptured, covered with strong ribs, foveoles and rugae; notogaster with tubercles.

Prodorsum. Prodorsum with powerful anteromedian crista. Lateral carinae absent. Posterior furrows well developed. Sigillar fields invisible because of strong sclerotization. Sensilli long, like stick, without head, obtuse distally, rough. Interlamellar setae similar to sensilli also stick-shaped, but pointed distally, rigid and rough. Lamellar setae spiniform, bent, rough. Rostral setae also spiniform but slender, directed downwards, rough. Exobo- thridial setae vestigial. Relative length of setae: in> ss> ro> le.

Notogaster. Notogaster with anterior hood. Setae very short (c 1 <c 1 –d 1), thin, fine and curved, inserted on tubercles. Setae c 1 – c 3 remote from anterior margin. Vestigial setae and lyrifissures invisible because strong sculpture.

Ventral region. Setae h of subcapitular mentum shorter than distance between them. Genitoaggenital plates with formula of genital setae: 6: 3. Anoadanal plates with setae ad 2 slightly conical and ad

3

spiniform longer than other setae.

Legs. Formulas of setae and solenidia of “complete type ”. Setae d of femora I remote from distal end of article, setae v´ very short, situated ventral from v ˝.

Type material. Holotype: Côte d’Ivoire, Oumé region , village Goulikao (6°31’N, 5°30’W, 200 m a.s.l.), primary forest, ferralitic soil, June 2007 (rainy season), collected by Julien K. N’Dri.

Type deposition. The holotype (70% ethanol with drop of glycerol) is deposited in DATE.

Etymology. The prefix para is Latin meaning “near” and refers to the similarity of new species to Atropacarus (Hoplophorella) tuberculosissimus ( Mahunka, 1978) .

Remarks. The new species is easily distinguishable from congeners by the presence of tubercles on notogaster and very long sensilli and interlamel- lar setae. It is similar to widely distributed afrotropical species Atropacarus (Hoplophorella) tuberculosissimus ( Mahunka, 1978) by the presence of tubercles on notogaster, but differs by the presence of interlamellar setae very long (ver- sus minute), very strong anterior crista of prodorsum (versus not so strong), smaller anterior hood of notogaster (versus distinctly larger hood), longer ad 2 and ad 3 setae of anoadanal plates (versus these setae minute).