Allobrinckina belousovi Kaplin, 2019

Kaplin, V. G., 2019, A NEW GENUS AND NEW SPECIES OF BRISTLETAILS OF THE FAMILY NICOLETIIDAE (ZYGENTOMA) FROM SOUTH CHINA, Far Eastern Entomologist 390, pp. 1-12 : 6-11

Allobrinckina belousovi Kaplin , sp. n.

http://zoobank.org/NomenclaturalActs/ 1961A916-6B4E-47C1-99E5-D7FEB96006BD

Figs 1–25

MATERIAL. Holotype – ♂, China: Yunnan province, NW Lijiang, W Yangtze,

Luohe Bas., 3 km WNW Gehuaqing village, 27°34ʹ27ʹʹ N, 99°15ʹ52ʹʹ E, h = 2850 m,

broadleaf forest, near a small river with a stone channel, 06 VI 2018, leg. I.

Belousov, I. Kabak ( VIZR) (in slides). Paratypes – 2 ♀, same locality, data and leg., as for holotype ( VIZR) (1 ♀ in slides; 1 ♀ in 75% alcohol) .

DESCRIPTION. Body length of male 7.6 mm, female 6.5–8.4 mm, head width

1.4–1.5 mm; thorax width 1.6–1.7 mm; urite IX width 0.7–0.8 mm.

Appearance whitish in color, chaetae and scales golden, light golden; mesochaetae and most macrochaetae simple, without an apical bifurcation; some of the longer macrochaetae with apical bifurcation. Pigment lacking. Scales multi-radiate with about 14–18 rays covering body (thoracic tergites, urotergites, urosternites, subgenital plate, coxae) but lacking on head and its appendages, tarsi, tibiae and femora of legs, styli, cerci and median dorsal appendage, ovipositor. Antennae broken in all specimens but at least two thirds head and body. Eyes and ocelli absent.

Head male and females 1.3–1.4 times as wide as long; with numerous setae and several long simple and apically bifurcate macrochaetae in lateral part ( Fig. 1 ). Clypeus with transverse row of eight setae, the outer six setae being apically bifurcate.

Labrum with similar transverse row of six setae, the outer four setae being apically bifurcate, in posterior part of labrum also two simple setae in both sexes. Antennae elongate, scape of female and male 1.5–1.6 times as long as wide, with one row of six simple macrochaetae in the posterior ventral part and also with several irregular more small setae. Pedicellus of male with relatively long finger-shaped apophyses on medial face surfpassing the middle of the 3rd flagellar division, about 3.3 times longer than wide ( Fig 13 ). Dorsal surface of apopohyses with several long and medium setae. Pedicellus of male also with well-developed ventrally fovea with numerous short setae within. Ratio length of fovea to length of apophyses about 0.8,

width of fovea to width of apophyses about 0.7. All flagellar divisions with one row of mainly simple macrochaetae. Posterior part of male and female pedicellus with

5–7 macrochaetae, 3 of them long with apical bifurcation ( Figs 13, 14 ). Dorsal surface of apophyses with one long macrochaetae with apical bifurcation. Divisions of male flagellum with three types of sensillum. First flagellar division with 6, the following four with 2, the next 14 divisions with 0–2 trichobothriae. 4th–15th

divisions of the flagellum with 0–2 campaniform sensilla. 8th–15th divisions with

0–1 rhabdoid sensilla. Number and distribution of macrochaetae and trichobotriae from the divisions of female flagellum as in male. Divisions of female flagellar probably without campaniform and rhabdoid sensilla.

16 – urosternite and urocoxites I; 17, 18, 19 – urosternites II, III, VII, respectively; 20 –

maxillary palp; 21 – urosternite VIII, urocoxites IX, penis and parameres. Scale bars = 0.1 mm.

Mandibles strong with well-developed molar and incisor regions and with external longitudinal row of 5–7 apically bifurcate macrochaetae. Incisor region with 7 incisives ( Fig. 3 ). Around molar area about 20 small conical setae in both sexes. Maxillae of usual form, galea about the same length as the lacinia or slightly shorter with two apical conules ( Fig 4 ); lacinia sclerotized with two apical teeth; pectinate prostheca with about 20–22 narrow projections, 5 rounded apically bifurcate lamellae, first of them is perpendicular, the rest are inclined and about 16–21 setae along margin in both sexes ( Fig 5 ). Maxillary palp long with ultimate palpomere about 6.5 in female and 7.3 in male times longer than wide and 1.4–1.5 times longer than the penultimate palpomere, ultimate palpomere with six papillae of usual form ( Figs 2 , 20 ). Second palpomere with subapical ring of strong apically bifurcate macrochaetae and 4–5

such chaetae in the anterior part of palpomere in both sexes. Labium wider than long.

Each glossa with three relatively short and several small simple setae; its apical part divided into two lobes ( Figs 15 , 23 ). Paragossa with about ten medium and long setae, half of them apically bifurcate and several small setae. Ultimate palpomere of labial palps is about 1.6–1.7 times longer than wide with six papillae of usual type;

the penultimate palpomere with 3–4 very long strong simple setae in both sexes.

Length of thorax about one quarter of body, not wider than the abdomen. Ratio width to length of pronotum 1.92, mesonotum 2.06 and metanotum 2.22 in male and respectively 2.03, 2.16 and 2.23 in female ( Fig 22 ). Mesonotum 1.04–1.05 times longer than pro- and metanotum in both sexes. Mesonotum 1.12 and 1.07 times wider than metanotum in male and female respectively. Anterior margin of pronotum with a numerous small setae and with 2–5 + 2–5 sublateral medium macrochaetae, 1–2

posterior of them apically bifurcate. Posterior margin of all thoracic tergites with 1 +

1 submedian and 2 + 2 sublateral macrochaetae. Submedian and 1 + 1 inner sublateral macrochaetae apically bifurcate. Lateral margin of these tergites with 3–4 +

3–4 macrochaetae in male and 3 + 3 in female. First of them very long and apically bifurcate. Ratio length of this macrochaetae to length of pronotum about 0.36,

mesonotum 0.38–0.42, metanotum 0.40–0.45.

Legs quite elongate. Coxae and femur of male and female widened ( Fig 6 ). Ratios of length to width of coxae, femur, tibia and tarsus as given in Table 1. Legs beco-

ming increasingly long from PI to PIII. Ratio of tarsus length PIII to PI = 1.44 in male and 1.55 in female; tibia = 1.40 and 1.49, femur = 1.10 and 1.20, coxa = 1.20

and 1.20, respectively. Coxae with relatively numerous scales and four long apically bifurcate macrochaetae along the outer margin also with one more small and thing apically bifurcate macrochaeta in posterior part of coxa in both sexes.

Femur with several macrochaetae, also with row of little spines along inner ventral surface in both sexes ( Fig 6 ). Ventral margin of tibia with several simple macrochaetae. Tarsi with four tarsomeres the basal one as long as about 0.40 (outer margin) or 0.55 (inner margin) of its total length on PIII in both sexes; each tarsomere with two rows of stout macrochaetae along its ventral surface. Praetarsus with two strong claws covered by microtrichia on their basal half, without medial empodial claw. Between claws instead of the empodium there is a slightly convex support oval platform with 5–6 transverse ribs in both sexes ( Fig 8 ).

n.

Urotergites I–IX with 1 + 1 submedian, urotergites I–V with 6–8 + 6–8, VI–

VII with 5–6 + 5–6 in male and 3 + 3 in female, VIII–IX with 3 + 3 in male and female sublateral and lateral macrochaetae ( Figs 9, 10 ). Sudmedian and 1–2 + 1–2

sublateral macrochaetae apically bifurcate. Urotergite X trapezoidal with welldeveloped rounded posterior emargination. Ratio width of posterior base of this urotergite to depth of its emargination about 2.1 in female and 1.6 in male ( Figs 11,

12). Posterolateral corners of urotergite X with 1 + 1 apical macrochaetae. These macrochaetae in female long and apically bifurcate and in male more short and simple. Ratios of lengths of macrochaetae and urotergite X about 0.67 in female and 0.35 in male. Urotergite X of male with 16 + 17 lateral pegs and with simple macrochaetae, 6 + 6 of them form two longitudinal rows near the inner part of pegs areas. Outer and inner margin of projections of urotergite X in female with simple macrochaetae.

belousovi sp. n.

Urosternite I divided into a median sternite and two lateral coxites ( Fig 16 ). Urosternites II–VII in female and II–VIII in male entire, styli on urosternites II–IX, 1 +

I eversible vesicles on urosternites II–VI and 1 + 1 pseudovesicles on urosternite

VII ( Figs 17–19, 21 , 25 ). Posterior angle of urosternite I about 83° in male and 74°

in female with two thing simple setae. Ratios of lengths and widths of urosternites and urocoxites given in Table 2. Posterior part of urosternites II–VII with two pairs of relatively long and thin apically bifurcate setae between eversible vesicles. Sublateral margin of urosternites with numerous long and relatively short simple setae.

Subgenital plate in female well-developed, suboval ( Fig 24 ). Ratio length to width of subgenital plate about 0.76.

22 – pro-, meso- and metanotum; 23 – labial palp and ligula; 24 – subgenital plate; 25 –

urocoxites VIII and IX, anterior and posterior gonapophyses. Scale bars = 0.1 mm.

Parameres reach to about 0.55 the length of styli, with several setae along their length and some small apices setulae. Paramera about six times longer than wide.

Penis reachs to about 0.35 the length of parameres ( Fig 21 ). Ovipositor slightly longer than styli IX, gonapophyses with 11–12 divisions ( Fig 25 ). Cerci and caudal filament of male brouken. First basal divisions of cerci with 1 + 1 preserved inner pegs. Basal divisions of female cerci with 2–6, caudal filament with 1–4 trichobothriae.

ETIMOLOGY. The new species is named after I. Belousov (VIZR), one of the collectors of this species.

Figures

Figs 1–8. Allobrinckina belousovi Kaplin, sp. n., holotype ♂: 1 – head capsule with

Figs 9–15. Allobrinckina belousovi Kaplin, sp. n., holotype ♂ (9–11, 13, 15), paratype ♀

Figs 16–21. Allobrinckina belousovi Kaplin, sp. n., holotype ♂ (16–19), paratype ♀ (20):

Figs 22–25. Allobrinckina belousovi Kaplin, sp. n., holotype ♂ (22), paratype ♀ (23–25):