Coryphophthalmus tskhinvalicus Kaplin, 2020

Kaplin, V. G., Kiseleva, L. V. & Kozhevnikova, O. P., 2020, NEW SPECIES OF BRISTRLETAILS OF THE GENUS CORYPHOPHTHALMUS VERHOEFF, 1910 (ARCHAEOGNATHA: MACHILIDAE) FROM NORTH AND SOUTH OSSETIA, Far Eastern Entomologist 406, pp. 1-13 : 7-12

Coryphophthalmus tskhinvalicus Kaplin , sp. n.

http://zoobank.org/NomenclaturalActs/ 09E4D918-6C5A-4371-876C-DBF788AA9A37

Figs 18–28

MATERIAL. Holotype – ♂, South Ossetia: environs of Tskhinval , 42°13'32''N,

43°58'12''E, 880 m, 30.IV 2019, leg. V. Kaplin ( VIZR) (in slides). Paratypes – 8 ♂ ,

5 ♀, same locality, data and leg., as for holotype ( VIZR) (1 ♀ in slides; 8 ♂, 4 ♀ in

75% ethanol).

paratype ♀ (21): 18 – front of the head (vertex, compound eyes, paired ocelli, frons, antennae bases, median ocellus, clypeus, labrum); 19 – maxillary palpus; 20, 21 – labial palpus and labium (part); 22 – apex of mandible; 23 – part of fore leg (tarsus, tibia, femur and trochanter), 24 – pronotum. Scale bars = 0.1 mm.

DESCRIPTION. Body length: male 6.8–8.0 mm, female 7.1–8.5 mm. Body width: male and female 1.8–2.2 mm. General body color whitish, almost without hypodermal pigment. Antennal base, frons, lateral parts of clypeus, maxillae,

mandibles, coxae of all legs, the base of cerci, caudal filament with purple-brown hypodermal pigment of weak or medium intensity ( Fig. 18 ). Color of scales brown.

(26–28): 25 – urocoxite IX, with penis and parameres; 26 – urocoxite IX, with posterior gonapophyses; 27 – distal part of anterior gonapophyse; 28 – distal part of posterior gonapophyse. Scale bars = 0.1 mm.

Antennae of male and female shorter than body. Distal chains of flagellum divided into 10–12 articles in male and into 7–11 articles in female. Clypeus of male withоut long thin bristles. Cercus approximately 0.36–0.38 body length in male and female,

including about 18 articles. Apex of cercus with one lateral spike. Articles of cerci,

except for apical one, with 1–3 colorless supporting macrochaetae on inner side.

Caudal filament also with supporting macrochaetae.

Compound eyes black (in alcohol). Ratio of length to width of compound eye

1.06–1.08; ratio of length of contact line to length of eye about 0.48 in both sexes.

Paired ocelli submedian, pear shape, reddish-brown with narrow white border, 1.4–

1.6 times as wide as long in both sexes. Distance between inner margins of ocelli

0.16 or 0.17 and between their outer margins 0.66 or 0.67 total width of compound eye in both sexes ( Fig. 18 ).

Apical article of maxillary palp 0.81–0.83 (male) or about 0.90 (female) times as long as preceding one. Dorsal surface of 7th, 6th and 5th articles of maxillary palp with 11, 11 or 12 and 3 or 4 hyaline spines in both sexes, respectively ( Fig.

19). Apical article of labial palp triangularly oval, about 2.6 times as long as wide in both sexes ( Figs 20, 21 ). Ventral surface of articles of maxillary palp and dorsal surface of articles of labial palp of male without relatively numerous and long thin setae. Mandibles with three distal teeth in both sexes ( Fig. 22 ).

Fore femur of male and female widened ( Fig. 23 ). Fore femur of male without sensory field. Ratios of length to width of femur, tibia and tarsus as shown in Table

4. Ratio of length of 3rd tarsomere of tarsus to total length of tarsus 0.36–0.38 in both sexes. Legs of male without long, thin bristles. Ventral surface of femora, tibiae and tarsi without relatively short, pigmented supporting spine-like chaetae in both sexes. Middle and hind legs with coxal styli. Length of styli 0.55–0.60 mm in both sexes. Ratio of length of styli to width of middle and hind coxae about 1.4 in female,

1.5 or 1.6 in male. Pronotum with a deep notch without macrochaetae ( Fig. 24 ).

In both sexes, abdominal segments I and V–VII with 1 + 1 eversible vesicles,

but abdominal segments II–IV with 2 + 2 eversible vesicles. Ratios of lengths of stylus (without apical spine) and coxite on segments II–IX as shown in Table 5.

Posterior angle of urosternites I–VIII in male and I–VII in female as shown in Table

6.

Inner posterior lobes of coxites VII of female protruding; ratio of length to total width of these lobes about 0.50. Thoracic tergites, abdominal tergites I–III, urosternites, abdominal coxites I–VI without macrochaetae in both sexes. Distribution of sublateral macrochaetae on abdominal tergites and coxites as shown in Table 6.

Abdominal coxites IX with 2 + 2 outer spines (male) and 6 + 8 (male) or 9 + 9

(female) inner spines ( Figs 25, 26 ).

Ovipositor slender, elongate (1.6– 2.2 mm), reaching apex of styli IX ( Fig. 25 ).

Anterior and posterior gonapophyses with approximately 48 articles. Two basal articles of anterior gonapophyses and about 17 or 18 basal articles of posterior gonapophyses glabrous. Apical spines of gonapophyses as long as 3.6–3.8 apical articles combined. Distal articles of anterior gonapophyses with 5–7, posterior gonapophyses with 4–7 setae (not counting sensory setae and apical spines) ( Figs 27, 28 ).

Male genitalia with one pair of parameres on abdominal segment IX. Parameres with 1 + 6 articles, reaching apex of penis. Penis and parameres significantly not attaining level of apex of coxites IX, ratio distance between apexes of penis and of coxites IX to width of apical article of penis about 5.9 ( Fig. 25 ).

ETYMOLOGY. The new species takes its name from the type locality.

HABITATS. All specimens of Coryphophthalmus tskhinvalicus sp. n. were collected collected in a pine ( Pinus sp. ) grove among the stones near the Great

Liakhvi River.

DIFFERENTIAL DIAGNOSIS. Coryphophthalmus tskhinvalicus sp. n. with 2

+ 2 eversible vesicles on abdominal coxites II–IV belongs to the subgenus Coryphophthalmus s. str. Among species of this subgenus, clypeus, maxillary palps and labial palps of males C. tskhinvalicus sp. n., as well as C. kislovodski ( Kaplin, 2010)

and C. lermontovi ( Kaplin, 2015) from Stavropol Krai without numerous long thin setae ( Kaplin, 2010, 2015). The main morphological differences between them are shown in Table 7.

Figures

Figs 18–24. Coryphophthalmus tskhinvalicus Kaplin, sp. n., holotype (18–20, 23, 24) ♂,

Figs 25–28. Coryphophthalmus tskhinvalicus Kaplin, sp. n., holotype (25) ♂, paratype ♀