Coryphophthalmus morulus 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 : 3-7

Coryphophthalmus morulus Kaplin , sp. n.

http://zoobank.org/NomenclaturalActs/ D4EB0EE3-D286-4093-A61A-B7CF0D8 AD 322

Figs 1–17

MATERIAL. Holotype – ♂, Russia: North Ossetia-Alania, environs of Koban ,

42°55'10''N, 44°29'41''E, 1300 m, 03.V 2019, leg. V. Kaplin, L. Kiseleva, O. Kozhevnikova ( VIZR) (in slides). Paratypes – 7 ♂, 8 ♀, same locality, data and leg., as for holotype ( VIZR) (1 ♂ and 1 ♀ in slides; 6 ♂, 7 ♀ in 75% ethanol) .

DESCRIPTION. Body length: male 6.1–6.5 mm, female 6.4–6.8 mm. Body width: male and female 1.5–1.7 mm. General body color whitish or light yellowish,

with hypodermal pigment. Antennal base, occiput, frons, clypeus, maxillae,

mandibles, labrum, labium, hypopharynx, coxae of all legs, thoracic and abdominal tergites and sternites with purple-brown hypodermal pigment of weak or medium intensity. The head is most pigmented. Color of scales blackish-brown on the upper surface and brown on the lower surface of the body. They are darker in males than females. The scales form a longitudinal striped pattern on the upper part of the male body. Antennae of male and female shorter than body. Distal chains of flagellum divided into 6–10 articles in male and into five or six articles in female ( Figs 1, 2 ).

Clypeus and labrum of male with long thin bristles. Cercus approximately 0.38–0.40

(male) or 0.35 (female) body length, including about 16 articles. Apex of cercus with one lateral spike. Articles of cerci, except for apical three, with 2 or 3 colorless supporting macrochaetae on inner side. About 15–18 basal articles of caudal filament also with supporting macrochaetae on lateral sides.

Compound eyes bicolor light brown with a large light green spot in the back part of the eye near the eyes contact line (in alcohol). Ratio of diameters of green spot and eye about 0.55–0.60. Ratio of length to width of compound eye about 1.0

in both sexes; ratio of length of contact line to length of eye 0.48–0.50 (male) or

0.45–0.47 (female). Paired ocelli submedian, pear shape, dark brown with narrow white border, 1.5–1.6 times as wide as long in both sexes. Distance between inner margins of ocelli 0.20–0.22 and between their outer margins 0.60–0.65 total width of compound eye in both sexes ( Fig. 3 ).

Apical article of maxillary palp 1.06–1.08 (male) or 0.72–0.73 (female) times as long as preceding one. Dorsal surface of 7th, 6th and 5th articles of maxillary palp with 9 or 10, 7 or 8 and 4 (male) or 7 or 8, 9 and 3 (female) hyaline spines, respectively. Ventral surface of 2–5th articles of male maxillary palp with relatively numerous and long thin setae ( Fig. 4 ). Apical article of labial palp triangularly oval,

2.2 or 2,3 (male) or 2.3 or 2.4 (female) times as long as wide ( Figs 7, 8 ). Mandibles with four (female) distal teeth in both sexes ( Figs 5, 6 ).

Fore and middle femur and tibia of male and female widened ( Fig. 9 ). Fore femur of male without sensory field. Ratios of length to width of femur, tibia and tarsus as shown in Table 1. Ratio of length of 3rd tarsomere of tarsus to total length of tarsus 0.34 or 0.35 (male), 0.39 or 0.40 (female). Legs of male without long, thin bristles. Ventral surface of femora, tibiae and tarsi without spine-like chaetae in both sexes. Middle and hind legs with coxal styli. Length of styli 0.50–0.53 mm in both sexes. Ratio of length of styli to width of middle and hind coxae about 1.6 or

1.7 in female, 1.4 or 1.5 in male.

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

but abdominal segments II–IV with 2 + 2 eversible vesicles ( Figs. 12, 13 ). In male,

posterior angle of urosternites II, III–VI, VII and VIII approximately 80°, 66–68°,

71° and 90°; but in female, posterior angle of urosternites II, III–IV and V–VII about 81°, 75° and 68–74°. Ratios of lengths of stylus (without apical spine) and coxite on segments II–IX as shown in Table 2.

♀ (11, 12–14): 10 – urosternite and urocoxites (part) V; 11 – urosternite and urocoxites (part)

VII; 12 – urocoxite IX, with anterior gonapophyses; 13 – distal part of anterior gonapophyse;

14 – distal part of posterior gonapophyse; 15 – urocoxite IX, with penis and parameres; 16 –

paramere; 17 – penis. Scale bars = 0.1 mm.

Shape of urosternite V in male as shown in Fig. 10 . Inner posterior lobes of coxites VII of female protruding ( Fig. 11 ); ratio of length to total width of these lobes about 0.37. Thoracic tergites, abdominal tergites I–IV, urosternites, abdominal coxites I–V without macrochaetae; in both sexes, abdominal tergite V with 1 + 1

macrochaetae, but abdominal tergite VI–X with 2 + 2 macrochaetae. Distribution of sublateral macrochaetae on abdominal coxites VII–IX as shown in Table 3. Abdominal coxites IX with 3 + 3 inner (male) or 2 + 2 outer and 5 + 4 inner (female)

sublateral macrochaetae, respectively ( Figs 12, 15 ).

Ovipositor slender, elongate (1.1– 1.3 mm), not reaching apex of styli IX by about

0.1–0.7 length of latter ( Fig. 12 ). Anterior and posterior gonapophyses with approximately 38 or 39 articles. Two basal articles of anterior gonapophyses and about

24 basal articles of posterior gonapophyses glabrous. Apical spines of gonapophyses as long as 3.5–3.8 apical articles combined. Distal articles of anterior and posterior gonapophyses with four or five and with three or four setae, respectively (not counting sensory setae and apical spines) ( Figs 13, 14 ).

Male genitalia with one pair of parameres on abdominal segment IX. Parameres with 1 + 6 articles ( Fig. 16 ), slightly not 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 3.3–3.7 ( Fig. 15 ). Ratio lengths of basal and apical articles of penis 1.6–1.7 ( Figs 16, 17 ).

ETYMOLOGY. The new species is named after the predominant color of the body scales.

HABITATS. All specimens of Coryphophthalmus morulus sp. n. were collected in subalpine plant belt of the Caucasus (cereals, grasses, sparse woody-shrub vege-

tation ( Salix, Rosa, Prunus ), under stones, 1300 m above sea level.

DIFFERENTIAL DIAGNOSIS. Coryphophthalmus morulus sp. n. with 2 + 2

eversible vesicles on abdominal coxites II–IV belongs to the subgenus Coryphophthalmus s. str. The new species differs from other species of this subgenus by the body size, color of the compound eyes, maxillary palps, urocoxite IX. Body length of C. morulus sp. n. 6.1–6.5 mm, other species of this subgenus 7–11.5 mm. The color of the compound eyes of C. morulus sp. n. light brown with a large light green spot. The color of the compound eyes of other species of the subgenus Coryphophthalmus s. str. dark with a bluish tint, dark, black, more rarely brown with redish tint, blackish brown, brown, brownish-gray, bluish-brown with mottled pattern, blackish-dark brown with green sport, dark green. Apical article of male maxillary palp of new species longer, in other species shorter than preceding one.

Styli (not including of apical spines) relatively short. Ratio of length of stylus to urocoxite IX 0.59 (male) or 0.55 (female).

Figures

Figs 1–9. Coryphophthalmus morulus Kaplin, sp. n., holotype ♂ (2–4, 6, 8, 9), paratype ♀ (1, 5, 7): 1, 2 – distal chain of flagellum; 3 – compound eyes and paired ocelli; 4 – maxillary palpus; 5, 6 – apex of mandible; 7, 8 – labial palpus and labium (part); 9 – fore leg (part). Scale bars = 0.1 mm.

Figs 10–17. Coryphophthalmus morulus Kaplin, sp. n., holotype ♂ (10, 15–17), paratype