Cladiucha prosvirovi Sundukov, 2020

Sundukov, Yu. N., 2020, A NEW SPECIES OF THE GENUS CLADIUCHA KONOW, 1902 (HYMENOPTERA: TENTHREDINIDAE) FROM VIETNAM, Far Eastern Entomologist 407, pp. 25-28 : 26-28

Cladiucha prosvirovi Sundukov , sp. n.

http://zoobank.org/NomenclaturalActs/ 89CD2942-793C-473D-B030-DE1B7EA0E154

Figs 1–8

TYPE MATERIAL. Holotype – ♀, North Vietnam: Lao Cai Province, near Sa Pa Town ,

Cat Cat River, h~ 1320 m, 22.33399 o N, 103.82281 o E, 24.IV 2013, A. Prosvirov leg.

DESCRIPTION. Female ( Fig. 1 ). Length of body 18.5 mm.

Colour. Black, with intense violet-blue metallic lustre. Mandibles dark brown-reddish;

labrum pale brown; clypeus with pale whitish spot in the center; labial palp brown; basal segments of maxillary palp brown, 4-5th segments whitish, apical segment gray; 1-4th basal antennomeres with weak greenish metallic luster, other segments black; six apical antennomeres ventrally whitish. Cenchri gray. On fore legs, dorsal surface of apical 3/4 of femur, tibia (except for brown ventral surface) and tarsi whitish; claws light brown. On middle legs, long spot on dorsal surface of femur, tibia (except for brown ventral surface and apical spurs) and tarsi whitish; claws light brown. On hind legs, lateral side of coxa with whitish spot, dorsal surface of basal half of femur whitish, tibiae and tarsi purple, only basal

1/5 tibia whitish-brown and apical segment of tarsi brownish-white; claws light brown.

Cercus and ventral margin of sheat brown. Wings uniformly infuscated; veins and stigma black.

Microsculpture. Head, thorax and abdomen without microsculpture, glossy.

Head ( Figs 1–3 ). With short, whitish-gray hairs; fully punctured, more densely on inter-

antennal area, frons and along lower edge. Labial palp 3-segmented, maxilla 6-segmented.

Antennae with 23 antennomeres (apical represented by two fused antennomeres), first 2x

longer than broad, second about as long as broad, third about 2.5x longer than broad, fourth to 22th antennomeres with apex slightly narrower than long; third to 21th antennomeres with short apically projecting rami, length of middle rami slightly longer than basal width of an-

tennomere; apical two antennomeres without rami; apical 6 antennomeres with pale ventral sensory areas; length 2.5x head width. Malar space very short, less than half diameter of front ocellus; distances between eye and hind ocellus, between hind ocelli, and between hind ocellus and posterior margin of head as 1.3: 0.9: 1.5; postocellar area moderately convex,

about 1.3x broader than long.

Thorax ( Figs 1, 6, 7, 8 ). Shiny, with short, whitish-gray hairs, rather densely punctate;

upper half of mesepisternum densely punctate, lower half impunctate. Forewing with vein

2A+3A basal to the anal cross vein not complete, partially atrophied at apex. Hindwing with open cell M; anal cell with long petiole. Tarsal claw with long inner tooth, longer and stouter than outer tooth. Hind basitarsus about 6.0x longer than broad. Pulvilli on hind tarsomeres

1–4, all the same size.

frontal view; 3 – right antenna; 4 – apex abdomen, lateral view; 5 – lancet, lateral view; 6 –

thorax, lateral view; 7 – thorax, ventral view; 8 – apex of hind tarsus.

Abdomen ( Figs 1, 4, 5 ). Shiny, with sparse very short whitish-gray hairs. Sheath uniformly slender in dorsal view; straight above and rounded at apex and below in lateral view; lengths of sheath: hind tarsi: metabasitarsus = 8: 13.5: 6. Cercus about 5.0x longer than broad, 3/4

length of sawsheath. Lancet relatively short, arched in lateral view, with about 30 serrulae;

serrulae flat, medium with 10–12 subbasal teeth, serrulae indistinct at apex.

Male. Unknown.

DISTRIBUTION. Vietnam (Lao Cai Province).

HOSTS. Unknown.

REMARKS. New species is most similar to Cladiucha megatheca but latter is charac-

terized by a smaller body (15–16 mm), cell M in the hind wing is closed, and hind legs are completely black (Wei, 2010). Vietnamese C. insolita differs from the new species in the following characters: clypeus and hind tarsus black; thorax almost impunctate; upper half of mesepisternum impunctate; serrulae with 4–5 subbasal teeth; first tergite, center and apical margin of apical tergite with white spots; 1st and 2nd antennomeres about as long as broad

(Smith, 2017).

ETYMOLOGY. Named for Dr. Alexander S. Prosvirov, Lomonosov Moscow State University (Moscow, Russia), who collected this species and brought it to my attention .

Figures

Figs 1–8. Cladiucha prosvirovi sp. n., holotype, female. 1 – body, dorsal view; 2 – head,