Brevennia larvalis Kaydan

Kaydan, Mehmet Bora, Benedicty, Zsuzsanna Konczne, Kiss, Balazs & Szita, Eva, 2016, A survey of scale insects in soil samples from Europe (Hemiptera, Coccomorpha), ZooKeys 565, pp. 1-28 : 14-18

Taxon classification Animalia Hemiptera Pseudococcidae

Brevennia larvalis Kaydan sp. n. Figs 3, 4

Material examined.

Holotype. Adult female. Albania: Qafa e Pejës, 1700 m a.s.l., 17.vii.1996, leg. Horváth E. (PPI: 12211, HNHM: E-1451). Other material examined. 5 nymphs - same data as holotype.

Description.

Adult female (Fig. 3). Body elongate oval, 1.24 mm long, 0.48 mm wide. Eye marginal, 35-40 µm wide. Antenna seven or eight segmented, 1.90 µm long; apical segment 32.5-35 µm long, 25-30 µm wide, with apical setae 22.5-27.5 µm long plus three fleshy setae, each 20-35 µm long. Tentorium 135 µm long, 120 µm wide. Labium 65 µm long, 90 µm wide. Anterior spiracles 37.5-42.5 µm long, 17.5-20.0 µm wide across atrium; posterior spiracles 45 µm long, 22.5-25.0 µm wide across atrium; each spiracle associated with 2 or 3 trilocular pores. Legs well developed; data for posterior legs: coxa 70 µm, trochanter + femur 125 µm, tibia + tarsus 135 µm, claw 17.5 µm. Ratio of lengths of tibia + tarsus to trochanter + femur 1.02-1.70:1; ratio of lengths of tibia to tarsus 1.23-1.70:1; ratio of length of hind trochanter + femur to greatest width of femur 3.45-3.80:1. Tarsal digitules each 25 µm long, hair-like. Claw digitules knobbed each 17.5 µm long. Hind tibia with 4-9 translucent pores. Anterior ostioles absent; posterior ostioles present, without pores or setae. Anal ring 60 µm wide, with six setae, each seta 55-90 µm long. Cerarii three pairs only, each slightly sclerotized; anal lobe cerarii each with two enlarged setae, 15 µm long, plus one quiquelocular pore; cerarii on abdominal segments VII and VI both with two slender enlarged setae and two or three quinquelocular pores.

Dorsum. Body setae spine-like in various sizes, each 5.0-12.5 µm long. Quinquelocular pores in rows on abdominal segments as follows: I-III 84, IV 32, V 32, VI 39, VII 34, VIII + IX 11; each pore 5-6 µm in diameter; pores scattered on head and thorax. Oral collar tubular ducts, each 7.5-10 µm long, 4-5 µm wide, in single rows across all abdominal segments: I-III 14 ducts, IV 8, V 8, VI 10, VII 9, VIII + IX 3, and also submarginal area of head and thorax, each pore 5-6 µm in diameter. Minute discoidal pores scattered throughout, each 2 µm in diameter.

Venter. Setae slender, hair-like, each 10-35 µm long, longest setae medially on head. Apical setae of anal lobe each 110-120 µm long. Multilocular disc pores absent. Quinquelocular pores each 5-6 µm in diameter; in rows on abdominal segments as follows: II-III 74, IV 36, V 45, VI 39, VII 50, VIII + IX 34; and scattered on head and thorax. Minute discoidal pores few, each 2 µm in diameter, scattered throughout. Oral collar tubular ducts concentrated on body margin of abdominal segments, of one size, each 4-5 µm long, 7.5-10 µm wide, and on margin of head, thorax and abdominal segments, as follows: II-III 30 ducts, IV 12, V 10, VI 9, VII 4, VIII + IX.

Comments.

Brevennia larvalis sp. n. Kaydan can be readily distinguished by: (i) absence of multilocular pores; (ii) absence of pores and setae on the lips of ostioles; and (iii) in having three pairs of cerarii. There is no other species in the genus without multilocular pores.

First-instar nymph (Fig. 4). Body elongate oval, 0.51-0.56 mm long, 0.20-0.22 mm wide. Eye marginal, 35-40 µm wide. Antenna six-segmented, 1.30-1.90 µm long; apical segment 45-52.5 µm long, 22.5-27.5 µm wide, with apical setae 22.5- 27.5 µm long plus three fleshy setae, each 15-17.5 µm long. Tentorium 80 µm long, 75 µm wide. Labium 40-45 µm long, 52.5 µm wide. Anterior spiracles 22.5-25 µm long, 7.5 µm wide across atrium; posterior spiracles 22.5-25 µm long, 7.5 µm wide across atrium. Legs well developed; data for posterior legs: coxa 37.5-42.5 µm, trochanter + femur 75.0-82.5 µm, tibia + tarsus 92.5-95 µm, claw 12.5-15.0 µm. Ratio of lengths of tibia + tarsus to trochanter + femur 1.02-1.70:1; ratio of lengths of tibia to tarsus 1.23-1.70:1; ratio of length of hind trochanter + femur to greatest width of femur 3.45-3.80:1. Tarsal digitules each 15-20 µm long, hair-like. Claw digitules knobbed each 12.5-15 µm long. Anterior ostioles absent; posterior ostioles present with only one trilocular pore 2.5-3.0 µm in diameter. Anal ring 42.5 µm wide, with six setae, each seta 40 µm long. Cerarii two pairs only; anal lobe cerarii each with two enlarged setae, 15-25 µm long, cerarius on abdominal segment VII with two slender enlarged setae.

Dorsum. Body setae spinelike of various sizes, each 5.0-12.5 µm long. Quinquelocular pores in four longitudinal rows, each pore 5-6 µm in diameter.

Venter. Setae slender and hair-like, each 15-25 µm long, longest setae medially on head. Apical setae of anal lobe each 42.5-85.0 µm long. Quinquelocular pores in four longitudinal rows, each pore 5-6 µm in diameter.

Etymology.

This species is named because of absence of multilocular pores on venter and dorsum, which is a character of larval (nymphal) stages.

Host plants.

Unknown.

Distribution.

Albania.