Eriococcus longisetosus Foldi & Kozár, 2007

Foldi, Imre & Kozár, Ferenc, 2007, New species and new records of Eriococcus (Hemiptera, Coccoidea, Eriococcidae) from South America, Zootaxa 1573 (1), pp. 51-64 : 54-56

Eriococcus longisetosus Foldi & Kozár sp. nov.

Type material. Holotype, adult female: Brazil, Rio Grande do Sul, Itaimbézinho, Parc National de Asparados, on Annona muricata (Annonaceae) , 16-XI-1985, I. Foldi coll., (N° 10388-7) in MNHN.

ADULT FEMALE ( Fig. 2 ) described from 1 specimen.

Mounted femal e. Body outline elongate oval, 2.33 mm long, 1.37 mm wide. Antennae 7 segmented, each 238 µm long; antennal segments with few hair-like setae, longest about 29 µm; segment III without setae; segment lengths (µm): I 43, II 43, III 49, IV 43, V 24, VI 24, and VII 6; apical segment with a long seta, 58 µm, plus three sensory falcate setae, each 21–27 µm long. Frontal lobes absent. Eyes near margin on venter.

Vente r. Labium 3-segmented, 120 µm long. Legs well developed. Prothoracic legs (lengths in µm): coxa 106, trochanter + femur 256, tibia 134, tarsus 129. Mesothoracic legs (lengths in µm): coxa 96, trochanter + femur 262, tibia 144, tarsus 146. Metathoracic legs (lengths in µm): coxa 118, trochanter + femur 272, tibia 161, tarsus 140, tarsal digitules knobbed, each 59, claw 51, claw digitules each 53, slightly knobbed. Metathoracic coxae with 110–120 large translucent pores; femur with about 14–21 translucent pores dorsally at distal end; trochanter with two sensory pores on each side; claw with a denticle. Legs with few hair-like setae, trochanteral seta longest 125–130 µm, tarsus with one sensory pore.

Disc pores each with 5 loculi and 5 µm in diameter, distributed in bands on posterior 4 abdominal segments and scattered elsewhere on rest of abdomen, thorax and head. Peritremes of anterior spiracles each 43 µm wide. Long hair-like setae: longest up to about 130–135 µm long, distributed mainly on median and submedian regions; shorter setae, each 24–30 µm long, in a submarginal band. Microtubular duct absent. Macrotubular ducts of one size, each about 3–4 µm wide and 12–15 µm long, with inner ductule about 12–14 µm long: sparse throughout. Sessile pores each 4 µm wide, mostly in a sparse submarginal band, absent on last three abdominal segments. Anal lobes each with 3 hair-like setae.

Margin. Ventral marginal spinose setae similar to those on dorsum but slightly smaller, sparsely distributed along margin as follows: with a small group on head, with a total of about 7 on thoracic segments, and with 2 spinose setae on abdomen; absent from margins of posterior four abdominal segments.

Dorsum. Dorsal spinose setae each 41–76 µm long, abundant in a dense group on head, in a broad band on each thoracic segment, and in a transverse segmental band 2–3 setae wide on each abdominal segment but absent from segment VIII. Macrotubular ducts each 25 µm long and 5–6 µm wide, sparsely distributed throughout. Microtubular ducts each 5 µm long, scattered among dorsal setae and a microtubular duct present near each dorsal spinose seta. Disc pores absent. Anal ring with 8 hair-like setae, each about 128 µm long. Anal lobes about as long as wide, membranous, each with two spinose setae along outer margin and one spinose seta on inner margin, similar to those on dorsum; each apical seta on anal lobe about 210 µm long. Suranal setae hair-like. Median sclerotised plate absent.

Etymology. The species epithet is derived from the Latin longus meaning long and seta meaning bristle or hair, referring to the exceptionally long setose setae on the venter.

Distribution and Host plants. Brazil: Rio Grande do Sul, Annona muricata (Annonaceae) .

Comment: E. longisetosus differs from all other known species of Eriococcus in having abundant strong, long hair-like setae medially on venter of all segments. There are some similarities with A. perplexus ( Hempel, 1900) and A. jorgenseni ( Morrison, 1919) in the arrangement of the dorsal spines and the large number of pores on each posterior coxa (110–120). However, E. longisetosus differs from E. perplexus in the absence of frontal lobes, and in the large size of the coxal pores. It differs from E. jorgenseni in the absence of cruciform pores on the most posterior abdominal segments of the venter, and in having many fewer (0–2) ventral submarginal spinose setae (3–5 present on E. jorgenseni ).

Figures

FIGURE 2. Adult female Eriococcus longisetosus Foldi & Kozár sp. nov. Where A = dorsal macrotubular duct; B = microtubular duct: C = spinose seta; D = 5-locular pore; E = ventral macrotubular duct; F = long hair-like seta; G = metathoracic claw; H = short ventral seta; I = cruciform pore; J = antenna.