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Zootaxa, Hemiptera, Sternorrhyncha, Aphididae, Macrosiphoniella

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Zootaxa, Hemiptera, Sternorrhyncha, Aphididae, Macrosiphoniella Zootaxa 867: 1–12 (2005) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ ZOOTAXA 867 Copyright © 2005 Magnolia Press ISSN 1175-5334 (online edition) Macrosiphoniella madeirensis Aguiar & Ilharco sp. nov. (Hemiptera: Sternorrhyncha: Aphididae) from Madeira Island A. M. FRANQUINHO AGUIAR1 & FERNANDO ALBANO ILHARCO2 1Laboratório Agrícola da Madeira, Estrada Engº Abel Vieira, 9135-260 CAMACHA, Madeira, Portugal. E-mail: [email protected] 2Departamento de Protecção de Plantas, Entomologia, Estação Agronómica Nacional, 2784-505 OEIRAS, Portugal Abstract A new species of the aphid genus Macrosiphoniella del Guercio (M. madeirensis sp. nov.) is described from material collected on Helichrysum melaleucum in Madeira Island. Macrosipho- niella helichrysi Remaudière is redescribed. Key words: Aphids, Madeira Island, Macrosiphoniella, new species, Helichrysum melaleucum Introduction The new species Macrosiphoniella madeirensis is similar to M. helichrysi Remaudière, from which however it can easily be separated if one uses the original description by Remaudière (1952). As M. helichrysi from Portugal is somewhat different from the speci- mens of France described by Remaudière (1952), we studied also material from Spain and from Italy. The Macrosiphoniella from Madeira Island is a new species, which we describe here. For comparison, we also redescribe M. helichrysi Macrosiphoniella madeirensis Aguiar & Ilharco, sp. nov. Apterous viviparous female (Fig. 1). Measurements from 33 specimens (Table 1). Body 1.95–2.87 mm long, with head, antennae, rostrum, pronotum, mesonotum, legs, siphun- culi, and cauda black. Abdominal dorsum membranous, with pairs of marginal, pleural, spinal, and antesiphuncular black sclerites; spinal sclerites on 2nd, 3rd, and 4th tergites usually larger than the others and those on 3rd and 4th tergites often fused into two larger Accepted by C. Schaefer: 16 Feb 2005; published: 25 Feb. 2005 1 ZOOTAXA plates; 8th abdominal tergite with a transverse black band. Frontal tubercles of head little 867 developed. Antennae 2.06–2.51 mm long, 0.82–1.06 times as long as body; III antennal segment 0.58–0.73 mm long, with 19–46 secondary rhinaria irregularly scattered on the 0.5–0.7 basal part of the segment; IV antennal segment 0.39–0.52 mm long and 1.22–1.45 times as long as V, this 0.29–0.38 mm long; base of VI segment 0.12–0.15 mm long; pro- cessus terminalis 0.49–0.60 mm long, 3.47–4.38 times as long as base of VI and 0.74–0.95 times as long as III. Primary rhinaria ciliate. Rostrum long, reaching to abdominal sternites 3–4. Apical rostral segment stiletto-shaped, 0.19–0.22 mm long, with apex distinctly ros- trate, 3.80–5.25 times as long as its basal width, 1.43–1.75 times as long as 2nd joint of hind tarsus (this 0.12–0.15 mm long) and 1.33–1.69 times as long as base of antennal seg- ment VI. Secondary hairs of apical rostral segment 5–7 in number, rarely 4 or 8, the long- est 47–70 µm; primary hairs placed on apical third of segment, being two pairs near apical rostrate part and one pair distally placed, sometimes between middle and apical third of segment. Siphunculi tapering, without basal constriction, 0.33–0.49 mm long, with reticu- lation on apical 55–65%, 0.15–0.20 times as long as body and 0.94–1.15 times as long as cauda. Cauda elongate, 0.32–0.44 mm long, constricted at basal third, 2.53–3.33 times as long as its basal width and 1.52–2.15 times as long as the apical rostral segment. Caudal hairs 13–23. Subgenital plate with 2–4 primary hairs and 11–14 (rarely 10–15) marginal ones; sometimes with a supernumerary hair. First tarsal segments with 3, 3, 3 hairs. Mar- ginal tubercles absent. Dorsal hairs very long, acute, blunt, or slightly capitate; posterior cephalic hairs and spinal on 3rd abdominal tergite about 100–113 µm long, rarely shorter (up to 86 µm); hairs on 8th abdominal tergite 4–6 rarely 7, 93–125 µm long. Pronotum with 8–14 hairs. Tibial hairs stout, with soft apex. Antennal hairs on III segment 33–45 µm long, with soft apex. Ventral hairs shorter than dorsal ones, mostly blunt but some up to finely pointed. Color when alive: pale gray, covered with a fine whitish waxy excretion, this absent on a bright black somewhat quadrangular spot on center of abdominal dorsum and on a vari- able degree on abdominal tergites 5 to 8, especially the 6th and 8th where the siphunculus and cauda are inserted (Fig. 2). Alate viviparous female (Fig. 3). Measurements from 10 specimens (Table 2). Body 2.21–2.70 mm long. Antennae 2.38–2.69 mm long, 0.98–1.09 times as long as body; III antennal segment 0.72–0.85 mm long, with 60–82 secondary rhinaria on entire length of segment; IV antennal segment 0.45–0.54 mm long, 1.25–1.41 times as long as V, with 0–3 secondary rhinaria, when present, on basal two thirds of segment; V antennal segment 0.34–0.44 mm long, without secondary rhinaria; base of VI segment 0.12–0.15 mm long; processus terminalis 0.56–0.63 mm long, 3.80–4.67 times as long as base of VI and 0.74– 0.85 times as long as III. Apical rostral segment 1.50–1.57 times as long as 2nd joint of hind tarsus (this 0.13–0.14 mm long) and 1.36– 1.68 times as long as base of antennal seg- ment VI. Secondary hairs of apical rostral segment 6–7, rarely 8, the longest 50–60 µm. Siphunculi subcylindrical, 0.35–0.45 mm long, with reticulation on apical 53–61%, 0.14– 2 © 2005 Magnolia Press AGUIAR & ILHARCO 0.19 times as long as body and 1.03–1.33 times as long as cauda. Cauda 0.29–0.37 mm ZOOTAXA long, slender, 2.42–3.08 times as long as its basal width and 1.38–1.68 times as long as 867 apical rostral segment. Caudal hairs 15–22. Subgenital plate with 3–4 primary hairs and 9– 13 marginal ones. Posterior cephalic hairs 63–88 µm long; spinal hairs on 3rd abdominal tergite 70–106 µm long; hairs on 8th abdominal tergite 4–5, 75–97 µm long. Antennal hairs on III segment 30–38 µm long. Otherwise as in apterous viviparous female. Host plant, locality, and type depositories. Macrosiphoniella madeirensis lives on the terminal parts of the shoots and on the leaf petioles of Helichrysum melaleucum Rchb. ex. Holl, an endemic Compositae of Madeira Island. The description of M. madeirensis is based on specimens of the following two sam- ples: (1) S. Vicente, Boaventura, Vereda da Entrosa (Fig. 4), 12.II.2000, col. A.M.F. Agu- iar, register number (ICLAM) A716; (2) Santana, Arco de S. Jorge, 14.II.2001, col. A.M. F. Aguiar & J. Jesus, register numbers A744 and CAEAN 6457. FIGURE 1 — Macrosiphoniella madeirensis sp. nov.: apterous viviparous female (bar = 0.71 mm). A NEW MACROSIPHONIELLA © 2005 Magnolia Press 3 ZOOTAXA 867 FIGURE 2 — Macrosiphoniella madeirensis sp. nov.: habitus of living apterous females. FIGURE 3 — Macrosiphoniella madeirensis sp. nov.: alate viviparous female (bar = 0.79 mm). 4 © 2005 Magnolia Press AGUIAR & ILHARCO TABLE 1. Measurements of Macrosiphoniella madeirensis sp. nov. apterous viviparous females ZOOTAXA (mm). 867 No. Body Antennae A.r.s. 2nd Siph. Cauda Caudal Sec. j.h.t. hairs rhin. III IV V VI Total III 1 2.25 0.61 0.43 0.34 0.14+0.56 2.25 0.21 0.14 0.40 0.38 23 46 & 33 2 2.38 0.60 0.44 0.33 0.13+0.55 2.25 0.19 0.13 0.35 0.35 20 39 & 31 3 2.07 0.59 0.40 0.31 0.14+0.49 2.06 0.20 0.12 0.36 0.34 16 32 & 31 4 2.40 0.71 - - - - 0.22 0.15 0.45 0.42 22 43 & - 5 2.10 0.63 0.40 0.31 0.13+0.55 2.23 0.21 0.12 0.38 0.36 17 33 & 30 6 1.95 0.60 0.39 0.29 0.12+ - - 0.20 0.13 0.34 0.35 17 28 & - 7 2.87 0.68 0.48 0.35 0.15+0.54 2.36 0.22 0.14 0.47 0.41 18 38 & 32 8 2.50 0.69 0.52 0.36 0.15+0.52 2.38 0.22 - 0.45 0.44 19 34 & 37 9 2.87 0.73 0.50 0.38 0.15+0.58 2.51 - - 0.49 0.43 15 43 & 36 10 2.29 0.66 0.48 0.34 0.14+0.49 2.28 0.21 0.13 0.45 0.40 18 37 & 38 11 1.98 0.58 0.40 0.31 0.13+0.52 2.10 0.21 - 0.33 0.32 19 - & 34 12 2.63 0.64 0.44 0.36 0.15+ - - 0.22 0.14 0.42 0.40 - - & 32 13 2.45 0.63 - - - - 0.21 0.14 0.40 0.37 17 26 & 19 14 2.59 0.65 0.44 0.35 0.15+0.53 2.28 0.20 0.14 0.40 0.37 16 41 & 34 15 - 0.65 0.43 0.35 0.13+0.57 2.37 0.21 0.14 0.40 0.40 13 29 & 32 16 2.50 0.69 0.45 0.36 0.14+0.55 2.38 0.21 0.13 0.43 0.40 19 33 & 38 17 2.75 0.66 0.47 0.35 0.13+0.55 2.35 0.21 0.14 0.45 0.41 17 38 & 35 18 2.44 0.61 0.45 0.31 0.14+0.58 2.28 0.20 0.14 0.42 0.43 20 38 & 33 19 2.50 0.66 0.46 0.36 0.14+0.56 2.38 0.21 0.14 0.43 0.42 14 34 & - 20 2.63 0.66 0.45 0.36 0.14+0.60 2.35 0.22 0.14 0.43 0.38 17 37 & 39 21 2.25 0.58 0.39 0.30 0.13+0.54 2.09 0.20 0.13 0.33 0.35 17 24 & 28 Nos.
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