Macrosiphoniella madeirensis Aguiar & Ilharco

Franquinho Aguiar, A. M. & Ilharco, Fernando Albano, 2005, Macrosiphoniella madeirensis Aguiar & Ilharco sp. nov. (Hemiptera: Sternorrhyncha: Aphididae) from Madeira Island, Zootaxa 867, pp. 1-12 : 1-7

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, siphunculi, 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 plates; 8th abdominal tergite with a transverse black band. Frontal tubercles of head little 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; processus 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 stiletto­shaped, 0.19–0.22 mm long, with apex distinctly rostrate, 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 segment VI. Secondary hairs of apical rostral segment 5–7 in number, rarely 4 or 8, the longest 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 reticulation 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. Marginal 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 variable 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 segment 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– 0.19 times as long as body and 1.03–1.33 times as long as cauda. Cauda 0.29–0.37 mm long, slender, 2.42–3.08 times as long as its basal width and 1.38–1.68 times as long as 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 samples: (1) S. Vicente, Boaventura, Vereda da Entrosa ( Fig. 4 ), 12.II.2000, col. A.M.F. Aguiar, 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.

Nos. 1–3, from sample A716. Nos. 4–21, from sample 6457. No. 20, holotype. A.r.s. — apical rostral segment. 2nd j.h.t. — 2nd joint of tarsus. Siph. — siphunculus. Sec. rhin. — secondary rhinaria.

No. Body Antennae A.r.s. 2nd Siph. Cauda Caudal Sec. rhin. IV

j.h.t. hairs III III IV V VI Total

Nos. 1–10, from sample 6457. A.r.s. — apical rostral segment. 2nd j.h.t. — 2nd joint of hind tarsus. Siph. — siphunculus. Sec. rhin. — secondary rhinaria

The holotype is specimen no. 20 of the type series (an apterous viviparous female on slide 6) ( Table 1 ). It is kept in the Aphid Collection of Estação Agronómica Nacional (CAEAN). Paratypes on slides are kept also in CAEAN and in Insect Collection of Laboratório Agrícola da Madeira (ICLAM). Paratypes within alcohol will be sent to the aphid collections of The Natural History Museum (Dr. Paul Brown), London, England; the Museum National d’Histoire Naturelle (Dr. G. Remaudière), Paris, France; the University of León (Dr. J. M. Nieto Nafria), León, Spain; and the Università degli Studi de Catania (Dr. S. Barbagallo), Sicily, Italy.

The specific name madeirensis is preferred to maderensis according to the International Code of Zoological Nomenclature (1985), Appendix C (Latinization of geographical and proper names): “The geographical and proper names of nations that employ the Latin characters should be written with the orthography of the country in which they originate”

Figures

FIGURE 1 — Macrosiphoniella madeirensis sp. nov.: apterous viviparous female (bar = 0.71 mm).

FIGURE 2 — Macrosiphoniella madeirensis sp. nov.: habitus of living apterous females.

FIGURE 3 — Macrosiphoniella madeirensis sp. nov.: alate viviparous female (bar = 0.79 mm).

FIGURE 4 — Typical habitat of Macrosiphoniella madeirensis sp. nov. and of its host plant Helichrysum melaleucum, on the North coast of Madeira (photo by Paulo Abreu).

Tables

TABLE 1. Measurements of Macrosiphoniella madeirensis sp. nov. apterous viviparous females (mm).

No. 1	Body 2.25	III 0.61	IV 0.43	Antennae V VI 0.34 0.14+0.56	Total 2.25	A.r.s. 0.21	2nd j.h.t. 0.14	Siph. 0.40	Cauda 0.38	Caudal hairs 23	Sec. rhin. III 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

TABLE 2. Measurements of Macrosiphoniella madeirensis sp. nov. alate viviparous females (mm).

1	2.56	0.81 0.54 0.43	0.15+ ­	­	0.22	0.14	0.43	0.35	20	69 & 74	0 & ­
2	2.28	0.75 ­ ­	­	­	0.21	0.14	0.35	0.34	16	74 & 69	­ ­
3	2.48	0.73 0.48 0.34	0.14+0.60	2.43	0.20	0.13	0.35	0.29	15	67 & 60	0 & 0
4	2.38	0.79 0.50 0.38	0.15+ ­	­	0.22	0.14	0.45	0.36	18	66 & 71	­ & 0
5	2.29	0.72 0.46 0.34	0.12+0.56	2.38	0.19	­	0.37	0.31	17	73 & 70	0 & 2
6	2.33	0.74 0.45 0.36	0.14+0.63	2.50	0.19	0.14	0.40	0.30	17	75 & 76	0 & 0
7	2.21	0.74 0.45 0.36	0.14+0.58	2.41	0.21	0.14	0.38	0.29	18	82 & 77	0 & 0
8	2.60	0.76 0.53 0.38	0.15+0.57	2.54	0.21	0.14	0.41	0.34	17	78 & 72	1 & 3
9	2.68	0.85 0.54 0.41	0.15+0.63	2.69	0.22	0.14	0.45	0.37	22	75 & 77	0 & 2
10	2.70	0.82 0.50 0.38	­	­	0.22	0.14	0.43	0.36	16	80 & 69	3 & 2