Tamalia milleri, Kanturski, Mariusz & Wieczorek, Karina, 2015

Kanturski, Mariusz & Wieczorek, Karina, 2015, A new species of the nearctic gall-forming genus Ta ma l i a Baker (Hemiptera: Aphididae: Tamaliinae), Zootaxa 3926 (2), pp. 268-278 : 269-274

Tamalia milleri sp. nov.

( Figs. 1–5; Tables 1–2 )

Material examined. Types. Holotype—USA, California, Mendocino, Anchor Bay, 16.VIII.1966, A. columbiana BM 1984-340-1, Gutierrez and Lagace leg.—1 apterous viviparous female ( BMNH).

Paratypes from the locus typicus—the same data as holotype: BM 1984-340-2—1 apterous viviparous female; BM 1984-340-3—1 apterous viviparous female ( BMNH); BM 1984-340-4—1 apterous viviparous female ( UŚ).

The holotype and paratypes from locus typicus are on separate slides.

Other paratypes—USA, Oregon, Port Orford, 20.VIII.1966, Arctostaphylos sp. BM 1984-340-5, Gutierrez and Lagace leg.—3 apterous viviparous females marked as 1, 2, 3; 2 alate oviparous females marked as 3, 4 ( BMNH); USA, Oregon, Port Orford, 20.VIII.1966, Arctostaphylos sp. BM 1984-340-6, Gutierrez and Lagace leg.—1 alate oviparous female on separate slide ( BMNH).

The type material is deposited in the Natural History Museum London, UK ( BMNH). One paratype will also be deposited in the aphid collection of the Department of Zoology, University of Silesia, Katowice, Poland ( UŚ).

Description. Apterous viviparous female. (7 specimens). Color in life unknown. Pigmentation of mounted specimens: brown. Head and pronotum brown to dark brown, covered by sclerotic shield. ANT brown. Thoracic segments II and III sclerotized with brown cross-bands on entire width or plates. Legs brown to dark brown with darker proximal part of tibiae (when legs dark brown knee areas almost black). Abdomen with transverse spinopleural cross-bands and numerous small brown marginal sclerites and scleroites. Siphuncular sclerites, subgenital plate and cauda brown. Body ovoid, widest midway between anterior and posterior ends, covered by numerous small pointed spicules ( Fig. 1). Eyes reduced to the triommatidium. HW 0.87–1.01 times ANT. Frons almost flat. Head and pronotum covered by numerous fine and pointed setae 0.047–0.11 mm long, not forming discrete groups. ANT 5-segmented ( Fig. 2 a), 0.18–0.21 times BL. ANT III ( Fig. 2 b) narrower at base and wider at the apex, shorter than ANT V. ANT IV ( Fig. 2 b) very short, also narrower at base with one rounded primary rhinarium with sclerotic rosette. ANT V widest in half of length with one big, rounded major rhinarium with sclerotic rosette and 4–5 small accessory rhinaria. PT 0.47–0.52 times BASE ( Fig. 2 c). Other antennal ratios: V:III 1.18–1.45, IV:III 0.47–0.72. Antennal chaetotaxy: ANT I with 6–8 setae, ANT II with 7–11 setae, ANT III with 10–14 setae, ANT IV with 5–9 setae, ANT V with 12–16 basal and 5 apical setae. Antennal setae long and pointed; LS ANT III 1.48–1.80 times BD III. Rostrum reaching between middle and hind coxae. ARS long, subcylindrical with rounded apex, with 22–24 accessory setae ( Fig. 2 d), 1.71–2.05 times ANT III and 1.85–1.95 times HT II. HT I with 2 long and pointed ventral setae ( Fig. 2 e). HT II 0.90–1.08 ANT III and 0.68–0.80 times ANT V. Thoracic setae pointed, 0.052–0.10 mm long. Abdomen with sclerotization on dorsal and ventral side. Abdominal tergites with dark spinal or spinopleural cross-bands, sclerites and scleroites on entire surface ( Figs. 1, 3 c). Dorsal side of abdomen covered by numerous, fine and pointed setae 0.05–0.1 mm long and small spicules ( Fig. 3 a). Abdominal sternites with wide, longitudinal transverse and paler cross-bands and shorter and fine setae. Siphunculi very low, almost poriform, located on circular sclerites ( Fig. 3 b). Cauda broadly rounded with 12–14 pointed setae. Subgenital plate well developed, sclerotized with fine and pointed setae.

Description. Alate oviparous female. (3 specimens). Color in life unknown. Pigmentation of mounted specimens: pale brown to brown. Head, ANT and thorax brown. Legs light brown with slightly darker proximal part of tibiae. Membrane of fore wings pale. Fore wings veins light brown, pterostigma pale brown. Abdomen with pale brown transverse spino-pleural cross-bands. Siphuncular sclerites, areas of wax glands, subgenital plate and cauda light brown. Body ovoid, slightly elongate ( Fig. 4 ). Head with large compound eyes and 3 well-developed ocelli. HW 0.46–0.48 times ANT. Frons flat. Head and pronotum covered by many fine and pointed setae, 0.015–0.022 mm long, not forming discrete groups. ANT 6-segmented ( Fig. 5 a), 0.40–0.44 times BL, covered by transverse rows of very short spinules. ANT III longest, strongly constricted at base with 9–12 transverse, oblate, oval secondary rhinaria with delicate sclerotic rosette ( Fig. 5 b). ANT IV as long as, or longer than ANT V with 1–2 transverse rhinaria. ANT V shorter than ANT VI with 1 oval primary rhinarium with sclerotic rosette ( Fig. 5 c). PT 0.40–0.43 times BASE ( Fig. 5 c). BASE with 1 large oval or rounded major rhinarium with sclerotic rosette and 4- 5 small accessory rhinaria. Other antennal ratios: VI:III 0.56–0.63,V:III 0.50, IV:III 0.55–0.58. Antennal chaetotaxy: ANT I with 9–13 setae, ANT II with 8–12 setae, ANT III with 28–34 setae, ANT IV with 13–15 setae, ANT V with 13–15 setae, ANT VI with 13–15 basal and 5–6 apical setae. Antennal setae short and pointed; LS ANT III 1.23–1.66 BD III. Rostrum reaching mesosternum. ARS long and thin, with rounded apex, and with 28–30 accessory setae ( Fig. 5 d), 0.66–0.75 times ANT III and 1.04–1.22 times HT II. Media of fore wings with 2 branches ( Fig. 5 e). Hind wings with 2 oblique veins. Hind tibiae not swollen, without pseudosensoria, densely covered by transverse rows of very small spinules. HT I with 2 dorsal and 6 ventral long and pointed setae ( Fig. 5 f, g). HT II 0.31–0.41 ANT III and 0.58–0.70 times ANT V. Abdomen pale with pale brown spino-pleural crossbands, sclerites, scleroites of variable length and small marginal sclerites. Siphunculi low, placed on large, rounded sclerites with numerous setae. Abdominal segments covered regularly by slightly capito-flabellate setae, 0.02–0.04 mm long. Ventral side of abdominal segments V-VII with two big, rectangular areas of wax glands in form of ring of smaller facets around a larger central area. Cauda broadly rounded with 18–22 pointed setae. Subgenital plate well developed, sclerotized, with fine and pointed setae.

Etymology. The authors have the pleasure to name the new species to honour Dr Donald G. Miller III, the genus Tamalia specialist from the Department of Biological Sciences, California State University, Chico, USA.

Diagnosis. Among species of the genus Tamalia so far known, T. dicksoni and T. milleri sp. nov. are characterized by the ARS no shorter than 0.15 mm long, with more than 18 accessory setae. The new species can be distinguished from T. dicksoni by having two setae on HT I, small dorsal spicules 0.002–0.005 mm long, and an unevenly sclerotized abdomen, with transverse cross-bands. Detailed differences between T. dicksoni and T. milleri sp. nov. (apterous viviparous females and embryos; oviparous females of T. dicksoni are unknown), are given in Table 3 .

Distribution. USA: California (Mendocino County-Anchor Bay—locus typicus), Oregon (Port Orford). Biology and host plant. Arctostaphylos columbiana Piper.

Figures

FIGURE 2. Tamalia milleri sp. nov. apterous viviparous female: a—antenna, b—antennal segments III and IV, c—antennal segment V, d—apical rostrum segment, e—hind tarsus.

FIGURE 3. Tamalia milleri sp. nov. apterous viviparous female: a—dorsal spicules, b—siphunculus, c—end of abdomen.

FIGURE 4. Tamalia milleri sp. nov. alate oviparous female—general view.

FIGURE 5. Tamalia milleri sp. nov. alate oviparous female: a—antenna, b—antennal segment III, c—antennal segments V and VI, d—apical rostrum segment, e—fore wing, f—hind tarsus with HT I chaetotaxy (photo), g—hind tarsus with HT I chaetotaxy (line drawing).

Tables

TABLE 3. The main morphological and biometric differences among apterous viviparous females of Tamalia dicksoni and T. milleri sp. nov.

Character	T. dicksoni	T. milleri sp. nov.
Abdominal sclerotization	abdomen uniformly covered by yellow sclerotic shield	sclerotization in form of dark brown dorsal and ventral cross-bands
Head dorsal setae	0.050–0.087 mm long	0.047–0.110 mm long
Metanotum dorsal setae	0.062–0.082 mm long	0.052–0.100 mm long
Dorsal spicules	0.012–0.018 mm long, thick with slightly rounded apices	0.002–0.005 mm long, thin with pointed apices
HT I ventral setae	4, not longer than HT I length	2, longer than HT I length
Number of accessory rhinaria on BASE	6–7	4–5
ANT I setae	3–5	6–8
PT/BASE	0.33–0.40	0.47–0.52
ARS/ANT III	1.42–1.57	1.71–2.05
ARS/ANT V	1.25–1.30	1.34–1.53
LS ANT III/BD III	1.94–2.17	1.48–1.80
Hind legs length	0.75–0.80 mm long	0.85–0.90 mm long
Embryonic setae	thin, pointed	thick, capitate