Paracoccus leucadendri Mazzeo & Franco

Mazzeo, Gaetana, Franco, José Carlos & Russo, Agatino, 2009, A new Paracoccus species from Palaearctic region (Hemiptera, Sternorrhyncha, Coccoidea, Pseudococcidae), Zootaxa 2274, pp. 62-68 : 63-65

Paracoccus leucadendri Mazzeo & Franco sp. nov. ( Fig. 1 )

Diagnosis. Specimens preserved in alcohol and acetic acid appeared pink in colour, becoming green in KOH. Adult female

Mounted material: Body oval, largest specimen 2.48 mm long and 1.68 mm wide. Anal lobes moderately developed, each ventral surface with an apical seta 185–210 Μm long; anal lobe bar about 35.5 Μm long and bar seta about 38 Μm long. Antennae each 350–400 Μm long, with 8 segments. Legs well developed; hind trochanter + femur 230–270 Μm long, hind tibia + tarsus 250–445 Μm long, claw about 25 Μm long. Ratio of lengths of hind tibia + tarsus to hind trochanter + femur 1.09–1.71. Translucent pores present on hind coxa and tibia.

Labium 130–145 Μm long, similar in length to clypeolabral shield. Circulus absent. Ostioles well developed, each lip with 2 or 3 setae and about 11 trilocular pores. Anal ring about 67.5 Μm long and 82.5 Μm wide, bearing 6 setae, each 125–170 Μm long.

Cerarii numbering 17 pairs; each anal lobe cerarius lightly sclerotised, with 2 conical setae, each about 17.5–27.5 Μm long and 5 Μm wide, plus 2–4 auxiliary setae and 14–21 trilocular pores. Anterior cerarii each with 2 conical setae and 4–8 trilocular pores, sometimes reduced on head to a single conical seta; preocular cerarius sometimes with 3 conical setae.

Dorsal surface with short, stiff setose setae, each mostly 5.0–12.5 Μm long. Multilocular disc pores absent. Trilocular pores evenly distributed. Oral rim tubular ducts, each about 10–12.5 Μm long, with rim about 7.5– 11.25 Μm in diameter, present singly near all abdominal cerarii (except anal lobe cerarius) and also near most thoracic cerarii; one duct also present behind each frontal cerarius; a few others distributed singly on medial areas of abdomen from segment VI to II and scattered on thorax.

Ventral surface with normal flagellate setae. Multilocular disc pores, each about 7.5 Μm in diameter, present posterior to vulva and in double rows across abdominal segments VII & VI and in single rows on segments V & IV; also with about 4–20 multilocular disc pores scattered on thorax and head.

Oral collar tubular ducts together with multilocular disc pores present in rows on abdominal segments and in a group lateral to each anterior coxa.

Type material. HOLOTYPE: adult female, Portugal, Zambujeira do Mar (Odemira), on Leucadendron cv. Rosette ( L. laureolum × L. elimense ssp. salterii) ( Proteaceae ), 15 November 2007, J.C. Franco, slide n. 1296.01 (DISTEF); PARATYPES: 9 adult females, Portugal, same data as for holotype, slides n. 1296.02 – 1296.08 (DISTEF) plus slides n. 1296.09 and 1296.10 ( DPPF).

Etymology. The epithet “ leucadendri ” is the Latin genitive of the genus name of the plant host, Leucadendron .

Comments. Paracoccus leucadendri sp. nov. lacks a circulus and has, like many other species of Paracoccus , a group of oral collar tubular ducts in the lateral area near to each anterior coxa. It is close to the following species of Paracoccus : P. claudus De Lotto , P. evae Williams, P. h e r re n i Williams & Granara de Willink, P. invectus Williams and P. o r s o m i Mamet. It differs from these as follows:

from P. claudus (only known from Namibia, West Africa on Calicorema ( Amaranthaceae )) in possessing multilocular disc pores on the venter of the thorax and in having oral rim tubular ducts in the median area of dorsum of the thorax (absent in P. claudus );

from P. e v a e (only known from Indonesia off Asteraceae and Poaceae ) in the large number and distribution of oral rim tubular ducts (very few on P. e v a e), and in having 8-segmented antennae (P. e v a e has 7-segmented antennae);

from P. h e r re n i (restricted to the Neotropics and only known on Euphorbiaceae and Verbenaceae ) in lacking both a circulus and oral rim tubular ducts ventrally (both present in P. herreni );

from P. invectus (only known from India and Thailand off Orchidaceae ) in having 17 pairs of cerarii ( P. invectus has 9–14 cerarii), ostioles with lips well developed (often indistinct in P. invectus ), in the distribution of multilocular disc pores and oral collar tubular ducts and in lacking circulus (present or absent in P. invectus );

from P. o r s o m i (only known from Madagascar off an unknown plant) in possessing oral rim tubular ducts on the thorax (absent on P. o r s o m i) and in lacking translucent pores on femur (present on P. o r s o m i).

Figures

FIGURE 1. Paracoccus leucadendri Mazzeo & Franco sp. nov. a, d: oral rim tubular duct; b: trilocular duct; c: cerarian setae; e: anal lobe cerarius; f: anal lobe bar and seta; g, j: oral collar ducts; h, i: multilocular disc pores.