Umbonichiton bispinatus Henderson & Hodgson, 2005

Henderson, Rosa C. & Hodgson, Chris J., 2005, Two new species of Umbonichiton (Hemiptera: Sternorrhyncha: Cocccoidea: Coccidae) from New Zealand, Zootaxa 854 (1), pp. 1-11 : 5-7

Umbonichiton bispinatus Henderson & Hodgson sp. nov. ( Fig. 1 )

Unmounted material: in life, young females yellow­brown, usually changing to olive green; body shape moderately convex; test as in generic diagnosis.

Mounted material: body elongate oval with rounded ends. Size rather small, length 1.1–1.27 mm; breadth 0.65–0.75 mm; anal cleft 100–125 µm long.

Dorsum: dorsal pores distributed in a reticulate pattern as for genus; dorsal pores of 3 types as for genus except that dorsal macropores heavily sclerotised and cone­shaped, apex pointed; most abundant in median and submedian reticulation lines, rarely in median transverse lines and none associated with submarginal reticulation lines; simple pores dark and rather similar to microductules. Anal plates: length 100–105 µm, combined widths 85–88 µm; with 3–5 minute pores on upper surface of each plate; length of setae: inner margin setae1 each 8–10 µm (located about one third up inner margin), inner margin setae 2 each 10–12 µm (clearly located along inner margin), apical setae 10–12 µm, outer margin setae 10–14 µm (actually placed slightly onto dorsal surface). Anogenital fold with 4 or 5 setae along antero­lateral margins, longest seta short 20–23 µm long.

Margin: marginal setae small and finely spinose, occurring near to, or at, each reticulation point around margin (reticulation point setae), each about 10 µm long; with 6 setae between eyespots anteriorly, plus 1 or 2 between eyespots and anterior stigmatic cleft (on each side), 2 or 3 between stigmatic clefts, and 7–10 between posterior stigmatic clefts and anal cleft (on each side). Each anterior stigmatic cleft with 1 large, parallel­sided, blunt stigmatic spine, each 40–70 µm long, plus a short spine on posterior margin of each cleft, similar to but slightly larger than a marginal seta, each 8–12 µm long; each posterior stigmatic cleft lacking a large stigmatic spine, but with a short spine similar to a marginal seta but slightly larger, present on both anterior and posterior margins of each cleft; length 8– 12 µm.

Venter: pregenital disc­pores as for genus: number present mediolaterally on each side of each segment: anal cleft/ VII, 4 or 5; VI, 1–4; V –II, 1 or 2; with 0 or 1 laterad to each metacoxa. Spiracular disc­pores in narrow bands about 1–2 pores wide: with 11–15 in each anterior band and 12–19 in each posterior band. Ventral microducts rather sparse, present throughout submargin and medially except on posterior 2 abdominal segments. Ventral tubular ducts as for genus, but rather few, mostly forming a rather sparse submarginal band; with a few medially near mouthparts and occasionally near coxae. Ventral setae: ventral anal lobe setae 10–23 µm long; with 2 or 3 pairs of anterior anal cleft setae; length of longest pregenital setae 34–38 µm; number of setae present medially on each abdominal segment: VII, 8 (<10 µm long) + 1 pair of long setae laterally; VI –II, 9–13; with 9–14 medially between metacoxae plus 5 anterior to each meso­ and metacoxa and 2 or 3 posterior to each procoxa; with 3 or 4 pairs of interantennal setae (longest 25–60 µm); with 4 or 5 small submarginal setae on each side between stigmatic clefts. Preantennal pores present. Antennae 6 or 8 segmented, segment III generally divided more or less into 3 segments, intersegmental membranes sometimes obscure and (when clearly 8 seg­ mented) usually with a further small pseudoarticulation in segment V; total length 198– 225 µm, length apical seta 28–35 µm. Clypeolabral shield 105–110 µm long. Width of spiracular peritremes: anterior 20–22 µm, posterior 22–25 µm. Legs: lengths (metathoracic): coxa 83–85 µm; trochanter + femur 105–110 µm; tibia 85–90 µm; tarsus 75–78 µm; claw 10–12 µm.

Material examined: HOLOTYPE female: NEW ZEALAND, AK, Titirangi , 21 Ngaio Road, 20 Dec 2003, RC Henderson, Dacrydium cupressinum , tree by house at back, leaves, NZAC#04­003 b: 1/1adf.

Paratype females: same data as holotype, NZAC#04­003 a,c, f–i: 6/13adff; as previous, except 15 Feb 2004, NZAC#04­038 : 2/2adff .

Other material: Same data as holotype, except 13 June 2004, NZAC#04­112 : 1/4adff; as previous except 27 Aug 2004, NZAC#04­219 :1/1adf; as previous, except 17 Oct 2004, NZAC#04­238 : 1/2adff, #04­239: 2/10adff, #04­240: 1/1adf; Waitakere Ra, Crusher Pipe Track, 23 June 2002, NA Martin, on leaves of D. cupressinum, NZAC #02­131: 1/1adf .

Remarks: for a discussion of the differences between this species and U. rimu described as new, see below under that species.

Etymology: bispinatus refers to the presence of the typical large stigmatic spines in the anterior stigmatic clefts only and the unusual absence of corresponding large spines in the posterior clefts, these replaced by enlarged marginal spinose setae on both margins of each stigmatic cleft. Epelidochiton piperis (Maskell) also lacks stigmatic spines in the posterior clefts, and a small differentiated spine is present only occasionally in the anterior stigmatic clefts. All other known New Zealand indigenous Coccidae have either only one or more than 3 differentiated stigmatic spines in both anterior and posterior clefts, or have stigmatic spines not differentiated from marginal spines.

Figures

FIGURE 1. Umbonichiton bispinatus Henderson & Hodgson, sp. nov., adult female.