Chionaspis torreyanae Vea

Vea, Isabelle M., Gwiazdowski, Rodger A. & Normark, Benjamin B., 2013, Corroborating molecular species discovery: Four new pine-feeding species of Chionaspis (Hemiptera, Diaspididae), ZooKeys 270, pp. 37-58 : 46-48

Chionaspis torreyanae Vea sp. n. Figure 4

Morphogroup E in Gwiazdowski et al. (2011).

Type material.

Type location: U.S.A., California, Channel Islands, Santa Rosa Island, 33°59.09'N, 120°1.42'W, on needle of Pinus torreyana insularis Schoenherr et al., 23 January 2008, C. Greene coll.

Type specimen:

Holotype adult female, slide-mount in balsam. Original label "D2238A, USA: California, Santa Rosa Island, 23.i.2008, 33°59'5.4"N, 120°01'25.4"W, Carolyn Greene, Pinus torreyana insularis ", deposited at UMAM.

Paratypes: Adult females on separate slides, D2238D, E and G, same information as D2238A, deposited at USNM.

Other material examined: Adult female, slide-mount in balsam, original label "D1557A, USA: California, San Diego, 30.viii.2006, 32°56'27.2"N, 117°15'41.0"W, Rodger Gwiazdowski, Pinus torreyana ", deposited at UMAM. Adult females on separate slides, D1557D, E, F and G, same collection as D1557A, deposited at UMAM.

Adult female, slide-mount in balsam, original label "D1559A, USA: California, San Diego, 30.iii.2006, 32°55'12.9"N, 117°15'09.9"W, R. Gwiazdowski, Pinus torreyana ', deposited at UMAM. Adult female, D1559C, same collection data as D1559A, deposited at UMAM.

Adult female, slide-mount in balsam, original label "D2235A, USA: California, Santa Rosa Island, 23.i.2008, 33°59'04"N, 120°01'34.9"N, Carolyn Greene, Pinus torreyana insularis ", deposited at USNM. DNA:AMCC: 205821. Adult female, slide-mount in balsam, original label "D2236A, USA: California, Santa Rosa Island, 23.i.2008, 33°59'4.9"N, 120°01'35"W, Carolyn Greene, Pinus torreyana insularis ", deposited at UMAM.

Adult female, slide mount in balsam, original label "D2240A, USA: California, Santa Rosa Island, 33°59'2.3"N, 120° 1'11.7"W ", Carolyn Greene, Pinus torreyana insularis ", deposited at UMAM. Adult females on separate slides, D2240C and D, same collection data as D2240A, deposited at UMAM.

Diagnosis.

Chionaspis torreyanae Vea differs from other Chionaspis with the combination of following characters (Table 1): gland spine formula 2-2-2, microduct formula 2-2-2, other abdominal gland spines usually each subtended by 2 microducts, unnotched pygidial lobes.

Description.

Field characters: All pine-feeding Chionaspis reported here, including Chionaspis heterophyllae and Chionaspis pinifoliae are indistinguishable by eye in the field. See the description above for Chionaspis brachycephalon Vea.

Slide-mounted adult female (Figure 4): spindle-shaped and elongate, lobed laterally and broader posteriorly (generally broadest at metathorax), length of holotype 1.55 mm, range (n=16) 1.15 mm - 1.65 mm; maximum width of holotype: 0.65 mm; range (n=16) 0.475 - 0.875 mm, maximum width at metathorax, rarely on first abdominal segment.

Pygidium: Lobes. Posterior margin with 3 pairs of definite lobes (L1, L2 and L3), fourth pair (L4) of lobes appear as series of low, sclerotized points; paraphyses absent. L1 separated by space 0.3 - 1 (0.6) times width of lobes, with a thick, protruding, U-shaped yoke uniting L1, lateral margins of lobes parallel, slightly diverging near apex, medial margin parallel-sided. L1 usually entire (1 minute notch may be present); L2 bilobed, smaller than L1, medial lobule always larger, both lobules entire; L3 bilobed, lateral lobule usually obsolete, or, when present, shorter than medial lobule but about equal in width. Gland spines. Gland spine formula 2-2-2 (microduct formula 2-2-2), with 1 short gland spine near each body margin on abdominal segment 5; without gland spines between median lobes. Ducts. Large macroducts in submedian area of segments 5 and 6 (with 4 - 6 (5) on segment 5 and 3 - 6 (4) on segment 6); in sub marginal areas of segment 5 (with 5 - 8 (6)); in marginal area of segments 5 to 7 (with 2 - 3 (2) on segment 5, 2 on segment 6 and 1 on segment 7); absent on segment 8. Largest macroduct on segment 7 (between L1 and L2) 15 - 22.5 (20) μm long. Pygidial microducts always on venter in submarginal areas of segment 5 to 7, with 1 - 2 (1) duct on segment 5, 2 ducts on segment 6 and 1 duct on segment 7; pygidial microducts absent from dorsum. Pores. Perivulvar pores with 5 loculi, in 5 groups, 1 median with 8 - 17 (8) pores, 2 anterolateral with 20 - 27 (23) pores, 2 posterolateral with 17 - 26 (20) pores. Anal opening. Located 6.1 - 11.2 (9) times length of anal opening from base of median lobes, diameter 12.5 - 17.5 (15) μm. Setae. Dorsal setae: 2 setose on L1, 1 setose (~ 11 m) between lobules of L2 and L3. Ventral setae: 1 small on L1, 1 marginal at base of each gland spine cluster and 1 in submarginal area of each segment, 2 in submedian area of segment 6, small and short; 2 pairs of setae in a row anterior to the vulva.

Prepygidium: Gland spines. Near each body margin from segment 1 or 2 to 4, absent from mesothorax and metathorax; with 0 - 3 (0) on segment 1, 1 - 7 (3) on segment 2, 2 - 4 (3) on segment 3 and 1 - 2 (2) gland spine on segment 4 with 2 microducts extending, short and protruding from margin. Gland spines from segment 1 to 3 the smallest and never protruding from margin. Ducts. Macroducts of 2 sizes; largest macroducts in submedian and submarginal areas of abdominal segments 4 and 3. Small macroducts in submedian area of either or both of segments 3 and 4, in marginal areas from meso- or metathorax to segment 3. Prepygidial microducts sparsely present on venter and dorsum from segment 1 to 4.

Cephalothorax: Microducts sparsely present on venter and dorsum.Perispiracular pores primarily with 3 loculi, anterior spiracles with 5 - 8 (6) pores, posterior spiracles with 2 - 5 (3) pores. Eyes represented by small sclerotized area, located on body margin at level near anterior clypeolabral shield. Antennae each with 1 long seta and 2 shorter setae, distance between two antennae 65 - 135 (85) μm.

Etymology.

The epithet torreyanae is a Latin noun, genitive case, meaning "of torreyana", referring to the pine species Pinus torreyana , on which Chionaspis torreyanae Vea was collected.