Pleotrichophorus longirostris Hille Ris Lambers 1969

Pleotrichophorus longirostris Hille Ris Lambers, 1969:178–179

DIAGNOSIS.—From Hille Ris Lambers’ (1969) descriptions and figures, P. longirostris appears most closely related to P. brevinectarius in having dense head (df = 47) and body setae (20 setae per square .10 mm), stoutly elongate cauda which bears usually more than 1 (2–4; and 1–4, m = 2.11, n = 11 for P. brevinectarius) posterodorsal hairs, rather short cornicles, and needle-tipped rostrum IV+V. The last rostral segment, however, is much longer (.17–.19 vs. .12–. 14 mm) and its ratio to the second hind tarsal joint is much greater (“just over 1½ times” [Hille Ris Lambers, 1969:178] vs. 1.00 ± .02, n = 27); co/ca ratio relatively larger (.61 ± .04, n = 5 vs. .35 ± .01, n = 40); and appendages, including antennae, legs and cornicles pale brownish instead of pale with only extreme apices darkened as in P. brevinectarius.

DESCRIPTION.—Apterous Viviparous Female: Data taken from original description: BL 1.65–1.90; antennae 2.20–2.30, with a.s.III .43–.49, a.s.IV .37–.40, a.s.V .35–.37, and a.s.VI .14–.17 + .68–.79; cornicles .16–.19, cauda .26–.31 and rostrum IV+V .17–.19 mm. Proportions of VIu/VIb 4–5; co/ca .60–.63 (.61 ± .04, n = 5; calculated from tabulated measurements); rostrum IV+V/ hind ta–2 “just over 1½ times” [Hille Ris Lambers, 1969:178]. Number of df setae 47; posterodorsal caudal setae 2–4; sensoria on a.s.III 1–2, rarely 3.

Alate Viviparous Female: Unknown.

Sexuales: Unknown.

HOST.—Eriophyllum staechadifolium.

DISTRIBUTION.—So far known only from type-locality in Monterey Co., California.

TYPES.—Holotype apt.v.f. and some paratypes in DHRL collection; other paratypes in Department of Biological Control, University of California at Berkeley.

SPECIMENS EXAMINED.—None.

Pleotrichophorus magnautensus (Knowlton and Smith)

Capitophorus magnautensus Knowlton and Smith, 1936a: 110 [type: Fort Duchesne, Utah, 14–VII–1927, GFK, on Chrysothamnus viscidiflorus; types in USNM]; 1937:51.

Capitophorus magnautensis [sic] Knowlton and Smith.—Knowlton, 1948:123.—Palmer, 1952:262–263.—Knowlton, 1954:8.

Pleotrichophorus magnautensus (Knowlton and Smith).—Hille Ris Lambers, 1969:167, 179.

DIAGNOSIS.—This species is distinctive with its large size (more than 2.0 mm), entirely dark, short cornicles that are slightly shorter than the cauda (co/ca ratio m = .91 ± .03, n = 18), short stout and blunt-tipped rostrum IV+V that is about ⅔ (.68 ± .52, n = 10) hind ta–2 in length, the minute head and body setae, and numerous minute setae on the venter of the head and first antennal segment. It resembles P. utensis in the shape of rostrum IV+V and in having flattened posterodorsal caudal setae but these caudal setae are more numerous (1–4, m = 2.77, n = 9 vs. 0–2, m = 1.17, n = 15) and all dorsal setae much smaller.

DESCRIPTION.—Apterous Viviparous Female: Color in life, green; cleared specimens pale with tips of rostrum, tibiae, a.s.III, IV, and V, entire a.s.VI and tarsi, and cornicles from near bases dark brown. Body 2.54–2.65 (2.60, n = 5) mm long, .50–.58 (.551, n = 7) mm across eyes. Head with well-developed laterofrontal tubercles, mesofrontal tubercle hardly produced, frontal margin appearing smoothly concave; mf usually 1p, lf 2–6 (usually 4) on each side, vlf 1p (may be situated closer than usual to vf setae and in such cases not morphologically recognizable from them and from other laterofrontal setae), df 10–14 (12.25 ± 1.47, n = 8), vf 6–12 on each side but usually 9 pairs present, pc 2p, ac 3–5, and md 3–4p; dorsal setae minute, subequally long (df–1 averaging .0080 mm), rod-shaped or merely incrassate at apices; ventral setae similar in size and shape but ac slightly longer than others. Antennal segment I moderately produced on inner distal margin, imbricate, with usual pointed basal seta on dorsum, 15–27 blunt or apically thickened setae arranged in 2 to 3 rows along outer and distal ventral margins of segment. A.s.II imbricate, usually with setae with one sometimes added or missing. A.s.III with minute setae and 1–6 (2.9, n = 11) sensoria. A.s.IV slightly longer than A.s.V, about 9/10 and ¾ length of a.s.III, respectively; unguis of a.s.VI 5¾–6¾ (6.25, n = 6) times length of base.

Body integument striate to reticulate on dorsum, striae more pronounced and spiculate posteriorly; lateral integument around stigmatal openings produced into tuberculate processes, these tubercles increasing in size from abd.s. 1 to 7; rather sparsely covered with minute, inconspicuous, slightly knobbed setae. Cauda elongate, tapering only slightly, with rounded tip; spiculate; slightly dusky; with 2 pairs pointed lateral and 1–4 (2.77, n = 9) apically flattened, small posterodorsal setae. Cornicles .28–.41 (.353, n = 16) mm long, .78–1.03 times (.91 ± .03, n = 18) as long as cauda; cylindrical with slightly thickened apices; faintly imbricate–spiculate. Legs with 3, 3, 3 hairs on first tarsal joints; hind tibiae 1.45–1.75 (1.62, n = 9) and hind ta–2 .11–.16 (.147, n = 9) mm long. Rostrum IV+V stout, very slightly tapered apex blunt, .09–.11 (.099, n = 8) mm long and .56–.91 (.68 ± .52, n = 10) times as long as hind ta–2, with 1 basal, 2 dorsal, and 3 lateral pairs of setae, al, ml and pl setae subequal in length.

Alate Viviparous Female: Unknown.

Sexuales: Unknown.

HOSTS.—Chrysothamnus viscidiflorus and Chrysothamnus sp.

DISTRIBUTION.—Recorded from several localities in Utah, generally in northeastern and central portions of the state; records also include Onetree, Wyoming, near the northeastern corner of Utah and Dinosaur, Colorado also near the Utah border.

TYPES.—Since these types were not seen, a type-specimen has not been fixed from among the original series collected from Duchesne, Utah. Two paratype slides, from Randlett and Tropic, Utah, were examined from EOE collection at Berkeley, California.

In a subsequent publication by Knowlton and Smith (1937), they refer to additional paratype records (Tropic, Orangeville, and Huntington, Utah) that were inadvertently omitted from the original description (Knowlton and Smith, 1936a); Randlett, Utah, is implied as having been originally included but actually is not listed in the original description.

These paratype designations (viz., Tropic, Orangeville, Huntington, and Randlett, Utah) probably constitute a valid paratype designation. The original type-series, however, is likely to include more than a single species as experience with similar older collections of other Pleotrichophorus species has shown. The status of these type-specimens can not be properly determined until the Duchesne, Utah, series is reconsidered.

SPECIMENS EXAMINED.—COLORADO: Dinosaur, 14–VIII–1966, GFK, on unknown host (LACR coll.). UTAH (all labeled “paratypes” and EOE coll.): Tropic, 3 apt.v.f. and 1 apt.ny., 19–IX–1935, GFK, on Chrysothamnus sp.; and Randlett, 5 apt.v.f. and 1 apt.ny., 14–VII–1927, GFK, on C. viscidiflorus.