Cryptococcus fagisuga Lindinger

Miller, Douglass R. & Stocks, Ian C., 2022, New genera and species of felt scales (Hemiptera: Coccomorpha: Eriococcidae), with descriptions of new species and immature instars of described species, Zootaxa 5221 (1), pp. 1-213 : 62-65

Cryptococcus fagisuga Lindinger

Cryptococcus fagisuga Lindinger 1936: 444 .

Specimens examined: UNITED STATES: Massachusetts: Berkshire Co.: Jamaica Plain, Arnold Arboretum , XII-20-1929, on Fagus grandifolia, J. Ehrlich (4 ad. ♀♀, 15 first-instar nymphs on 2 slides) USNM . New Hampshire: Grafton Co.: Franconia Notch State Park , VI-25-1967, on F. grandifolia, M. Kosztarab (10 ad. ♀♀ on 6 slides) CDFA . New Jersey: Bergen Co.: Fort Lee, Coytesville , IX-3-1944, on F. grandifolia, G. Rau (7 ad. ♀♀, 11 firstinstar nymphs on 3 slides) USNM . New York: Nassau Co.: Long Island, Locust Valley , XII-15-1934, on “beech” (= F. grandifolia ?) G. Van Yahres (7 ad. ♀♀, 15 first-instar nymphs on 3 slides) USNM ; Westchester Co.: Scarsdale , IX-27-1934, on “beech,” E.P. Felt (5 ad. ♀♀, 22 first-instar nymphs on 1 slide) USNM . EUROPE, locality (?), Maskell collection #163 (13 ad. ♀♀, 11 first-instar nymphs on 4 slides) USNM . FRANCE: near Trianon Palace, Versailles , VIII-12-1966, trunk of F. sylvatica , E. and M. Kosztarab (1 ad. ♀ on 1 slide) CDFA . GERMANY: Hamburg, VIII-(?)-1898, on Fagus sp. , L. Reh (11 ad. ♀♀, 11 first-instar nymphs on 3 slides) USNM . UNITED KINGDON: Isle of Man: Laxey , VII-11-1998, on F. sylvatica, F.D. Bennett (1 ad. ♀ on 1 slide) CDFA . POLAND: Szcezecin, Stettin , VII-28-1898, on “beech,” T. Pergande (68 ad. ♀♀, 26 second-instar ♀♀ on 9 slides) USNM .

Etymology: The species epithet “ fagisuga ” is based on the scientific Latin name of its host “ Fagus ” and the Latin suffix “ sug ” meaning “under” or “within”, possibly referring to living in confined areas on the “ Fagus ” host.

The adult female of this species was described in detail by Miller and Miller (1993) and information in that paper is not repeated here.

Second-instar female ( Fig. 31 )

Description: Slide-mounted specimens 0.3–0.4 mm long, 0.2–0.3 mm wide. Body rotund, without protruding anal lobes. Anal-lobe area dorsally with 1 or 2 enlarged setae; ventrally each with 3 enlarged setae associated with anal opening, without elongate anal-lobe seta.

Dorsum with flagellate setae arranged in 3 pairs of longitudinal lines (medial, mediolateral and lateral), each seta about 5 μm long. Without enlarged setae. Macrotubular ducts distributed in same pattern as flagellate setae. Microtubular ducts, when present, restricted to 1 or 2 along body margin of head and/or abdomen. Multilocular and cruciform pores and microtrichia absent.

Anal ring apical, with sclerotized plate around opening, with 2 enlarged setae on each side of ring immediately adjacent to ring and 3 enlarged setae on each side of ring laterad to opening, without pores. Anal tube and anal opening weakly sclerotized, without anal flap.

Venter with flagellate setae about same length throughout surface, longest seta on segment II 5 μm long, on segment VII 6 μm long; distinct anal-lobe seta absent. Enlarged setae restricted to anal-lobe area. Macrotubular ducts of 2 sizes: small size normally absent, when present restricted to areas of abdomen; larger size present along body margin. Microtubular ducts absent or present in small numbers on head. Multilocular pores all 5-locular, restricted to spiracular openings. Legs absent except for small pocket in position of metathoracic legs. Antennae normally unsegmented, sometimes with indication of 2 or 3 segments, each about 15 μm long. Labium with 2 indistinct segments, basal segment not observed. Frontal lobes and preantennal pores absent. Microtrichia present on segments VI to VIII.

Notes: The description is based on 26 specimens from one locality. Second-instar females of Cr. williamsi have not been available for comparison.

First-instar nymph ( Fig. 32 )

Description: Slide-mounted specimens 0.3–0.4 mm long, 0.1–0.3 mm wide. Body oval or rotund, with slightly protruding anal lobes. Anal-lobe areas each dorsally with 1 pair of enlarged setae; ventrally with 1 flagellate seta and anal-lobe seta.

Dorsum with flagellate setae arranged in 3 pairs of longitudinal lines (medial, mediolateral and lateral), longest seta on segment II about 3 μm long, on segment VII about 9 μm. Enlarged setae present in cerarian arrangement on lateral areas of segments V or VI to VIII. Macrotubular and microtubular ducts absent. Multilocular pores tubular, of 5-locular type, arranged in 2 pairs of longitudinal lines on abdomen (mediolateral and lateral), also present on head. Microtrichia absent.

Anal ring apical, normally poorly developed, without enlarged plate anteriorly and without pores. With 1 or 2 enlarged setae associated with ring and 1 or 2 flagellate setae but not on it. Anal tube and anal opening without sclerotization; without anal flap.

Venter with flagellate setae present over entire surface, longest seta on segments II about 3 μm long, on segment VII about 7 μm long; anal-lobe seta about 42 μm long. An enlarged seta on segment VIII on each side of anal ring near posterior apex of body. Macrotubular ducts and microtubular ducts absent. Multilocular pores tubular, of 2 kinds: 3-locular pores normally present near base of posterior pair of legs; 5-locular pores present in 2 pairs of longitudinal lines on thorax and abdomen, absent from head. Legs present; each femur with 3 setae; each tibia with 1 seta; tibia and tarsus partially or completely separated; claw and tarsal digitules unusually long, apically capitate; claw without a denticle. Antennae each 5-segmented, about 55 μm long. Frontal lobes, preantennal pores and microtrichia absent.

Notes: The description is based on 85 specimens from six localities. The first-instar nymphs of Cr. fagisuga and Cr. williamsi are similar in having 5-segmented antennae, a similar anal ring structure, and no tubular ducts. Cryptococcus williamsi can be separated as follows (character states of Cr. fagisuga are given in brackets): each femur with one seta (three setae); ventral multilocular pores primarily with three loculi (five loculi).

Figures

FIGURE 31. Cryptococcus fagisuga Lindinger 1936, second-instar female, Stettin, Szczecin, Poland, July 28, 1898, on “beech” (= Fagus sp.?). T. Pergande. D=5-locular pore; F=microtubular duct; G=macrotubular duct; I=anal ring; J=antenna; N=flagellate seta.

FIGURE 32. Cryptococcus fagisuga Lindinger 1936, first-instar nymph, Jamaica Plain, Arnold Arboretum, Berkshire Co., Massachusetts, USA, December 20, 1929, on Fagus grandifolia, J. Ehrlich. A=enlarged seta; D=5-locular pore; E=3-locular pore; I=anal ring; L=claw; N=flagellate seta.