Ovaticoccus telotrichus Miller and Stocks, 2022

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 : 162-169

Ovaticoccus telotrichus Miller and Stocks sp. n.

Type material: Adult female holotype (only specimen on slide) with left label “Ovaticocccus / telotrichus / ad ♀ / on grass / Iron Mt. Ranch / 8 mi. N. Marathon / Brewster Co. Texas / V-11-1976 R.D. Gordon / D.R. Miller #3172;” right label “ Ovaticoccus / telotrichus / Miller & Stocks / HOLOTYPE / USNM;” label on back “ Ovaticoccus / telotrichus Miller / & Stocks / HOLOTYPE / USNM / Iron.” The holotype is deposited in the USNM . Paratypes: MEXICO: Jalisco: 23 mi. S. Guadalajara, on unknown grass, D.R. Miller and F.D. Parker (8 second-instar ♀♀, 3 second-instar ♁♁, 13 first-instar nymphs on 8 slides) USNM (7 slides), UNAM (1 slide) ; Tlaxcala: 26 km. N. Apizaco , VII-12-1967, on unknown grass, J. Villanueva B. and D.R. Miller (1 ad. ♀, 6 first-instar embryos on 2 slides) UCD (1 slide) , UNAM (1 slide) . UNITED STATES: Texas: Brewster Co.: Iron Mountain Ranch, on unknown grass, R.D. Gordon and D.R. Miller (3 ad. ♀♀, 2 second-instar ♀♀, 1 second-instar ♁, 1 third-instar ♁ on 4 slides) USNM .

Etymology: The name “ telotrichus ” is formed from the Greek words “ telos ” meaning “end”, and “ trichos ” meaning “hair”, and refers to the diagnostic enlarged setae on the posterior end of the abdomen.

Field features: Occurring in leaf blade sheaths.

Adult female ( Fig. 83 )

Description: Holotype, slide mounted, 3.6 mm long, 1.4 mm wide (paratypes 2.7–4.8 mm long, 1.0– 2.2 mm wide). Body elongate oval; without protruding anal lobes. Anal-lobe area on each side dorsally with 1 flagellate seta (paratypes with 1 or 2), 2 or 3 conical enlarged setae, 2 or 3 microtubular ducts (paratypes sometimes with 1), with or without multilocular pores; ventrally each with 2 flagellate setae including anal-lobe seta, 4 or 5 multilocular pores (paratypes with 5–12), 1 microtubular duct, 1 or 2 macrotubular ducts.

Dorsum with flagellate setae slightly shorter than those on venter on posterior segments, conspicuously shorter anteriorly, scattered over entire surface. Enlarged setae of 2 sizes and shapes; conical setae restricted to 2 on 1 side and 3 on other (paratypes with 3 on each side) on posterior apex of abdomen; largest seta about 25 μm long; enlarged setae conical, with straight sides and rounded apex; setal base large, not recessed in dermal pockets; other setae nipple-shaped, forming longitudinal line laterally, holotype with 1 seta on each side of several abdominal segments and on thorax, some paratypes with 3 on each side of each abdominal segment; with curved sides, apex rounded; setal base medium; recessed in dermal pockets; segment IV with 12 setae (paratypes with 12–16), all flagellate; segment IV with combined total of 2–6 enlarged setae dorsally and ventrally. Macrotubular ducts absent (paratypes with small numbers on segments V to VII). Microtubular ducts each approximately 6 μm long (paratypes 6–8 μm), area farthest from dermal orifice sclerotized and divided into 2 parts, apical portion rounded, slightly shorter than remaining sclerotized portion; dermal orifice large and heavily sclerotized; with tube protruding from orifice. Microtubular ducts in small numbers along body margin, nearly absent on thorax. Multilocular pores on posterior margins of segments III to VII, on anterior margin of segment VIII (some paratypes on posterior margins of VII and VIII only), and on anterior margin of head (some paratypes, on lateral margins of thorax); of 3 kinds: 9-locular pores less abundant than 7-locular pores; 5-locular pores rare. Cruciform pores along body margin and in medial areas of segments VI to VIII. Microtrichia on segment VIII.

Anal ring ventral, complete, with few small cells, with 3 setae on each side of ring, each approximately same length as, or slightly shorter than, greatest diameter of ring, without additional pair of setae associated with ring, anal tube unsclerotized, anal orifice sclerotized, with anal flap.

Venter with longest flagellate seta on segment II 29 μm long (paratypes 28–29 μm) segment VII 40 μm long (paratypes 23–35 μm); anal-lobe seta broken (paratypes 150–165 μm long). Enlarged setae variable, of 1 size; in 1 pair of longitudinal lines (sublateral) with 4 setae on 1 side and 2 on other, with 1 seta per segment when present (some paratypes with 2 pairs of longitudinal lines [lateral and sublateral] from mesothorax to segment VII; normally with 3 pairs per segment); largest seta about 13 μm long, nipple-shaped, with central projection, lateral margins curved; setal base thick; recessed in dermal pocket. Macrotubular ducts on segments II to VIII. Microtubular ducts along body margin. Multilocular pores over entire surface, noticeably abundant along body margin, in medial areas on posterior 4 or 5 abdominal segments; of 3 or 4 kinds: 9-locular pores less numerous than 7-locular pores; 5- locular pores and 6-locular pores rare or absent. Cruciform pores along body margin from head to segment V, also in small numbers in medial areas of segments V and VI. Legs without pores; each femur with 5 setae including 2 proximal setae and 3 distal setae; each tibia with 4 setae, without middle seta; with hind tibia/tarsus 0.9 (paratypes 1.0). Antennae each 7-segmented (paratypes sometimes 6-segmented with third segment partially divided), 150 μm long (paratypes 160–170). Frontal lobes absent. Preantennal pore present. Microtrichia from prothorax to segment V, also on all coxae.

Notes: This description is based on five specimens from two localities. The adult female of Ov. telotrichus is similar to the adult female of Ov. davesmithi and Ov. tippinsi in having five setae on each femur, nipple-shaped enlarged setae, and enlarged setae arranged in lateral longitudinal lines on venter. They differ as follows (character states in brackets are of Ov. telotrichus ): without enlarged setae on segment VIII or without conical setae on segment VIII (with three pairs of conical setae on segment VIII).

Second-instar female ( Fig. 84 )

Description: Slide-mounted specimens 1.3–1.4 mm long, 0.5 mm wide. Body elongate oval, without protruding anal lobes. Anal-lobe areas dorsally each with 3 enlarged setae, 0 or 1 flagellate setae, 2 or 3 microtubular ducts; ventrally each with 3 flagellate setae, suranal seta and including anal-lobe seta, with 1 microtubular duct, 1 or 2 multilocular pores.

Dorsum with flagellate setae forming 3 pairs of longitudinal lines on abdomen (medial, mediolateral and lateral), more widely scattered on thorax and head. Enlarged setae of 2 sizes and shapes; conical setae restricted to 3 pairs on posterior apex of abdomen; largest seta 25–27 μm long; enlarged setae conical, with straight sides and narrow, rounded apex; setal base large; not recessed in dermal pockets; other enlarged setae nipple-shaped, forming 2 pairs of longitudinal lines (mediolateral and lateral), with 1–4 setae on each side of each abdominal segment, from head to segment VII, with curved sides, apex rounded or truncate; largest seta 6–8 μm long; setal base medium; recessed in dermal pockets; segment IV with 9–11 setae including 3 or 4 enlarged setae and 6 or 7 flagellate setae; segment IV with combined total of 5 or 6 enlarged setae dorsally and ventrally. Macrotubular ducts absent. Microtubular ducts 4–5 μm long, with area farthest from dermal orifice sclerotized and divided into 2 parts, apical portion truncate, about same size as remaining sclerotized portion; total sclerotized area longer or same length as unsclerotized area; dermal orifice unusually large, sclerotized; with or without protruding tube. Microtubular ducts associated with enlarged setae in mediolateral and lateral areas from head to segment VIII. Multilocular pores restricted to head, sometimes with only 1 or 2. Cruciform pores in mediolateral and lateral areas of head or prothorax to segment VII. Microtrichia from segment III or IV to VIII, absent on 1 specimen.

Anal ring oval, ventral, cellular, heavily sclerotized, anterior section bridged by anal opening and flap, with 3 setae on each side of ring, with additional pair of setae associated with ring, longest seta longer than greatest diameter of anal ring; anal tube unsclerotized, anal opening sclerotized, with anal flap.

Venter with longest flagellate seta on segment II 16–25 μm long, on segment VII 20–28 μm long; anal-lobe seta 122–127 μm long. Enlarged setae nipple-shaped, in 1 longitudinal line (sublateral) from thorax to segment VII, sometimes with 1 or 2 mediolaterally on posterior abdominal segments. Macrotubular ducts absent. Microtubular ducts limited to lateral areas of abdomen. Multilocular pores scattered over entire surface, of 3 kinds: 7-locular pores most abundant; 9-locular pores less common, most abundant on thorax and head: 5-locular pores less common, most abundant on abdomen. Cruciform pores absent. Legs with each coxa with 0–4 indefinite pores; each femur with 5 setae including 2 proximal setae and 3 distal setae; each tibia with 4 setae, without middle seta; hind tibia/tarsus 0.8– 0.9. Antennae each 6-segmented, 122–142 μm long. Frontal lobes absent. Preantennal pore present. Microtrichia from prothorax to segment VI or VII, on hind 2 pairs of coxae.

Notes: The description is based on 10 specimens from two localities. The second-instar female of Ov. telotrichus is most similar to the second-instar of Ov. cornutus in having dorsal cruciform pores, each femur with five setae, nipple-shaped enlarged setae, multilocular pores predominantly with more than five loculi, and dorsal multilocular pores restricted to head. They differ as follows (character states in brackets are those of Ov. telotrichus ): enlarged setae nipple-shaped on posterior abdominal segment (conical); eye spur-shaped (dome-shaped); with medial longitudinal line of enlarged setae (without medial line); 9-locular pores absent or rare (abundant).

Third-instar male (prepupa) ( Fig. 85 )

Description: Slide-mounted specimen 1.0 mm long, 0.4 mm wide, not including wing buds. Small lateral lobes on segment VIII.

Dorsum with flagellate setae in 3 pairs of longitudinal lines (medial, mediolateral and lateral) on each abdominal segment except segment VIII, mediolateral line with 2 or 3 setae on each side, medial and lateral lines each with 1 seta, setal apices acute. Multilocular pores in medial longitudinal line on abdomen also with 1 or 2 pores mediolaterally, with 1 or 2 pores on head and thorax. Front wing buds each approximately 12 μm long. Ocular sclerite absent. Microtrichia on segments VII and VIII.

Abdominal segment IX small, protruding slightly, unsclerotized; anal opening dorsal; small lobes present.

Venter with flagellate setae apically acute, slightly longer than those on dorsum; longest lateral setae on segment IX about 80 μm long. Multilocular pores with 5–13 loculi, scattered over surface of head and thorax, in medial and lateral areas on abdomen, most abundant laterally. Legs and antennae small and poorly defined, partially sclerotized. Eye absent. Microtrichia from head to segment IX.

Notes: The description is based on one specimen from one locality. The third-instar male of Ov. telotrichus is most similar to the macropterous prepupa of Hy. hyperici in having reduced appendages, reduced or no mouthparts, and the presence of multilocular pores and flagellate setae. They differ as follows (character states in brackets are of Ov. telotrichus ): dorsal multilocular pores absent medially (present medially on abdomen); without multilocular pores on head and thorax (present, uncommon).

Second-instar male ( Fig. 86 )

Description: Slide-mounted specimens, 1.0– 1.1 mm long, 0.4 mm wide. Body elongate oval, without protruding anal lobes. Anal-lobe areas dorsally each with 3 enlarged setae, 1 microtubular ducts, 2 or 3 multilocular pores; ventrally each with 3 flagellate setae including suranal seta and anal-lobe seta, 1–4 multilocular pores.

Dorsum with flagellate setae scattered over entire surfaces, not forming definite longitudinal lines. Enlarged setae of 1 size restricted to 3 pairs on posterior apex of abdomen; largest seta about 10 μm long; enlarged setae conical, with straight sides and narrow, rounded apex; setal base large; not recessed in dermal pocket; segment IV with 10–12 setae, all flagellate. Macrotubular ducts scattered over entire surface. Microtubular ducts 4–5 μm long, with area farthest from dermal orifice sclerotized and divided into 2 parts, apical portion truncate, about same size as remaining sclerotized portion; total sclerotized area longer, or same length as, unsclerotized area; dermal orifice unusually large, sclerotized; with or without protruding tube. Microtubular ducts rare, restricted to posterior abdominal segments, sometimes absent; specimens from Texas with more dorsal microtubular ducts in mediolateral areas. Multilocular pores variable, same relative abundance as on venter, usually on head, mesothorax, and posterior margin of abdominal segments. Cruciform pores most abundant laterally on thorax and anterior abdominal segments, occasionally in mediolateral areas of abdomen. Microtrichia obvious on segment VIII, inconspicuous on segments VI and VII.

Anal ring oval, ventral, cellular, heavily sclerotized, anterior section bridged by anal opening and flap, with 3 setae on each side of ring, with additional pair of setae associated with ring, longest seta longer than greatest diameter of anal ring; anal tube unsclerotized, anal opening sclerotized, with anal flap.

Venter with longest flagellate seta on segment II 20–25 μm long, on segment VII 22–28 μm long; anal-lobe seta 88–96 μm long. Enlarged setae absent. Macrotubular ducts in small numbers over surface, absent medially on thorax, most abundant laterally. Microtubular ducts absent. Multilocular pores scattered over entire surface, of 2 kinds: 7-locular pores most abundant, 5-locular pores most abundant on abdomen; Texas specimens with more 5- locular pores, less common than 7-locular pores. Cruciform pores scattered laterally. Legs without pores; each hind femur with 5 setae including 2 proximal setae and 3 distal setae; each tibia with 4 setae, without middle seta; hind tibia/tarsus 0.8–0.9. Antennae each 7-segmented, 125–127 μm long. Frontal lobes absent. Preantennal pore present. Microtrichia from prothorax to segment VIII, on hind 2 pairs of coxae.

Notes: The description is based on four specimens from two localities. The second-instar male of Ov. telotrichus is most similar to the second-instar male of Ov. davesmithi in having the anal ring with pores and an anal flap, each femur with five setae, and with dorsal multilocular pores. They differ as follows (character states in brackets are those of Ov. telotrichus ): apex of abdomen without conical enlarged setae (with three pairs of conical enlarged setae); nipple-shaped enlarged setae present (nipple-shaped setae absent); and multilocular pores predominantly with five loculi (seven loculi).

First-instar nymph ( Fig. 87 )

Description: Slide-mounted specimens 0.4–0.7 mm long, 0.2–0.3 mm wide. Body broadly oval, without protruding anal lobes. Anal-lobe area on each side dorsally without flagellate seta, with 3 conical enlarged setae, with 1 microtubular duct; ventrally each with 1 or 2 flagellate setae including anal-lobe seta.

Dorsum with flagellate setae arranged in 2 pairs of longitudinal lines (medial and lateral) on mesothorax to segment IV or V, randomly scattered on head and prothorax. Enlarged setae of 2 kinds: conical setae in anallobe area, 3 on each side of segment VIII, also with 1 pair on sublateral and lateral areas of segments IV or V to VII; nipple-shaped setae in 2 pairs of longitudinal lines (sublateral and lateral, lateral line partially ventral) from prothorax or mesothorax to segment VII, each line composed of 1 seta per segment, with 2 pairs of setae on anterior margin of head. Largest conical seta about 18 μm long, much more elongate than on adult female, with more acute apex and smaller setal base; largest nipple-shaped seta about 8 μm long; segment IV with 7 or 8 setae including 6 flagellate setae and 1 or 2 slightly enlarged setae; segment IV with combined total of 4 or 5 enlarged setae dorsally and ventrally. Macrotubular ducts absent. Microtubular ducts about 4 μm long, with area farthest from dermal orifice sclerotized and undivided. Microtubular ducts in lateral line from segment II to VII. Multilocular pores absent. Cruciform pores, when present, near body margin at juncture of thorax and abdomen. Without microtrichia.

Anal ring apical or ventral, circular, divided anteriorly and posteriorly, cellular, with 3 somewhat enlarged setae on each side of ring, each longer than greatest diameter of ring, anal tube unsclerotized, anal opening slightly sclerotized, apparently with anal flap.

Venter with longest flagellate seta on segment II 14–15 μm long, on segment VII 20–22 μm long; anal-lobe seta 110–112 μm long. Enlarged setae in longitudinal line along body margin, conical posteriorly, nipple-shaped anteriorly, from prothorax to segment VIII. Microtubular ducts absent. Multilocular pores present at base of antennae, near eye, between front leg and mouthparts, laterad to front legs, 1 associated with each spiracle, 1 mesad to each mid- and hind coxa, 1 between mid- and hind pair of legs mediolaterally, 5 or 6 forming mediolateral longitudinal line on each side of abdominal segments, sometimes with 1 or 2 in sublateral line on anterior abdominal segments; of 4 kinds: 7-locular pores and 5-locular pores approximately equal in numbers, 6-locular pores, and 9-locular pores uncommon. Cruciform pores near body margin of thorax. Legs without pores; each femur with 5 setae including 2 proximally and 3 distally; each tibia with 4 setae, without middle seta; hind tibia/tarsus 0.7–0.9. Antennae each 6-segmented, about 115 μm long. Frontal lobes absent. Preantennal pore present. Microtrichia from metathorax to segment VII, absent from coxae.

Notes: This description is based on six poorly stained embryos retained within the bodies of the adult females and 13 separately mounted specimens from two localities. The first-instar nymph of Ov. telotrichus is most similar to the first-instar nymphs of Ov. davesmithi and Ov. tippinsi in having five setae on each femur and nipple-shaped setae in lateral longitudinal lines. They differ as follows (character states in brackets are of Ov. telotrichus ): without enlarged setae on abdominal segment VIII or without conical setae on abdominal segment VIII (with three pairs of conical setae on segment VIII).

Figures

FIGURE 83. Ovaticoccus telotrichus sp. n., adult female, 26 km. N. Apizaco, Tlaxcala, Mexico, July 12, 1967, on unknown grass, J. Villanueva B. and D.R. Miller. A=enlarged seta; C=7-locular pore; F=microtubular duct; G=macrotubular duct; H=cruciform pore; I=anal ring; J=antenna; L=claw; T=pore with>7 loculi.

FIGURE 84. Ovaticoccus telotrichus sp. n., second-instar female, 23 miles S. Guadalajara, Jalisco, Mexico, July 3, 1972, on unknown grass, D.R. Miller and F.D. Parker.A=enlarged seta; B=slightly enlarged seta; C=7-locular pore; F=microtubular duct (shown in two views); H=cruciform pore; I=anal ring; Q=dorsal surface of coxa; T=pore with>7 loculi.

FIGURE 85. Ovaticoccus telotrichus sp. n., third-instar male (prepupa), 23 miles S. Guadalajara, Jalisco, Mexico, July 3, 1972, on unknown grass, D.R. Miller and F.D. Parker. B=slightly enlarged seta; I=anal ring; N=flagellate seta; S=6-locular pore; T=pore with>7 loculi.

FIGURE 86. Ovaticoccus telotrichus sp. n., second-instar male, 23 miles S. Guadalajara, Jalisco, Mexico, July 3, 1972, on unknown grass, D.R. Miller and F.D. Parker. A=enlarged seta; C=7-locular pore; D=5-locular pore; F=microtubular duct; G=macrotubular duct; H=cruciform pore; I=anal ring.

FIGURE 87. Ovaticoccus telotrichus sp. n., first-instar nymph (embryo), Iron Mt. Ranch, 8 miles N. Marathon, Brewster Co., Texas, USA, May 11, 1976, on unknown grass, R.D. Gordon and D.R. Miller. A=enlarged seta; C=7-locular pore; D=5-locular pore; F=microtubular duct; H=cruciform pore; L=claw; S=6-locular pore.