Calepitrimerus lutocinus, Lewandowski, Mariusz, 2006

Lewandowski, Mariusz, 2006, A new eriophyoid mite species (Acari: Eriophyoidea) on Picea abies (Pinaceae), Zootaxa 1304, pp. 61-68 : 62-67

DIAGNOSIS: Calepitrimerus lutocinus n. sp.

differs considerably from other Calepitrimerus species, mainly by the shape of its 4 th and 5 th dorsal annuli which protrude above the other annuli. Sublateral lobes present on about the first 15 annuli. The three dorsal ridges (middorsal and subdorsal ridges) begin at the fifth dorsal annulus, probably due to the different structure of the anterior dorsal annuli. The middorsal ridge ends on the 14 th, and the subdorsal ridges on about the 20 th annulus.

Among Calepitrimerus species occuring on coniferous plants some similar characteristics can be observed in C. glacialis Keifer, 1961 from Thuja plicata ( Cupressaceae ) from Montana, USA ( Keifer 1961). This species is similar to C. lutocinus n. sp. by the sculpture of the prodorsal shield, the size and pattern of genital coverflap and the length of legs. C. lutocinus n. sp. can be distinguished from C. glacialis by the shape of first five dorsal annuli, the number of dorsal annuli ( C. lutocinus n. sp. with 26 while 44 in C. glacialis ), the length of opistosomal setae (longer in C. lutocinus n. sp.) and its 5 ­rayed empodium (6 ­rayed in C. glacialis ).

FEMALE ( Figs 1 –3 , except Figs 2 ­GM and 3–6) holotype (and 10 paratypes): Body fusiform in shape. Body length 191 (160–203); width 78 (72–81). Gnathosoma 28 (27–30) long; dorsal pedipalpal genual seta d 11 (10–11) long; seta ep 4 (3–4) long; seta v 3 (2–3) long; cheliceral stylets 26 (26–29) long. Prodorsal shield 58 (57–63) long, 71 (65–81) wide, with lobe over the rostrum 10 (10–14) long, anteriorly rounded, looks like anteriorly cut. Shield design: admedian lines divide into two lines at 2 / 3 of their length and directed towards lateral margin, forming a crosslike pattern. Posterior margin of the shield covers two dorsal annuli forming tongue­like depression. Shield tubercles sc 33 (30–35) apart, ahead of rear shield margin; dorsal setae sc 6 (4–6) long, directed centrally.

Leg I 30 (28–32) long; femur 11 (9–11) long, seta bv 10 (9–10) long; genu 4 (3–5) long, seta l” 30 (26–33) long; tibia 7 (6–8) long, seta l’ 11 (8–11) long. Tarsus 6 (6–7) long, setae: ft” 24 (20–28) long, ft’ 22 (16–23) long, u’ 6 (5–6) long. Tarsal solenidion ω 8 (7–8) long curved and knobbed; tarsal empodium simple, symmetrical, 6 (6) long, 5 –rayed. Legs II 28 (26–30) long; femur 10 (7–11) long, seta bv 10 (8–10) long; genu 4 (2–4) long, seta l” 12 (8–14) long; tibia 5 (4–6) long. Tarsus 6 (6–7) long, setae: ft” 21 (19–23) long, ft’ 7 (5–8) long, u’ 6 (4–6) long. Tarsal solenidion ω 7 (6–7) long; tarsal empodium simple, 6 (6) long, 5 –rayed.

Coxal plates with a pattern of lines, sternal line distinct. Setae 1 b 6 (6–9) long, 15 (12–15) apart; setae 1a 10 (8–15) long, 12 (11–13) apart; setae 2a 46 (31–48) long, 31 (19–31) apart; distance between setae 1 a and 1 b 9 (8–10), distance between setae 1 a and 2a 9 (7–9).

Opisthosoma with 26 dorsal annuli, 71 (67–79) ventral annuli, 8 (7–8) coxogenital annuli. Microtubercles only on ventral annuli, elongated laterally to the coxo­genital annuli more rounded, more distinct. Dorsal annuli forming three longitudinal ridges; the central ridge ends with 14 th annulus and the subdorsal ridges on about the 20 th annulus. Sublateral lobes present on about the first 15 annuli. Fourth and fifth dorsal annuli of slightly different shape and wider than others.

Seta c 2 20 (12–20) long, located on 12 th (11 th– 12 th) annulus; tubercles c 2 60 (48–60) apart; ventral seta d 64 (41–63) long, located on 25 th (23 th– 29 th) annulus, tubercles d 34 (26–33) apart; seta e 35 (36–45) long, located on 43 th (40 th– 49 th) annulus, tubercles e 17 (12–15) apart; seta f 23 (18–21) long, located on 66 th (61 th– 74 th) annulus, or 6 th (6 th) annulus from rear; tubercles f 22 (17–21) apart.

Setae h 1 5 (3–5) long, 4 (4) apart; setae h 2 9 (8–9) apart.

Genitalia 18 (15–18) long, 25 (22–25) wide, genital coverflap with 4 (3–6) oblique striae; setae 3a 54 (45–62) long, 15 (14–16) apart.

MALE ( Fig. 2 ­GM and 3­6) (range of 6 specimens): body length 151–172; width 59–68. Gnathosoma 19–25 long; dorsal pedipalpal genual seta d 9–10 long; seta ep 3–4 long; seta v 2–3 long; cheliceral stylets 20–25 long. Shape and design of prodorsal shield similar to that of the female. Shield 47–51 long, 55–68 with lobe over the rostrum 10–11 long. Tubercles of setae sc 24–27 apart, ahead of rear shield margin; dorsal setae sc 4–5 long, directed centrally.

Leg I 27–29 long; femur 9–10 long, seta bv 7–10 long; genu 4 long, seta l” 20–21 long; tibia 5–7 long, seta l’ 6–10 long. Tarsus 5–7 long, setae: ft” 21–23 long, ft’ 18–21 long, u’ 5–6 long. Tarsal solenidion ω 7 long, curved and knobbed; tarsal empodium simple, symmetrical, 6 long, 5 –rayed. Legs II 24–26 long; femur 8–10 long, seta bv 6–9 long; genu 3–4 long, seta l” 7–11 long; tibia 5 long. Tarsus 5–6 long, setae: ft” 18–22 long, ft’ 5–8 long, u’ 3–4 long. Tarsal solenidion ω 6–7 long; tarsal empodium 6 long, 5 ­rayed.

Coxal plates with pattern similar to that of the female. Setae 1 b 6–8 long, 8–13 apart; setae 1a 10 – 11 long, 9–10 apart; setae 2a 27 – 35 long, 23–35 apart; distance between setae 1 b and 1a 5 – 9, distance between setae 1 a and 2a 7 – 9.

Opisthosoma similar to that of the female with 26 dorsal annuli, 62–71 ventral annuli, and 8–9 coxogenital annuli.

Seta c 2 15–21 long, located on 11 th– 14 th annulus; tubercles c 2 45–50 apart; ventral seta d 43–59 long, located on 22 nd– 26 th annulus, tubercles d 25–32 apart; seta e 26–49 long, located on 36 th– 42 nd annulus, tubercles e 10–15 apart; seta f 17–21 long, located on 58 th– 66 th annulus, or 6 th annulus from rear; tubercles f 17–21 apart.

Setae h 1 3–4 long, 4 apart; setae h 2 7–8 apart.

Genitalia 12–19 long, 20–22 wide; setae 3a 32 – 49 long, 15–17 apart.

TYPE MATERIAL: Holotype female collected from Picea abies (L.) H. Karst. in a forest located near Lutocin (52 ° 59 ' N, 19 ° 46 ' E), Mazowiecka Province, Poland, on September 23, 2005 by the author. Paratypes: 95 females and 18 males collected at the same place on September 25, 2004, May 2, 2005, July 30, 2005, August 27, 2005; September 23, 2005 by the author .

RELATION TO THE HOST PLANT: mites are vagrants on needles and stems; no obvious symptoms detected.

Figures

FIGURE 1. Calepitrimerus lutocinus n. sp. female. LM—lateral aspect; LO—lateral opisthosoma; CG—coxogenital region; IG—internal genitalia

FIGURE 2. Calepitrimerus lutocinus n. sp. female. D—dorsal aspect; L1, L2—Legs I, II, emempodium; male. GM—genital region

FIGURE 3. Calepitrimerus lutocinus n. sp. 1 and 2—SEM micrographs of the mite’s body and prodorsal shield; 3—dorsal aspect; 4—prodorsal shield; 5—coxogenital region of female; 6— coxogenital region of male.

FIGURE 2. Calepitrimerus lutocinus n. sp. female. D—dorsal aspect; L 1, L 2 — Legs I, II, emempodium; male. GM—genital region