Calepitrimerus calleryus, Ruan & Shou & Lian & Tan, 2023

Ruan, Hong-Yan, Shou, Ru-Fang, Lian, Ran-Ran & Tan, Meng-Chao, 2023, Two new species of eriophyoid mites (Acari: Prostigmata: Eriophyoidea) associated with Callerya Endl. and supplementary descriptions of Fujianacarus wisterianis from China, Zootaxa 5369 (3), pp. 413-426 : 418-421

Calepitrimerus calleryus sp. nov. ( Figures 3–4 )

http://www.zoobank.org/ urn:lsid:zoobank.org:act:2CE3E048-7DBA-4178-A529-97B4D1FE388E

Description. Female (n=9). Body fusiform, 149 (146–161) including gnathothoma, 44 (43–48) wide, 42 (41–45) thick, white in colour. Gnathosoma 22 (18–22) curved downwards, cheliceral stylets 18 (18–21), seta ep 2 (2–3), setae d 4 (3–4), unbranched, setae v 2 (1–2). Prodorsal shield 35 (35–39) including the frontal lobe, 45 (43–46) wide. Frontal lobe broad, 6 (6–8). Median line present on about posterior half of the shield, abmedian lines present on the anterior ⅓ of the shield, submedian lines present on about anterior half of the shield, some short dashes and microtubercles on lateral sides of shield. Scapular tubercles ahead of rear shield margin, setae sc 6 (6–7), 15 (14–16) apart. Coxal plates with granules; setae 1b 6 (6–8), 11 (10–12) apart; setae 1a 16 (16–19), 8 (7–9) apart, setae 2a 18 (17–21), 20 (20–23) apart. Coxigenital region with 5 (4–5) semiannuli between coxae and genitalia. Leg I 24 (23–25); trochanter 3 (2–3), femur 8 (8–9), setae bv 15 (12–16); genu 3 (3–4), setae l ″ 17 (15–18); tibia 4 (3–4), setae l ′ 10 (9–10), located at basal ½; tarsus 5 (4–5), setae ft ′ 17 (16–21), setae ft ″ 18 (18–21), setae u’ 3 (3–4); tarsal solenidion ω 6 (6–7), curved down, knobbed; tarsal empodium 5 (5–6), 5-rayed. Leg II 23 (22–25); trochanter 3 (2–3), femur 7 (7–8), setae bv 14 (14–16); genu 3 (3–4), setae l ″ 11 (10–13); tibia 4 (4–5); tarsus 5 (4–5), setae ft ′ 4 (4–5), setae ft ″ 18 (17–20), setae u’ 4 (4–5); tarsal solenidion ω 5 (5–6), curved down, knobbed; tarsal empodium 5 (4–6), 5-rayed. Opisthosoma dorsally with 55 (55–58) dorsal semiannuli, with three ridges, middorsal ridge shorter than lateral ridges, ending in a broad furrow, with elliptical microtubercles on ridges and lateral annuli; 74 (70–74) ventral semiannuli, with rounded microtubercles close to the rear margins of annuli, except posterior 16 (16–18) annuli with elongated and linear microtubercles. Setae c2 26 (22–26), 38 (37–39) apart, on ventral semiannulus 10 (9–10); setae d 26 (25–28), 30 (30–33) apart, on ventral semiannulus 21 (21–23); setae e 20 (18–22), 13 (13–15) apart, on ventral semiannulus 44 (43–44); setae f 16 (15–17), 14 (13–15) apart, on 7 th ventral annulus from rear; setae h1 3 (2–3), setae h2 58 (53–62), 8 (7–8) apart. External genitalia 11 (11–13), 17 (17–20) wide, coverflap anteriorly with granulated lines, posteriorly with 11 (10–12) longitudinal striae; setae 3a 17 (16–19), 14 (13–14) apart. Internal genitalia, anterior genital apodeme trapezoidal, smooth; spermathecae subspherical, oriented laterad; spermathecal tubes relatively short, as long as ⅓ of spermathecal length.

Male (n=2). Similar in shape and prodorsal shield arrangement to female. Body 143–157 including gnathothoma, 40–43 wide, whitish in color. Gnathosoma 14–16 curved down, cheliceral stylets 16. Prodorsal shield 37–40, 36–38 wide. Scapular tubercles ahead of rear shield margin, setae sc 4–5, 13–14 apart. Coxae, setae 1b 5, 7–8 apart; setae 1a 14, 5–6 apart; setae 2a 21–24, 16–18 apart. Leg I 21–24; femur 8–9, setae bv 8–10; genu 3–4, setae l ″ 16–18, tibia 5, setae l ′ 5; tarsus 4–5, setae ft ′ 12–15, setae ft ″ 15–18, setae u’ 5; tarsal solenidion ω 6, tarsal empodium 5–6, 5-rayed. Leg II 20–24; femur 7–8, setae bv 8; genu 3, setae l ″ 11–12, tibia 4; tarsus 5; setae ft ′ 4–5, setae ft ″ 18–20, setae u’ 3; tarsal solenidion ω 6–7, tarsal empodium 4–5, 5-rayed. Opisthosoma, 56–58 dorsal semiannuli; 70–72 ventral semiannuli. Setae c2 29–31, 31 apart, on ventral semiannulus 11; setae d 34–37, 21–23 apart, on ventral semiannulus 23; setae e 15–18, 10–12 apart, on ventral semiannulus 41; setae f 16–19, 12–14 apart, on 7 th ventral annulus from rear; setae h1 1–2, setae h2 43–47, 7 apart. Genitalia 10–12 long, 15–17 wide; setae 3a 16–18, 12 apart.

Type material. Holotype: female (slide number EPC5-1.1, marked Holotype), Jinzhongshan National Nature Reserve , Baise City, Guangxi Zhuang Autonomous Region, China (24°36′07′′N, 104°52′37′′E, elevation 1000 m), 3 May 2021, from Callerya tsui (F. P. Metcalf) Z. Wei & Pedley (Leguminosae) . Coll. Mengchao Tan, Liangxin Liu and Ankang Lv. Paratypes: ten females and two males (slide numbers EPC5-1.2~1.11), same data as holotype .

Host plant. Callerya tsui (F. P. Metcalf) Z. Wei & Pedley (Leguminosae) .

Relation to host. The mite is a vagrant on the undersurfaces of leaves and causes no visible damage.

Etymology. The specific designation calleryus is from the generic name of the host, Callerya ; feminine in gender.

Differential diagnosis. Calepitrimerus calleryus sp. nov. appears to be morphologically close to Calepitrimerus maximowiczii Xue, Guo & Hong, 2013 which was found on Crataegus maximowiczii Schneid. ( Rosaceae ) from Heilongjiang Province, P.R. China. They have some similarities in terms of coxal plates with granules, prodorsal shield with many granules at lateral edges, anterior shield lobe broad, lateral annuli with microtubercles, setae h1 present. However, C. calleryus sp. nov. can be differentiated from C. maximowiczii by the number of the empodium rays (5 in C. calleryus sp. nov. and 4 in C. maximowiczii ), the ornamentation of the coverflap (coverflap anteriorly with granulated lines, posteriorly with 10–12 longitudinal striae in C. calleryus sp. nov. and coverflap with 12– 16 longitudinal ridges in C. maximowiczii ), dorsal semiannuli (55–58 in C. calleryus sp. nov. and 49–52 in C. maximowiczii ), ventral semiannuli (70–74 in C. calleryus sp. nov. and 63–66 in C.maximowiczii ), the length of ventral setae d (25–28 in C. calleryus sp. nov. and 38–53 in C. maximowiczii ). Besides, Calepitrimerus cariniferus Keifer, 1938 , which was collected from Artemisia douglasiana Besser ( Asteraceae ), appears to be morphologically close to C. calleryus sp. nov. similar number of empodium rays (4-rayed), the dorsal annuli with elliptical microtubercles on ridges and lateral annuli, ventral semiannuli (70–74), setae h1 present. The new species can be differentiated by the ornamentation of the coxae (coxal plates with granules in C. calleryus sp. nov. and smooth in C. cariniferus ), the ornamentation of the coverflap (coverflap anteriorly with granulated lines, posteriorly with 10–12 longitudinal striae in C. calleryus sp. nov. and coverflap with 8–10 longitudinal ridges in C. cariniferus ), median line of the prodorsal shield (present in C. calleryus sp. nov. and absent in C. cariniferus ), the length of ventral setae d (25–28 in C. calleryus sp. nov. and 46 in C. cariniferus ).

Figures

FIGURE 3. Line drawings of Calepitrimerus calleryus sp. nov.: CGF. Coxigenital region of female; D. Dorsal view of female; em. Empodium; GM. Male genital region; IG. Female internal genitalia; L. Lateral view of female; L1. Leg I; L2. Leg II. Scale bar: 50 μm for L; 45 μm for D; 25 μm for CGF; 25 μm for GM, L1, L2; 10 μm for em.

FIGURE 4. Images of Calepitrimerus calleryus sp. nov.: A. Lateral view of female; B. Prodorsal shield of female; C. Coxigenital region of female; D. Coxigenital region of male; E. Dorsal view of posterio-dorsal; F. Empodium; G. Internal female genitalia. Scale bar: 20 μm for A; 10 μm for B, C, D, E, G; 5 μm for F.