Abacarus longilobus, Skoracka, Anna, 2002
publication ID |
https://doi.org/ 10.5281/zenodo.156097 |
DOI |
https://doi.org/10.5281/zenodo.6278147 |
persistent identifier |
https://treatment.plazi.org/id/0397CA3A-4E3A-FFC4-FEBE-FC62FC59FADC |
treatment provided by |
Plazi |
scientific name |
Abacarus longilobus |
status |
sp. nov. |
Abacarus longilobus n. sp.
Description: Female ( Figs 34 View FIGURE 3 View FIGURE 4 ) (holotype and 9 paratypes): body length 238 (185296), width 62 (5767), body spindleform. Dorsomedian ridge narrow, ending near 16th dorsal annulus from end, dorsal furrow and lateral ridges ending near 67th annulus from end. Gnathosoma 25 (2230) long; dorsal pedipalpal genual setae d 11 (1012) long; v setae (sensory peg) 3 (23) long; ep setae 2 (23) long, chelicerae 22 (1923) long, almost straight. Prodorsal shield elongatetriangular, 53 (4757), long; 47 (4452) wide, with pronounced, elongated frontal lobe over gnathosoma, 17 long. Sculpture of prodorsal shield: median line absent; admedian lines present only on posterior half of shield, parallel to each other; submedian lines entire only on anterior 1/3 and posterior 1/6 part of shield, parallel to lateral margins of shield. Distinct, conical microtubercles present on surface near shield. Tubercles of setae sc located on rear margin of shield, 2 (23) long, 3 (34) wide, 31 (27 31) apart; setae sc 13 (812) long, projecting to rear.
Leg I 40 (3646) long; femur 10 (1011) long, with seta bv 15 (1215) long; position of seta bv 4 (4) from ventral, proximal margin of femur; genu 6 (67) long, with seta l’’ 26 (2230) long, position of seta l’’ 4 (4) from dorsal, proximal margin of genu; tibia 8 (89) long, with seta l’ 10 (1011) long; position of seta l’ 5 (45) from ventral, proximal margin of tibia. Tarsus 8 (89) long, with three setae: ft’’ 30 (2530) long; ft’ 28 (2127) long, u’ 7 (57) long; tarsal solenidion 10 (910) long; tarsal empodium simple, 8 (89)rayed, symmetrical, 10 (1012) long.
Leg II 40 (3641) long; femur 11 (1012) long, with seta bv 21 (1720) long; position of seta bv 5 (45) from ventral, proximal margin of femur; genu 5 (56) long, with seta l’’ 12 (1217) long; position of seta l’’ 3 (34) from dorsal, proximal margin of genu; tibia 7 (67) long. Tarsus 8 (89) long, with three setae: ft’’ 28 (2227) long, ft’ 12 (1014) long, u’ 6 (67) long; tarsal solenidion 10 (1011) long; tarsal empodium 8 (89)rayed, symmetrical, 10 (1012) long.
Coxae with a pattern of numerous lines and dashes, some lines with microtubercles; slender sternal line present. Setae 1b 10 (1012) apart, 11 (1113) long; setae 1a 9 (79) apart, 29 (2428) long; setae 2a 25 (2227) apart, 53 (4652) long; distance between setae 1b and 1a 7 (78), distance between setae 1a and 2a 9 (810).
Opisthosoma with 73 (6674) dorsal annuli, 78 (6881) ventral annuli, 6 (57) coxogenital annuli. Annuli with microtubercles; ventral microtubercles minute, conical and pointed, from level of setae f elongated; microtuberles on dorsal annuli beadlike, present only on ridges.
Setae c2 47 (3848) long, located on 10th (8th–10th) ventral annulus from coxae II; tubercles c2 63 (4864) apart; ventral setae d 67 (4367) long, located on 26th (21st–28th) ventral annulus; tubercles d 36 (3340) apart; setae e 48 (3046) long, located on 47th (40th–48th) ventral annulus; tubercles e 13 (1116) apart; setae f 40 (2538) long, located on 74th (64th–77th) ventral annulus, 5th (5th) annulus from rear; tubercles f 25 (2325) apart. Setae h1 5 (56) long, 8 (68) apart; setae h2 83 (7298) long, 13 (1113) apart; distance between h1 and h2 – 2 (23).
Genital parts 17 (1619) long, 24 (2327) wide, genital coverflap with 11 (1012) longitudinal striae; setae 3a 40 (3043) long, 14 (1317) apart.
Male ( Fig. 5 View FIGURE 5 ) (10 specimens): body length 178221; body width 4660, spindleform; dorsomedian ridge shorter than in female. Gnathosoma 1726 long; dorsal pedipalpal genual seta d 810 long; v setae (sensory peg) 2 long; ep setae 23 long chelicerae 1423 long, almost straight. Prodorsal shield elongatetriangular, 4649 long; 3846 wide, with pronounced, elongate frontal lobe over gnathosoma, which is shorter than those in female; pattern of shield similar to that of a female. Tubercles of setae sc located on the rear margin of shield, 23 long, 3 wide, 2430 apart; setae sc 911 long, projecting to rear.
Leg I 32 37 long; femur 810 long, with seta bv 814 long; position of seta bv 34 from ventral, proximal margin of femur; genu 56 long, with seta l’’ 2029 long; position of seta l’’ 34 from dorsal, proximal margin of genu; tibia 68 long, with seta l’ 810 long; position of seta l’ 35 from ventral, proximal margin of tibia. Tarsus 78 long, with three setae: ft’’ 2229 long, ft’ 1823 long, u’ 57 long; tarsal solenidion 810 long; tarsal empodium simple, 78rayed, symmetrical, 911 long.
Leg II 3135 long; femur 910 long, with seta bv 1518 long; position of seta bv 35 from ventral proximal margin of femur; genu 45 long, with seta l’’ 1015 long; position of seta l’’ 23 from dorsal, proximal margin of genu; tibia 57 long. Tarsus 7 long, with three setae: ft’’ 2128 long, ft’ 1012 long, u’ 57 long; tarsal solenidion 810 long; tarsal empodium 78rayed, symmetrical, 910 long.
Coxae with a pattern of lines and microtubercles on coxae I, dashes on coxae II. Setae 1b 910 apart, 710 long; setae 1a 69 apart, 1929 long; setae 2a 1921 apart, 4052 long; distance between setae 1b and 1a 68, distance between setae 1a and 2a 79.
Opisthosoma with 5765 dorsal annuli, 5869 ventral annuli, 57 coxogenital annuli. Annuli with microtubercles; dorsal microtubercels similar to that of female; ventral microtubercles tiny, conical, pointed.
Setae c2 3646 long, located on 7th9th ventral annulus from coxae II; tubercles c2 45 51 apart; ventral setae d 6267 long, located on 18th22nd ventral annulus; tubercles d 26 29 apart; setae e 2440 long, located on 33rd38th ventral annulus; tubercles e 1014 apart; setae f 2741 long, located on 54th65th ventral annulus, 5th annulus from rear; tubercles f 1924 apart. Setae h1 45 long, 67 apart; setae h2 6781 long, 1011 apart; distance between h1 and h2 – 2. Genital parts 1417 long, 1921 wide; setae 3a 2632 long, 1417 apart; granulated.
Nymph ( Fig. 6 View FIGURE 6 ) (6 specimens): body length 162206; body width 4460; spindleform. Dorsomedial ridge slender, ending near 67th annulus from end. Gnathosoma 1626 long; dorsal pedipalpal genual seta d 68 long; v setae (sensory peg) 2 long; ep setae 3 long; chelicerae 1720. Prodorsal shield with a elongated lobe over base of chelicerae; shield triangular, its posterior margin bowed; 3741 long, 3544 wide. Sculpture of prodorsal shield: median line absent; admedian lines parallel to each other near; submedian lines parallel to lateral margins of shield. Conical microtubercles present on surface near shield. Tubercles of setae sc 23 long, 24 wide, located on rear margin of shield, 2226 apart; setae sc 710 long.
Leg I 2735 long; femur 69 long, with seta bv 79 long; position of seta bv 34 from ventral, proximal margin of femur; genu 45 long, with seta l’’ 1825 long; position of seta l’’ 23 from dorsal, proximal margin of genu; tibia 56 long, with seta l’ 710 long; position of seta l’ 2.53 from ventral, proximal margin of tibia. Tarsus 56 long, with three setae: ft’’ 1823 long; ft’ 1418 long, u’ 46 long; tarsal solenidion 68 long; tarsal empodium simple, 67rayed, symmetrical, 79 long.
Leg II 2332 long; femur 68 long, with seta bv 1113 long; position of seta bv 34 from ventral, proximal margin of femur; genu 45 long, with seta l’’ 810 long; position of seta l’’ 23 from dorsal, proximal margin of genu; tibia 34 long. Tarsus 56 long, with three setae: ft’’ 1720 long, ft’ 78 long, u’ 46 long; tarsal solenidion 69 long; tarsal empodium 67rayed, symmetrical, 79 long.
Coxae with a pattern of short, slender lines and conical microtubercles. Setae 1b 911 apart, 6 long; setae 1a 78 apart; setae 2a 2024 apart, 3035 long; distance between setae 1b and 1a 68, distance between setae 1a and 2a 78.
Opisthosoma with 4764 dorsal annuli, 4560 ventral annuli, 78 coxogenital annuli. Annuli with microtubercles; dorsal microtubercles sparse on ridge, beadlike, near ridge conical, pointed; ventral microtubercles conical, larger than dorsal.
Setae c 2 2432 long, located on 6th 9th ventral annulus from coxae II; tubercles c2 40 54 apart; ventral setae d 2938 long, located on 15th–21st ventral annulus; tubercles d 2532 apart; setae e 1025 long, located on 2636 ventral annulus; tubercles e 1116 apart; setae f 1927 long, located on 41st 56th ventral annulus, 5th annulus from rear; tubercles f 1822 apart. Setae h1 24 long, 56 apart; setae h 2 910 apart; distance between h1 and h2 – 2. Setae 3a 813 long, 810 apart.
Larva not seen.
Etymology: the specific designation is derived from the combination of words: longus (Latin) – long and lobus, because of the very long lobe of the prodorsal shield over the gnathosoma in this species.
Host plant: Bromus inermis Leyss. (Poaceae) .
Relation to host plant: mites are vagrants on both leaf surfaces.
Type locality: Poland, Poznañ, Cytadela (16° 56' E; 52° 25' N); scarp, southern exposition; 20.06.1999; leg. A. Skoracka.
Material examined: holotype female (ABALON248F7), 20 female partypes (ABA LON248F16, ABALON248F819), 14 males (ABALON248M114), 17 nymphs (ABA LON248N117).
Differential diagnosis: The new species is most similar to Abacarus stadelbacheri Petanovic, 1993 (from Geranium dissectum L., Geraniaceae , Italy) by the shape of the lobe over the gnathosoma, coxae ornamentation and appearance of dorsal microtubercles. Both species have similar numbers of annuli: dorsal (72 in A. stadelbacheri , 73 in A. longilobus ) and ventral (80 in A. stadelbacheri , 78 in A. longilobus ), width of genitalia (24 in both species) and distance between 3a setae (14 in both species).
A. longilobus can be distinguished from A stadelbacheri by the sculpture of the prodorsal shield and length of the dorsomedian ridge. In A. stadelbacheri on the prodorsal shield are long admedian lines and the dorsomedian ridge is ending near ½ of the opisthosoma. In A. longilobus dorsomedian ridge is longer, the admedian lines are present only on the posterior part of the shield, and the submedian lines are also present. Besides, those two species differ in the width of the prodorsal shield (56 in A. stadelbacheri , 47 in A. longilobus ), numbers of empodial rays (7 in A. stadelbacheri , 8 in A. longilobus ), length of opisthosomal setae d: (38 in A. stadelbacheri , 67 in A. longilobus ), e (16 in A. stadelbacheri , 48 in A. longilobus ), f (25 in A. stadelbacheri , 40 in A. longilobus ), 3a (19 in A. stadelbacheri , 40 in A. longilobus ).
Notice: This species was also found on three other Poaceae species: Agropyron repens (L.) P. B., Arrhenantherum elatius (L.) P. Beauv. ex J. Presl & C. and Bromus erectus Huds. The greatest intensity of its infestation was on B. inermis – 49.6 (n = 7; 95% CI: 20.7 – 101.3) and on A. elatius – 44.5 (n = 8; 18.5 – 97.0) specimens per stem. On other plants the mean number of specimens per stem was considerable lower: on A. repens – 7.3 (n = 13; 2.0 – 20.3), on B. erectus – 10.8 (n = 10; 3.6 – 28.9).
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