Scymnus (Scymnus)
publication ID |
https://doi.org/ 10.1649/0010-065X(2000)054[0154:LBCCFC]2.0.CO;2 |
DOI |
https://doi.org/10.5281/zenodo.5460963 |
persistent identifier |
https://treatment.plazi.org/id/03CBC825-FFD7-FFCB-FE0E-8A67FBA0FC22 |
treatment provided by |
Tatiana |
scientific name |
Scymnus (Scymnus) |
status |
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Key to Species of Scymnus (Scymnus) of China
1 Pronotum light without any dark marking ------------------------------------------------------- 2
1′ Pronotum black, or with anterior margin light, or pronotum light with black marking at base ---------------------------------------------------------------------------------------------- 8
2 Elytra yellow with Mshaped dark brown base; body length 1.8 to 2.3 mm ----------------------------------------------------------------------------- S. (Pullus) centralis Kamiya
2′ Elytra black, or with lighter apex ------------------------------------------------------------------------ 3
3 Elytra entirely black; body length 2.0 to 2.2 mm -------------------------------------------- --------------------------------------------------------------------------------- S. scapanulus Pang and Haung
3′ Elytra black with lighter apex ------------------------------------------------------------------------------- 4
4 Elytra black with less than 1/7 of apex lighter in color ----------------------------- 5
4′ Elytra black with more than 1/5 of apex lighter in color -------------------------- 6
5 Elytral apex and pronotum yellow; length of first abdominal sternum distinctly short, less than 1/4 width; postcoxal line incomplete, smooth arc; area enclosed by line finely punctate; body length 2.2 to 2.5 mm. ---------- ----------------------------------------------------------------------------------- S. notidanus Pang and Huang
5′ Elytral apex and pronotum brown, length of first abdominal sternum normal, about 1/3 width; postcoxal line complete, but last 1/3 weak, intermittent, tortuous; area enclosed by line with both fine and coarse punctutres; body length 2.4–2.7 mm ---------------------------------------- S. kabakovi Hoang
6 Prosternum with broad intercoxal carinae, length less than 2 times width at base; first three abdominal sterna with punctures on lateral area distinctly finer than on medial area; length 2.5 mm ---------- S. grammicus Yu
6′ Prosternum with narrow intercoxal carinae, length more than 2.4 times width at base; first three abdominal sterna with punctures similar on lateral and medial areas ------------------------------------------------------------------------------------------------ 7
7 First abdominal sternum with area enclosed by postcoxal line finely punctate and a few gross punctures, lateral sides coarsely punctate; tarsal claws short, 1/2 or less length of fourth tarsal segment; body length 1.8 to 2.3 mm ----------------------------------------------------------------------------- S. (Pullus) centralis Kamiya
7′ First abdominal sternum with lateral sides and area enclosed by postcoxal line finely punctate; tarsal claws very long, 2/3 length of fourth tarsal segment; body length 1.9 to 2.1 mm ------- S. dolichonychus Yu and Pang
8 Elytron black with one or two large lateral brownish spots, which may connect to sutural line, and a lighter apex ------------------------------------------------------- 9
8′ Elytra not as above, if with light spots, then spots very small ------------- 11
9 Pronotum brown with base black; body broadly oval, length 2.5 to 2.7 mm --------------------------------------------------------------------- S. manipulus Fürsch and Kreissl
9′ Pronotum black with anteriolateral margin narrowly brown; body oval ------------------------------------------------------------------------------------------------------------------------------------------ 10
10 Elytron with one or two wellseparated brown spots; median piece of tegmen distinctly thick at base; body length 2.8 to 3.0 mm ----------------------- ----------------------------------------------------------------------------------------------------- S. frontalis Fabricius
10′ Elytron with two brown spots, often joined; median piece of tegmen not distinctly thicker at base; body length 2.1 to 3.0 mm ------------------------------------ ------------------------------------------------------------------------------------------------ S. inderihensis Mulsant
11 Elytra light in color, with darker suture, lateral sides may also be dark; body length 2.2 mm --------------------------------------------------- S. nigrosuturalis Kamiya
11′ Elytra black, may have lighter apex or small brown spots --------------------- 12
12 Elytron with distinct rows of gross punctures forming sutural striae -- 13
12′ Elytron without distinct rows of gross punctures forming sutural striae ------------------------------------------------------------------------------------------------------------------------------------------ 15
13 Elytra entirely black without brown apex; body length 2.8 mm. -------------- -------------------------------------------------------------------------------------------------------- S. orientalis Mader
13′ Elytra black with brown apex ----------------------------------------------------------------------------- 14
14 Pronotum brown with base black; body length 1.9 to 2.2 mm. ----------------- ----------------------------------------------------------------------------------------------------- S. longmenicus Pang
14′ Pronotum black with narrow anteriolateral margin light ------------------------ 15
15 Hind margin of fifth abdominal sternum distinctly emarginate in male; prosternum with parallel intercoxal carinae; body length 2.1 to 2.4 mm -------------------------------------------------------------------------------------- S. apiciflavus (Motschulsky)
15′ Hind margin of fifth abdominal sternum slightly emarginate in male; prosternal carinae distinctly convergent anteriorly; body length 2.1 to 2.2 mm ---------------------------------------------------------------------------------- S. dissolobus Pang and Huang
16 Elytral punctures nearly equal to those on pronotum -------------------------------- 17
16′ Elytral punctures much coarser than those on pronotum ------------------------- 19
17 Pronotum and elytra entirely black, area surrounded by postcoxal line finely punctate at anterior half and smooth at posterior half; body large, length 3.8 mm ----------------------------------------------- S. decemmaculatus Yu and Pang
17′ Pronotum yellow and subtriangular black spot at base; elytra black with apex dark brown; area surrounded by postcoxal line coarsely punctate ------------------------------------------------------------------------------------------------------------------------------------------ 18
18 First abdominal sternum widely smooth along postcoxal line, medial area with finer punctures than lateral area; body length 2.0 to 2.7 mm ------------ -------------------------------------------------------------------------------------------------------------- S. bifurcatus Yu
18′ First abdominal sternum narrowly smooth along postcoxal line, medial area with punctures similar to lateral area; body length 1.9 to 2.1 mm ------------------------------------------------------------------------------------------------------------ S. crinitus Fürsch
19 Elytra entirely black ------------------------------------------------------------------------------------------------ 23
19′ Elytra black with lighter apex, may have spots ------------------------------------------- 20
20 Elytra black with apical 1/6 or more brown ------------------------------------------------- 21
20′ Elytra black with narrow brown margin at apex, distinctly less than 1/6 elytral length -------------------------------------------------------------------------------------------------------------- 22
21 Elytron black often with 3 brown spots, but spots may be merged or missing; apical 1/3 of elytra brown, margin with black strongly arched; body length 2.2 to 2.5 mm. ---------------------------------------------------- S. najaformis Yu
21′ Elytron black without any spots; apical 1/6 brown, margin with black sinuous; body length 2.8 mm ----------------------- S. unciformis Yu , new species
22 Apex of sipho with a hookshaped appendix; body length 2.2 to 2.5 mm. ------------------------------------------------------------------------------------------------------ S. folchinii Canepari
22′ Apex of sipho contracted at preapex, without distinct appendix; body length 2.1 to 2.3 mm --------------------------------------------- S. axinoides Ren and Pang
23 Pronotum black except for lighter anterior corners and lateral margins; body length 2.0 mm ------------------------------------- S. paracrinitus Yu , new species
23′ Pronotum yellow or brown with a black, triangular basal marking ----- 24
24 Postcoxal line of first abdominal sternum strongly arched; middle of sipho smooth without appendix; body length 2.0 to 2.2 mm. --------------------------------- --------------------------------------------------------------------------------- S. scapanulus Pang and Huang
24′ Postcoxal line of first abdominal sternum extending to lateral side evenly; middle of sipho with two finshaped appendices; body length 2.4 to 2.6 mm --------------------------------------------------------------------------- S. dipterydicus Ren and Pang
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