Monoctenus, Dahlbom, 1835
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publication ID |
https://doi.org/ 10.11646/zootaxa.5380.6.3 |
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publication LSID |
lsid:zoobank.org:pub:AA915DFA-58B9-428D-AF5D-193E3295AB04 |
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DOI |
https://doi.org/10.5281/zenodo.10259698 |
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persistent identifier |
https://treatment.plazi.org/id/03B38786-FF95-CD5A-FF21-FB7AFA7255B1 |
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treatment provided by |
Plazi |
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scientific name |
Monoctenus |
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Key to Japanese species of Monoctenus
1 Female ............................................................................................. 2
- Male................................................................................................ 8
2(1) Mesonotum entirely black ( Fig. 2A View FIGURE 2 1). Femora mostly black ( Fig. 2B View FIGURE 2 1). Valvula 3 in dorsal view not tapering, apically slightly concave ( Fig. 2C View FIGURE 2 1), in lateral view apically truncate ( Fig. 2D View FIGURE 2 1) (condition in M. kondoi unknown)..................... 3
- Mesonotum widely red yellow anteriorly ( Fig. 2A2 View FIGURE 2 ). Femora entirely yellow ( Fig. 2B2 View FIGURE 2 ). Valvula 3 in dorsal view tapering, apically pointed or narrowly rounded ( Fig. 2C2 View FIGURE 2 ), in lateral view narrowly rounded ( Fig. 2D2 View FIGURE 2 )......................... 5
3(2) Abdomen with middle laterotergites yellow ( Fig. 3A View FIGURE 3 1 View FIGURE 1 ). Pronotum with posterodorsal corner widely yellow ( Fig. 3B View FIGURE 3 1 View FIGURE 1 ). Trochanters and their surroundings yellow ( Fig. 3A View FIGURE 3 1 View FIGURE 1 ). Lancet with rounded apex ( Fig. 3C View FIGURE 3 1 View FIGURE 1 )...................... M. kondoi
- Abdomen with laterotergites black, at most basal laterotergites partly yellow ( Fig. 3A View FIGURE 3 2 View FIGURE 2 ). Pronotum with posterodorsal corner narrowly yellow or brown ( Fig. 3B View FIGURE 3 2a View FIGURE 2 ), or entirely black ( Fig. 3B View FIGURE 3 2b View FIGURE 2 ). Trochanters and their surroundings mostly black ( Fig. 3A View FIGURE 3 2 View FIGURE 2 ). Lancet with acute apex ( Fig. 3C View FIGURE 3 2 View FIGURE 2 )................................................................... 4
4(3) Antenna with 19–20 antennomeres; serration deep and flagellomere 6 in lateral view with breadth including serration 1.5–1.8 × dorsal length ( Fig. 4A View FIGURE 4 1 View FIGURE 1 ).................................................................... M. nipponicus
- Antenna with 18 antennomeres; serration relatively shallow and flagellomere 6 in lateral view with breadth including serration 1.1–1.4 × dorsal length ( Fig. 4A View FIGURE 4 2 View FIGURE 2 )................................................... M. obscuratus hokkaidonis
5(2) Abdomen with laterotergites mostly yellow ( Fig. 5A View FIGURE 5 1 View FIGURE 1 ). Mesepisternum entirely black ( Fig. 5A View FIGURE 5 1 View FIGURE 1 ). Lancet with ctenidia of annuli 1and 2 parallel and inclined anteriorly ( Fig. 5B View FIGURE 5 ).................................................... M. decoratus
- Abdomen with laterotergites black ( Fig. 5A View FIGURE 5 2a, A2b View FIGURE 2 ), sometimes some laterotergites partly yellow ( Fig. 5A View FIGURE 5 2c View FIGURE 2 ). Mesepisternum entirely black ( Fig. 5A View FIGURE 5 2a View FIGURE 2 ) or partly pale ( Fig. 5A View FIGURE 5 2b, A2c View FIGURE 2 ). Lancet with ctenidia of annuli 1and 2 as above or not as above. .. 6
6(5) Mesepisternum centrally with one or two small brown spots ( Fig. 6A View FIGURE 6 1 View FIGURE 1 ). Lancet with ctenidia of annuli 1and 2 parallel and inclined anteriorly ( Fig. 6B View FIGURE 6 1 View FIGURE 1 )................................................................ M. cryptomeriae
- Mesepisternum entirely black ( Fig. 6A View FIGURE 6 2a View FIGURE 2 ) or ventrally red yellow ( Fig. 6A View FIGURE 6 2b View FIGURE 2 ). Lancet with ctenidia of annuli 1and 2 converging dorsally ( Fig. 6B View FIGURE 6 2a View FIGURE 2 ) or parallel and inclined posteriorly ( Fig. 6B View FIGURE 6 2b View FIGURE 2 )............................................. 7
7(6) Antenna with 19–21 antennomeres ( Fig. 7A View FIGURE 7 1 View FIGURE 1 ); flagellomere 6 with breadth including serration 1.8–2.1 × dorsal length. Lancet with ctenidia of annuli 1 and 2 converging dorsally and ctenidium of annulus 2 inclined anteriorly ( Fig. 7B View FIGURE 7 1 View FIGURE 1 )........ M. itoi
- Antenna with 15–17 antennomeres ( Fig. 7A View FIGURE 7 2 View FIGURE 2 ); flagellomere 6 with breadth including serration 1.1–1.5 × dorsal length. Lancet with ctenidia of annuli 1 and 2 parallel and ctenidium of annulus 2 inclined posteriorly ( Fig. 7B View FIGURE 7 2 View FIGURE 2 )............ M. fujisanus
8(1) Trochanters and femora mostly black ( Fig. 8A View FIGURE 8 1 View FIGURE 1 ). Penis valve with paravalva nearly straight on ventral edge, and inner sclerite broad and broadest near middle ( Fig. 8B View FIGURE 8 1 View FIGURE 1 )................................................................. 9
- Trochanters and femora yellow ( Fig. 8A View FIGURE 8 2 View FIGURE 2 ). Penis valve with paravalva roundly convex on ventral edge, and inner sclerite narrow and broadest near apex ( Fig. 8B View FIGURE 8 2 View FIGURE 2 ).................................................................... 10
9(8) Antenna with 24–26 rami (27–29 antennomeres). Penis valve with valviceps 2.5–2.7 × as long as broad ( Fig. 9A View FIGURE 9 1 View FIGURE 1 )...................................................................................... M. kondoi or M. nipponicus
- Antenna with 23–24 rami (26–27 antennomeres). Penis valve with valviceps 3.2–3.5 × as long as broad ( Fig. 9A View FIGURE 9 2 View FIGURE 2 )....................................................................................... M. obscuratus hokkaidonis
10(8) Labrum yellow brown or brown ( Fig. 10A View FIGURE 10 1 View FIGURE 1 ). Pronotum yellow posterolaterally. Antenna with 23–25 rami (26–28 antennomeres)................................................................................. M. cryptomeriae
- Labrum dark brown or black ( Fig. 10A View FIGURE 10 2a, b View FIGURE 2 ). Pronotum and antenna often not as above............................. 11
11(10) Pronotum entirely black ( Fig. 11A View FIGURE 11 1a View FIGURE 1 ), often narrowly brown posterolaterally ( Fig. 11A View FIGURE 11 1b View FIGURE 1 ). Antenna with 25–30 rami (28–33 antennomeres)................................................................................... M. itoi
- Pronotum narrowly or widely yellow posterolaterally ( Fig. 11A View FIGURE 11 2a, b View FIGURE 2 ). Antenna with 25–27 rami (27–30 antennomeres)................................................................................. M. decoratus or M. fujisanus
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