Picrotini
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publication ID |
https://doi.org/ 10.37520/aemnp.2022.006 |
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publication LSID |
lsid:zoobank.org:pub:42A5070B-F287-4B14-84A1-A57F7E274CE6 |
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persistent identifier |
https://treatment.plazi.org/id/03B2F470-DB7A-5578-D059-F9CCA596F7F4 |
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treatment provided by |
Felipe |
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scientific name |
Picrotini |
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Key to genera of Picrotini
1 Elytra with punctures arranged into distinct rows ( Fig. 66 View Figs 64–72 ); New Guinea. ... Papuacryptus gen. nov.
– Elytral punctation confused; not in New Guinea. .............................................................. 2
2(1) Pronotal lateral bead about as wide as antennal club; New Zealand. ............ Picrotus Sharp, 1886
– Pronotal lateral bead normal, not nearly as wide as antennal club. ..................................................... 3
3(2) All abdominal ventrites connate; New Zealand. .. ................................... Connatocryptus gen. nov.
– Abdominal ventrites 1 and 2 connate ( Fig. 96 View Figs 95–97 ), or all ventrites free ( Fig. 95 View Figs 95–97 ). ................................. 4
4(3) Abdominal ventrites 1 and 2 connate ( Fig. 96 View Figs 95–97 ); without knob-like structures at the anterior pronotal angles; Australia. ................................. 5
– No abdominal ventrites connate ( Fig. 95 View Figs 95–97 ), or if ventrites 1 and 2 connate ( Ostreacryptus helmsi ), with prominent knob-like structures at the anterior pronotal angles ( Figs 58 View Figs 55–63 , 87 View Figs 82–89 ). ............................ 7
5(4) Antennal club of 2 antennomeres ( Fig. 80 View Figs 77–81 ); gena with broad antennal groove. ................................. ........................................ Paragnetaria gen. nov.
– Antennal club of 3 antennomeres; gena without antennal groove. ................................................. 6
6(5) Anterior angles of pronotum sharp, right-angled ( Figs 9–11 View Figs 1–9 View Figs 10–18 ); elytra patterned ( Figs 9–11 View Figs 1–9 View Figs 10–18 ). ............ ........................................... Bellascelis gen. nov.
– Anterior angles of pronotum more rounded, obtuse ( Figs 52–55 View Figs 46–54 View Figs 55–63 ); elytra not patterned ( Figs 52–55 View Figs 46–54 View Figs 55–63 ). .. .......................................... Orthoscelis gen. nov.
7(4) Antennal club clearly composed of 2 antennomeres ( Fig. 1 View Figs 1–9 ); Australia. ........... Agnetaria Bruce, 1953
– Antennal club of 3 antennomeres (antennomere 9 may be narrower than 10 (e.g., Fig. 71 View Figs 64–72 ), but distinctly wider than 8). ..................................... 8
8(7) Pronotal platform present at or near anterior angle of pronotum, with or without a distinct dorsal rim ( Figs 82–84, 88, 89 View Figs 82–89 ). .......................................... 9
– Pronotal platform absent ( Figs 85, 86 View Figs 82–89 ). ........... 10
9(8) Superior elytral epipleural carina terminating anteriorly in a sharp spine at humeral angle of elytra ( Fig. 79 View Figs 77–81 ); vertex with deep transverse impression, frons with a transverse swelling ( Fig. 89 View Figs 82–89 ); New Zealand. ..... Humerocryptus gen. nov.
– No sharp spine at humeral angle of elytra; vertex without deep impression or swelling ( Figs 82–84 View Figs 82–89 ); New Zealand and Australia. .................................. .......................... Antarcticotectus Brookes, 1951
10(8) Body mostly shining, with setae very inconspicuous, punctures of pronotum separated by more than their diameter over most of dorsal surface ( Figs 12 View Figs 10–18 , 29–32 View Figs 28–36 , 70–76 View Figs 64–72 View Figs 73–76 ); antenna inserted into deep concavity, raised portion of frons between antennal insertions constricted, narrower than width of antennal club; eye reduced. ....... 11
– Body usually dull, densely setose OR if setae inconspicuous, antenna not inserted into deep concavity, frons wide and not constricted between antennal insertions, usually much wider than antennal club; eye not reduced. ....................... 13
11(10) Postcoxal lines present on ventrite 1 (absent in one undescribed species of Thortus ). ..................... 12
– Postcoxal lines absent from ventrite 1; Chile and Australia. ................. Neopicrotus Leschen, 1996
12(11) Eyes conical in dorsal view; frons with weakly carinate elevation between antennal insertions; decumbent setae of elytra undulate; bicolored ( Fig. 12 View Figs 10–18 ); Chile. ............ Chileothortus gen. nov.
– Eyes flat or rounded in dorsal view; frons without carinate elevation between antennal insertions; decumbent setae of elytra uniformly directed posteriorly; unicolored ( Figs 70–76 View Figs 64–72 View Figs 73–76 ); New Zealand. ............................. Thortus Broun, 1893
13(10) Anterior angle of pronotum sharp, acute to rightangled ( Figs 6–8 View Figs 1–9 ); Australia. ................................ .......................................... Austroscelis gen. nov.
– Anterior angle of pronotum rounded, obtuse. ... 14
14(13) Lateral carina of pronotum with posteriorly pointed teeth, teeth asetose ( Fig. 78 View Figs 77–81 ); Ecuador and New Zealand. ........... Odontosomatula gen. nov.
– Lateral carina of pronotum without posteriorly pointed teeth (but may have setigerous tubercles). .......................................................................... 15
15(14) Anterior corners of pronotum protruding laterally, forming weak to strong knob-like structures ( Figs 56–65 View Figs 55–63 View Figs 64–72 , 87 View Figs 82–89 ); Australia, New Zealand, Chile. ......... .............................. Ostreacryptus Leschen, 2001
– Anterior corners of pronotum not protruding laterally. ........................................................... 16
16(15) Lateral bead of pronotum with glabrous space, appearing doubled from certain angles ( Fig. 85 View Figs 82–89 ); Chile. ................................ Chiliotis Reitter, 1875
– Lateral bead of pronotum without obvious glabrous space, not appearing doubled ( Fig. 86 View Figs 82–89 ); Australia, New Zealand, Juan Fernandez Islands. ............ 17
17(16) Pronotum evenly convex, without distinct pits or basal impressions ( Figs 21–25 View Figs 19–27 ); tempora absent; Juan Fernandez Islands. ................................... 18
– Pronotum (and often elytra) with either basal pits or impression(s), or both; tempora usually present; not in Juan Fernandez Islands. ......................... 19
18(17) Eyes finely faceted; discrimen at least half length of metaventrite; pronotum narrower than elytra ( Fig. 21 View Figs 19–27 ); elytra with distinct punctures; Alexander Selkirk Island. ....... Cryptosomatula Bruce, 1940
– Eyes coarsely faceted ( Fig. 81 View Figs 77–81 ); discrimen less than half length of metaventrite; pronotum as wide or nearly as wide as elytra ( Figs 22–25 View Figs 19–27 ); elytra with punctures very light, nearly effaced; Robinson Crusoe Island. ....................................... ..... Cryptothelypterus Leschen & Lawrence, 1991
19(17) Discrimen absent; pronotum highly constricted basally ( Fig. 20 View Figs 19–27 ); elytra with two pairs of silvery patches of setae ( Fig. 20 View Figs 19–27 ); Australia. .................... .................................... Cordosomatula gen. nov.
– Discrimen present; pronotum not or weakly constricted at base; Australia, New Zealand. ... 20
20(19) Metaventrite with divergent postcoxal lines ( Fig. 91 View Figs 90–94 ); with deep circular impression in center of pronotum ( Fig. 26 View Figs 19–27 ); New Zealand. ....................... ....................................... Foveocryptus gen. nov.
– Metaventrite without postcoxal lines ( Fig. 92 View Figs 90–94 ); without deep circular impression in center of pronotum. ......................................................... 21
21(20) Pronotum asymmetrically crenulate ( Fig. 77 View Figs 77–81 ); prosternal process with fine median carina; Chile. ................................. Chimaerocryptus gen. nov.
– Pronotum not asymmetrically crenulate; prosternal process lacking carina ( Fig. 90 View Figs 90–94 ); Australia and New Zealand. ................... Notocryptus gen. nov.
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