Silphidae
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publication ID |
https://doi.org/ 10.11646/zootaxa.3666.2.7 |
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publication LSID |
lsid:zoobank.org:pub:4951C68A-93C4-4777-B7D4-D7D657AE1DBC |
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DOI |
https://doi.org/10.5281/zenodo.6149443 |
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persistent identifier |
https://treatment.plazi.org/id/03BDFF50-6D1B-507D-B7A4-F99BFA72FBA1 |
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treatment provided by |
Plazi |
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scientific name |
Silphidae |
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Key to the adult Silphidae of Texas
1 Elytra shorter, truncate, exposing 3 or 4 abdominal terga, usually with irregular red or orange maculae ( Figs. 24–30 View FIGURES 24 – 30 ); fifth abdominal tergum with stridulatory files; head with epistomal suture present ( Fig. 1 View FIGURES 1 – 6 ); second antennomere small, indistinct, hidden in tip of first antennomere ( Fig. 2 View FIGURES 1 – 6 ). ( Nicrophorinae : Nicrophorus )........................................ 7
- Elytra longer, usually not truncate, at most exposing 1 or 2 abdominal terga, usually without large colored maculae ( Figs. 18– 23 View FIGURES 18 – 23 ); fifth abdominal tergum lacking stridulatory files; head with epistomal suture absent ( Fig. 3 View FIGURES 1 – 6 ); second antennomere distinct, not hidden in tip of first antennomere ( Fig. 4 View FIGURES 1 – 6 ). ( Silphinae ).................................................... 2
2(1-) Pronotum widest toward base ( Fig. 6 View FIGURES 1 – 6 ); elytra immaculate; hind femur of male not swollen and without spines............. 3
- Pronotum orbicular, widest toward middle ( Fig. 5 View FIGURES 1 – 6 ); elytra with small red maculae before apex; hind femur of male swollen, with one or two spines. Habitus: Fig. 19 View FIGURES 18 – 23 ......................................... Necrodes surinamensis (Fabricius)
3(2) Head with a row of long erect hairs behind eyes; elytral disc with rugose to rugulose sculpturing, at least distally, and with dis- tinct costae ( Figs. 18, 20–22 View FIGURES 18 – 23 )........................................................................... 4
- Head without a row of long erect hairs behind eyes; elytral disc smooth, without costae. Habitus: Fig. 23 View FIGURES 18 – 23 .............................................................................................. Thanatophilus truncatus (Say)
4(3) Elytral epipleuron without aeneous luster or short golden hairs; pronotum entirely black, or with a black median macula and red-orange margins; elytral disc distally with weak rugulose sculpturing ( Figs. 20–22 View FIGURES 18 – 23 ). ( Oiceoptoma ).................. 5
- Elytral epipleuron with aeneous luster and short golden hairs; pronotum with a black median macula and yellow margins; ely- tral disc uniformly rugose. Habitus: Fig. 18 View FIGURES 18 – 23 ....................................... Necrophila americana (Linnaeus)
5(4) Pronotum entirely black ( Figs. 20, 22 View FIGURES 18 – 23 ).................................................................... 6
- Pronotum black with red-orange margins. Habitus: Fig. 21 View FIGURES 18 – 23 ........................ Oiceoptoma noveboracense (Forster)
6(5) Elytral epipleuron wide in posterior half ( Fig. 7 View FIGURES 7 – 11 ), with upper oblique portion twice width of lower vertical portion; elytral inter- vals distally with weak rugulose sculpturing. Habitus: Fig. 20 View FIGURES 18 – 23 ........................ Oiceoptoma inequale (Fabricius)
- Elytral epipleuron narrow in posterior half ( Fig. 8 View FIGURES 7 – 11 ), with upper oblique portion approximately equal in width to lower vertical portion; elytral intervals distally with weak to strong rugulose sculpturing. Habitus: Fig. 22 View FIGURES 18 – 23 ...................................................................................................... Oiceoptoma rugulosum Portevin
7(1) Pronotum with anterior transverse impression, lateral margins not exceptionally narrow ( Fig. 10 View FIGURES 7 – 11 ); elytral epipleuron wide.. 8
- Pronotum without anterior transverse impression, lateral margins extremely narrow ( Fig. 9 View FIGURES 7 – 11 ); elytral epipleuron narrow. Habi- tus: Fig. 25 View FIGURES 24 – 30 ................................................................ N icrophorus carolinus (Linnaeus)
8(7) Frons and pronotal disc black; tarsal empodium bisetose ( Fig. 12 View FIGURES 12 – 17 ).............................................. 9
- Frons and pronotal disc red ( Fig. 10 View FIGURES 7 – 11 ); tarsal empodium quadrisetose ( Fig. 11 View FIGURES 7 – 11 ). Habitus: Fig. 24 View FIGURES 24 – 30 ..................................................................................................... Nicrophorus americanus Olivier
9(8) Pronotum glabrous, or with sparse hairs on anterior or lateral margins............................................ 10
- Pronotum with dense yellow pubescence. Habitus: Fig. 30 View FIGURES 24 – 30 ............................ Nicrophorus tomentosus Weber
10(9) Posterior lobe of metepimeron glabrous or with dark hairs (or only a few yellow hairs) ( Fig. 15 View FIGURES 12 – 17 ); pronotum variable ( Figs. 16– 17 View FIGURES 12 – 17 )............................................................................................... 11
- Posterior lobe of metepimeron covered with dense yellow pubescence ( Fig. 13 View FIGURES 12 – 17 ); pronotum cordate, widest anteriorly ( Fig. 14 View FIGURES 12 – 17 ). Habitus: Fig. 26 View FIGURES 24 – 30 ............................................................ Nicrophorus marginatus Fabricius
11(10) Dorsal surface of elytra without long hairs ( Fig. 13 View FIGURES 12 – 17 ); epipleural ridge extended almost to humeral callus................ 12
- Dorsal surface of elytra with long fine hairs, especially laterally ( Fig. 15 View FIGURES 12 – 17 ); epipleural ridge obliterated well before humeral cal- lus. Habitus: Fig. 29 View FIGURES 24 – 30 .............................................................. Nicrophorus orbicollis Say
12(11) Epipleuron entirely black; dorsal elytral maculation inconspicuous. Habitus: Fig. 28 View FIGURES 24 – 30 ....... Nicrophorus pustulatus Herschel
- Epipleuron mostly orange with anterior black macula; dorsal elytral maculation conspicuous. Habitus: Fig. 27 View FIGURES 24 – 30 ...................................................................................... Nicrophorus mexicanus Matthews
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