Nitidulidae, Latreille, 1802

Semeraro, Linda, Blacket, Mark J., Rako, Lea & Cunningham, John Paul, 2023, The pest sap beetle Carpophilus Myothorax truncatus Murray, 1864 (Coleoptera Nitidulidae) - a new synonymy and a related new species of Carpophilus, Zootaxa 5301 (1), pp. 51-74 : 54-55

publication ID

https://doi.org/ 10.11646/zootaxa.5301.1.2

publication LSID

lsid:zoobank.org:pub:169730C3-B663-4B30-B319-A3E094BC1629

DOI

https://doi.org/10.5281/zenodo.8027727

persistent identifier

https://treatment.plazi.org/id/2E6187CB-4E2A-FF81-6D81-2FCD053D4A1C

treatment provided by

Plazi

scientific name

Nitidulidae
status

 

Key to adults of Nitidulidae View in CoL View at ENA

species commonly associated with nut orchards in south eastern Australia and some closely related species* (adapted, in part, from Leschen & Marris 2005 and Connell 1991)

1 Abdomen usually with at least three exposed tergites ( Fig. 8C,I View FIGURE 8 )................................................ 2

- Abdomen with two exposed tergites ( Fig. 8D–H View FIGURE 8 )............................................................ 3

2 Body with lateral margins slightly curved ( Fig. 8I View FIGURE 8 ), dorso-ventrally convex; pronotal margin (in lateral view) with bead twice as thick along anterior half as along posterior half ( Fig. 8B View FIGURE 8 ); elytra with punctures scattered randomly............................................................................................. Urophorus humeralis (Fabricius)

- Body with lateral margins more or less parallel-sided ( Fig. 8C View FIGURE 8 ), strongly flattened dorso-ventrally; pronotal margin with thickness of bead even throughout ( Fig. 8A View FIGURE 8 ); elytra with punctures in distinct rows, parallel along elytra length................................................................................................. Brachypeplus spp.

3 Mesosternal disc with raised carinae bearing oblique lateral arms ( Fig. 9A View FIGURE 9 )........................................4

- Mesosternal disc without carinae ( Fig. 9B View FIGURE 9 )................................................................. 5

4 Elytra with posterior half bearing distinct pale orange markings (M-shaped) and orange patches on anterior lateral humeral angles ( Fig. 8F View FIGURE 8 ).................................................................... C. hemipterus (Linnaeus)

- Elytra dark brown, black without any distinctive orange colour patterns although sometimes with faint humeral angles ( Fig. 8J View FIGURE 8 )................................................................................ C. obsoletus (Erichson)

5 Metaventrite with large axillary space, axillary line almost straight and extending to at least half way to 2/3 length along metepisternum ( Fig. 9C View FIGURE 9 )......................................................... C. marginellus Motschulsky

- Metaventrite with small axillary space, line curved reaching ¼ length along metepisternum or axillary space not clearly present ( Fig. 9D View FIGURE 9 ).............................................................................................6

6 Prosternum weakly punctate or granulate ( Fig. 9H View FIGURE 9 ), often convex and shiny in appearance; body often ventrally bicoloured, metaventrite usually darker than prosternum and abdomen but may be unicoloured; female 9th tergite truncate with median apical tubercle ( Fig. 9E View FIGURE 9 )................................................................ C. davidsoni Dobson

- Prosternum moderately to distinctly punctate ( Figs 1D,I View FIGURE 1 , 9G View FIGURE 9 ); body unicoloured ventrally; female 9 th tergite without distinct median tubercle...................................................................................... 7

7 Male metatibia, not constricted at base, gradually widened towards apex ( Fig. 9I View FIGURE 9 ).................................. 8

- Male metatibia distinctly and abruptly constricted along basal 1/3 to ¼, widened towards apex ( Figs 1E,J View FIGURE 1 , 7E View FIGURE 7 ).......... 10

8 Prosternum and hypomeron distinctly punctate ( Fig. 9G View FIGURE 9 ); 3 rd antennomere about 1.3x length of 2 nd antennomere........................................................................................... C. dimidiatus* (Fabricius)

- Prosternum distinctly to moderately punctate or granulate, hypomeron weakly punctate ( Figs 1D,I View FIGURE 1 , 3C,G View FIGURE 3 , 4C View FIGURE 4 ); 3 rd antennomere less than 1.3x length of 2 nd antennomere ( Fig. 1C,H View FIGURE 1 )......................................................... 9

9 Body chestnut brown with no distinctive pattern ( Fig. 8G View FIGURE 8 ); male mandibles asymmetrical, right mandible distinctly elbowed (right angled) ( Fig. 9F View FIGURE 9 ); prosternum entirely punctate........................................ C. mutilatus Erichson

- Body generally reddish brown, elytra golden brown but usually with a distinctive dark brown band across posterior margin ( Fig. 8H View FIGURE 8 ); male mandibles are symmetrical; prosternum punctate medially but laterally only weakly punctate or granulate............................................................................................. C. nepos* Murray

10 Body length 2.8 to 3.4 mm (> 2.5 mm); body dark brown/ black, anterior lateral margin of elytra with a pale brown/ orange patch ( Figs 1A,F View FIGURE 1 , 3A,E View FIGURE 3 ); male paramere, is distinctly truncate apically, outer apical angle with slight tooth, mesal margin distinctly angled around mid-length ( Fig. 2B,E View FIGURE 2 )...................................................... C. truncatus Murray

- Body length small, around 2.0 to 2.4 mm; body uniformly brown (not usually black and no paler patches on elytra) ( Fig. 7A,H View FIGURE 7 ); male paramere roundly truncate, (not distinctly truncate) outer apical margin somewhat rounded, mesal margin slightly concave around mid-length but not distinctly angled ( Fig. 7F View FIGURE 7 )........................................... C. imitatus sp. nov.

Note: Only Carpophilus truncatus was found damaging nuts in the current study. All other species in this key were collected in pheromone lures within almond and pistachio orchards, or are closely related species (as marked with an asterisk), which could be confused with C. truncatus .

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Nitidulidae

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