Eucinetidae, Lacordaire, 1857

Lawrence, John F., 2019, New species of Eucinetus and Noteucinetus from Australia (Coleoptera: Scirtoidea: Eucinetidae), Zootaxa 4668 (2), pp. 151-182 : 154-155

Key to genera and species of Eucinetidae occurring in Australia

1. Elytra without transverse strigulae ( Figs 89–90 ); ratio of body length to elytral width less than 1.60 ( Figs 30–33 ); ratio of greatest depth to elytral width usually greater than 0.70; posterior edge of mesoventrite rounded ( Fig. 102 ); anterior edge of labrum broadly rounded with small median notch ( Figs 125–126 ); hind wings highly reduced or absent; parameres much shorter than penis ( Figs 140–142 ).................................................... Noteucinetus Bullians & Leschen … 2

- Elytra with transverse strigulae ( Figs 77–88 ); ratio of body length to elytral width greater than 1.60 ( Figs 1–29 ); ratio of greatest depth to elytral width usually less than 0.70; posterior edge of mesoventrite notched ( Fig. 101 ); anterior edge of labrum more or less truncate, without median notch ( Figs 123, 127 ); hind wings well-developed or absent; parameres more or less equal in length to penis ( Figs 128–139 )................................................. Eucinetus Germar … 3

2(1). Length greater than 1.40 mm; body more than 1.4 times as long as elytral width; elytra reddish brown to dark brown or black, with reddish stripe along elytral suture ( Figs 32–33 ); mesotibia in both sexes with two spurs, one of which in male is apically widened and cleft ( Fig. 108 ); free portion of paramere narrow and parallel-sided; Victoria ( Figs 140–141 )................................................................................................... N. victoriae sp. nov.

- Length less than 1.40 mm; body less than 1.4 times as long as elytral width; elytra yellow or yellow with black markings ( Figs 30–31 ); mesotibia in both sexes with one acute spur; free portion of paramere broad at base and narrowing towards subacute apex; northern NSW and southern QLD ( Fig. 142 )........................................... N. ornatus sp. nov.

3(1). Metanepisternum almost as long as or longer than mesepimeron and at least twice as long as wide ( Fig. 96 ); hind wings welldeveloped; inner eye margin with distinct notch ( Fig. 35 ); scutellar shield somewhat rounded at apex ( Fig. 100 )......... 4

- Metanepisternum distinctly shorter than mesepimeron and about as long as wide ( Fig. 95 ); hind wings absent; inner eye margin without distinct notch ( Fig. 34 ); scutellar shield sharply acute at apex ( Fig. 103 )................................... 7

4(3). Body less than 1.90 times as long as wide; elytra less than 1.57 times as long as wide; apical maxillary palpomere widest at middle and acute at apex ( Figs 62, 65 ).................................................................... 5

- Body more than 1.90 times as long as wide; elytra more than 1.57 times as long as wide; apical maxillary palpomere widened and obliquely truncate apically ( Figs 57–58, 63 ); pronotum red and elytra black ( Figs 15–16, 20–23 ).................. 6

5(4). Upper surfaces entirely black ( Figs 24–25 ); 11th antennomere less than 1.8 times as long as wide ( Fig. 45 ); northern QLD.............................................................................. Eucinetus nebulosus sp. nov.

- Head, pronotum and scutellar shield red, elytra black ( Figs 28–29 ); 11th antennomere more than 2.00 times as long as wide ( Fig. 51 ); northern QLD.......................................................... Eucinetus tropicus sp. nov.

6(4). Head at least partly black ( Fig. 16 ); apical maxillary palpomere less than 1.4 times as long as wide and more strongly, obliquely expanded apically ( Figs 57–58 ); 3rd antennomere only slightly shorter than 4th ( Fig. 36 ); 11th antennomere less than 1.5 times as long as wide ( Fig. 47 ); central NSW to northern QLD............................. Eucinetus lorien sp. nov.

- Head red ( Fig. 23 ); apical maxillary palpomere more than 1.6 times as long as wide and less strongly, obliquely expanded apically ( Fig. 63 ); 3rd antennomere much shorter than 4th; 11th antennomere more than 1.7 times as long as wide ( Fig. 49 ); NSW, ACT, VIC, TAS............................................................. Eucinetus similis sp. nov.

7(3). Upper surfaces of pronotum and elytra uniformly dark brown or black; length less than 1.85 mm and elytra less than 1.44 times as long as wide; VIC ( Figs 17–19 ).................................................. Eucinetus minutus sp. nov.

- Upper surface of pronotum never dark brown, usually reddish-brown or red; length usually greater than 1.85 mm and elytra more than 1.44 times as long as wide..................................................................... 8

8(7). Pronotum reddish-brown, elytra yellowish-brown ( Figs 5–12 , 26–27 )........................................... 9

- Pronotum red, elytra primarily black ( Figs 1–4 , 13–14 , 28–29 )................................................ 11

9(8). Length less than 2.00 mm; apical antennomere ( Fig. 42 ) at least 2.00 times as long as wide; apical maxillary palpomere ( Fig. 55 ) obliquely truncate apically with aciculate tip at one edge; pronotum reddish-brown, elytra yellowish-brown, head dark brown, undersurfaces mostly dark brown ( Figs 9–12 ); parameres distinctly bowed outwardly ( Figs 12 , 143 ); NSW...................................................................................... Eucinetus dorrigo sp. nov.

- Length usually greater than 2.00 mm; apical antennomere less than 2.00 times as long as wide; apical maxillary palpomere gradually narrowed apically with aciculate tip in center ( Figs. 54, 64 ); parameres not outwardly bowed ( Figs 130 , 136 )... .. 10

10(9). Apical antennomere ( Fig. 41 ) more than 1.6 times as long as wide; 3rd antennomere distinctly shorter than 4th; sides of elytra more strongly curved; head and pronotum reddish-brown, elytra yellowish-brown and undersurfaces somewhat darker ( Figs 5–8 ); upper surfaces more distinctly curved in lateral view ( Fig. 6 ); length 2.00–2.20 (2.10 ± 0.07) mm; ACT...................................................................................... Eucinetus brindabellae sp. nov.

- Apical antennomere ( Fig. 50 ) less than 1.5 times as long as wide; 3rd antennomere equal in length to 4th; sides of elytra less strongly curved; colour mainly yellowish-brown with legs and antennae yellow ( Figs 26–27 ); upper surfaces very slightly curved in lateral view ( Fig. 27 ); length 1.80–2.30 (2.06 ± 0.18) mm; TAS................. Eucinetus tasmaniae sp. nov.

11(8). Length almost always 2.00 mm or less; head, pronotum and scutellar shield red; elytra primarily black ( Figs 3–4 , 23 ).... 12

- Length greater than 2.00 mm; head always black ( Figs 1–2 , 13–14 )............................................ 13

12(11). Male protibia and basal protarsomeres distinctly expanded ( Figs 92, 99 ); terminal antennomere at least 1.9 times as long as wide, parallel-sided and apically truncate ( Fig. 44 ); parameres at middle distinctly narrower than penis at same point, strongly converging and slightly expanded apically; penis widest at subapex and then narrowed to acute apex ( Fig. 137 ); eastern VIC............................................................................ Eucinetus protibialis sp. nov.

- Male protibia and basal protarsomeres not expanded; terminal antennomere about 1.5 times as long as wide and broadly rounded at apex ( Fig. 39 ); parameres at middle as wide as or slightly wider than penis at same point; penis not expanded subapically ( Fig. 129 ); TAS....................................................... Eucinetus bicolorellus sp. nov.

13(11). Pronotum red; head, scutellar shield, elytra and undersides black ( Figs 1–2 ); length usually less than 2.40 mm and body usually less than 1.80 times as long as combined elytral width; apical antennomere broadly rounded at apex ( Fig. 40 ); VIC....................................................................................... Eucinetus bicolor sp. nov.

- Pronotum, scutellar shield and sides of elytra red; head and most of elytra black ( Figs 13–14 ); length usually greater than 2.30 mm and body more than 1.80 times as long as combined elytral width; apical antennomere subtrunacte at apex ( Fig. 43 ); northern NSW, southern QLD..................................................... Eucinetus limitaris sp. nov.

Figures

FIGURES 89–103. Morphological details: 89–90, Noteucinetus spp., portion of elytral surface: 89, N. ornatus sp. nov.; 90, N. victoriae sp. nov.; 91, E. dorrigo sp. nov., pterothorax with mid legs removed; 92, E. protibialis sp. nov., protibia and tarsus; 93, N. victoriae sp. nov., metacoxae and metendosternite; 94, E. brindabellae sp. nov., metendosternite; 95–96, metanepisternum: 95, E. bicolor sp. nov.; 96, E. lorien sp. nov.; 97–98, E. brindabellae sp. nov., metacoxal plate: 97, base, showing interlocking device; 98, apex; 99, E. protibialis sp. nov., apex of protarsus; 100, E. tropicus sp. nov., scutellar shield; 101–102, mesoventrite: 101, E. brindabellae sp. nov.; 102, N. victoriae sp. nov.; 103, E. dorrigo sp. nov., scutellar shield.

FIGURES 24–33. Habitus: 24, E. nebulosus sp. nov., sex? (2.30 mm): dorsal; 25, same, lateral; 26, E. tasmaniae sp. nov., male (2.00 mm): dorsal; 27, same, lateral; 28, E. tropicus sp. nov., female (2.10 mm): dorsal; 29, same, lateral; 30, Noteucinetus ornatus sp. nov., male (1.4 mm), dorsal; 31, same, lateral; 32, N. victoriae sp. nov., male (1.6 mm), dorsal; 33, same, lateral.

FIGURES 119–132. Morphological details: 119, Noteucinetus victoriae sp. nov., male abdominal sternites VIII and partly concealed IX; 120, N. ornatus sp. nov., male abdominal sternite IX; 121, Eucinetus bicolorellus sp. nov., mandible, ventral; 122, E. limitaris sp. nov., male abdominal tergite X; 123, E. brindabellae sp. nov., labrum; 124, E. nebulosus sp. nov., mandible, ventral; 125–127, labrum: 125, N. victoriae sp. nov.; 126, N. ornatus sp. nov.; 127, E. nebulosus sp. nov.; 128–132, aedeagal apex: 128, E. bicolor sp. nov.; 129, E. bicolorellus sp. nov.; 130, E. brindabellae sp. nov.; 131, E. limitaris sp. nov.; 132, E. lorien sp. nov. (northern QLD).

FIGURES 133–148. Morphological details: 133–140, aedeagal apex: 133, Eucinetus lorien sp. nov. (NSW); 134, E. similis sp. nov.; 135, E. tropicus sp. nov.; 136, E. tasmaniae sp. nov.; 137, E. protibialis sp. nov.; 138, E. minutus sp. nov.; 139, E. nebulosus sp. nov.; 140, Noteucinetus victoriae sp. nov.; 141, N. victoriae sp. nov., left parameral apex; 142, N. ornatus sp. nov., apices of parameres and penis; 143–147, E. dorrigo sp. nov., aedeagus: 143, parameral apices; 144, parameral bases; 145, penile apex, dorsal; 146, penile base, dorsal; 147, penile base, lateral; 148, N. ornatus sp. nov., aedeagal phallobase and parameral bases.

FIGURES 73–88. Morphological details: 73–75, mentum and prementum: 73, E. lorien sp. nov. (northern QLD); 74, E. bicolor sp. nov.; 75, E. protibialis sp. nov.; 76, E. brindabellae sp. nov., elytral interlocking device; 77–88, Eucinetus spp., portion of elytral surface (100×): 77, E. bicolor sp. nov.; 78, E. bicolorellus sp. nov.; 79, E. brindabellae sp. nov.; 80, E. dorrigo sp. nov.; 81, E. limitaris sp. nov.; 82, E. lorien sp. nov. (NSW); 83, E. minutus sp. nov.; 84, E. nebulosus sp. nov.; 85, E. tropicus sp. nov.; 86, E. protibialis sp. nov.; 87, E. similis sp. nov.; 88, E. tasmaniae sp. nov.

FIGURES 1–12. Habitus: 1, Eucinetus bicolor sp. nov. (2.50 mm): dorsal; 2, same, lateral; 3, E. bicolorellus sp. nov. (1.90 mm): dorsal; 4, same, lateral; 5, E. brindabellae sp. nov., female (2.10 mm): dorsal; 6, same, lateral; 7, E. brindabellae sp. nov., male (2.10 mm): dorsal; 8, same, posterodorsal; 9, E. dorrigo sp. nov., female (1.80 mm): dorsal; 10, same, lateral; 11, E. dorrigo sp. nov., male (1.90 mm): dorsal; 12, same, posterodorsal.

FIGURES 13–23. Habitus: 13, Eucinetus limitaris sp. nov., male (2.45 mm): dorsal; 14, same, lateral; 15, E. lorien sp. nov., female (2.70 mm): dorsal; 16, same, lateral. 17, E. minutus sp. nov., female, (1.70 mm): dorsal; 18, same, lateral; 19, E. minutus sp. nov., male (1.80 mm): dorsal; 20, E. similis sp. nov., female (2.90 mm): dorsal; 21, E. similis sp. nov., male (3.20 mm): dorsal; 22. same, lateral; 23, E. protibialis sp. nov., male (2.10 mm), dorsal.

FIGURES 104–118. Morphological details: 104–108, mesotibial apex of male: 104, Eucinetus bicolor sp. nov.; 105, E. bicolorellus sp. nov.; 106, E. limitaris sp. nov.; 107, E. protibialis sp. nov.; 108, Noteucinetus victoriae sp. nov.; 109–112, mesopretarsal claws: 109, E. lorien sp. nov.; 110, E. nebulosus sp. nov.; 111, E. similis sp. nov.; 112, E. tropicus sp. nov.; 113, E. nebulosus sp. nov., male abdominal ventrites 1–5; 114–115, male abdominal sternite IX: 114, E. tropicus sp. nov.; 115, E. dorrigo sp. nov., apex; 116–117, male abdominal sternite VIII: 116, E. nebulosus sp. nov.; 117, E. lorien sp. nov.; 118, E. dorrigo sp. nov., male abdominal sternite IX, base.

FIGURES 34–51. Morphological details: 34–35, right side of head, dorsal: 34, Eucinetus nebulosus sp. nov., showing eye notch; 35. E. bicolor sp. nov., with lack of eye notch; 36, E. lorien sp. nov., antennomeres 1–6; 37, Noteucinetus victoriae sp. nov., antennomeres 5–11; 38, same, antennomeres 10–11; 39–51, Eucinetus spp., antennomere 11: 39, E. bicolorellus sp. nov.; 40, E. bicolor sp. nov.; 41, E. brindabellae sp. nov.; 42, E. dorrigo sp. nov.; 43, E. limitaris sp. nov.; 44, E. protibialis sp. nov.; 45, E. nebulosus sp. nov.; 46, E. minutus sp. nov.; 47, E. lorien sp. nov. (NSW); 48, E. lorien sp. nov. (northern QLD); 49, E. similis sp. nov.; 50, E. tasmaniae sp. nov.; 51, E. tropicus sp. nov.

FIGURES 52–72. Morphological details: 52–66, apical maxillary palpomere: 52, Eucinetus bicolor sp. nov.; 53, E. bicolorellus sp. nov.; 54, E. brindabellae sp. nov.; 55, E. dorrigo sp. nov.; 56, E. limitaris sp. nov.; 57, E.ucinetus lorien sp. nov. (northern QLD); 58, E. lorien sp. nov. (NSW); 59, E. minutus sp. nov.; 60, Noteucinetus ornatus sp. nov.; 61, E. protibialis sp. nov.; 62, E. nebulosus sp. nov.; 63, E. similis sp. nov.; 64, E. tasmaniae sp. nov.; 65, E. tropicus sp. nov.; 66, Noteucinetus victoriae sp. nov.; 67–69, apical labial palpomere: 67, E. brindabellae sp. nov.; 68, N. ornatus sp. nov.; 69, N. victoriae sp. nov.; 70–72, maxilla: 70, E. dorrigo sp. nov.; 71, E. lorien sp. nov.; 72, E. protibialis sp. nov.