Eucinetus Germar, 1818

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

publication ID	https://doi.org/10.11646/zootaxa.4668.2.1
publication LSID	lsid:zoobank.org:pub:DDEB92E2-3F1B-463F-B68C-4C3E282279FF
DOI	https://doi.org/10.5281/zenodo.5933589
persistent identifier	https://treatment.plazi.org/id/E52C87D7-3D3F-FF9D-FF74-4A51290AFA7C
treatment provided by	Plazi (2019-09-16 10:35:56, last updated 2024-11-26 08:02:43)
scientific name	Eucinetus Germar, 1818
status

Treatment

Eucinetus Germar, 1818 View in CoL View at ENA

Eucinetus Germar 1818: 255 View in CoL . Type species: Scaphidium haemorrhoidale Germar, 1818 .

Hamaxobium Duftschmid 1825: 79 . Type species: Hamaxobium haemorrhoum Duftschmid, 1825 .

Apeosina Broun 1881: 692 . Type species: Apeosina stewarti Broun, 1881 .

Cryptomera Broun 1893: 1358 . Type species: Cryptomera nigra Broun, 1893 .

Diagnosis. Species of Eucinetus differ from those of Noteucinetus in the more elongate body with a somewhat less convex upper surface, elytra with transverse strigulae ( Figs 77–88 View FIGURES 73–88 ), slightly incrassate to subserrate antennae ( Figs 4, 10 View FIGURES 1–12 , 14, 18, 22 View FIGURES 13–23 , 25 View FIGURES 24–33 , 36 View FIGURES 34–51 ), lateral arms of metendosternite forming an angle of less than 45 degrees with apical muscle discs not circular ( Fig. 94 View FIGURES 89–103 ), prosternal process not widened apically, mesoventrite with slender cavity and notched posterior edge ( Fig. 101 View FIGURES 89–103 ), hind wings either fully developed or absent, sternite IX in male elongate with rounded apex and slender basal strut ( Figs 114–116 View FIGURES 104–118 ) and parameres as long as or slightly longer than penis ( Figs 128–139 View FIGURES 119–132 View FIGURES 133–148 ). The Holarctic genus Nycteus may be distinguished from both Eucinetus and Noteucinetus by the elongate head with antennal insertions and antennal grooves completely exposed, the U-shaped frontoclypeal suture and the anterolateral angle of the mesepimeron acute. In both Eucinetus and Noteucinetus , the head is much shorter and broader with antennal insertions and antennal grooves more or less concealed ( Figs 34–35 View FIGURES 34–51 ), the frontoclypeal suture is straight and transverse with a distinct angle at each end and the anterolateral angle of the mesepimeron is never sharply acute.

Note. Eucinetus is a widely distributed genus with 21 described species from North to South America, Eurasia, Africa, Sri Lanka, Malaysia and New Zealand; it is likely, however, that numerous other species remain to be described from various regions. The Australian fauna is diverse and only partially described in the present treatment. Four winged species are described here, although Eucinetus lorien and Eucinetus similis may represent geographic variants, and specimens of Eucinetus lorien from the type locality in NSW ( Figs 46 View FIGURES 34–51 , 58 View FIGURES 52–72 , 133 View FIGURES 133–148 ) differ slightly from those from northern QLD ( Figs 48 View FIGURES 34–51 , 57 View FIGURES 52–72 , 132 View FIGURES 119–132 ). There are almost certainly more wingless species to be described, especially from southern coastal and montane NSW, but these will have to await a more thorough study.

References

Broun, T. (1881) Manual of the New Zealand Coleoptera. Part II. Colonial Museum & Geological Survey Department, Wellington, viii + 92 + iii pp. [pp. i-viii + 653 - 744 pp. + xxi-xxiii.

Broun, T. (1893) Manual of the New Zealand Coleoptera. Parts V, VI & VII. Colonial Museum & Geological Survey Department, Wellington, xvii + 530 pp. [pp. i-xvii + 975 - 1504 pp.]

Duftschmid, C. (1825) Fauna Austriae, oder Beschreibung der osterreichischen Insekten fur angehende Freunde der Entomologie. Dritter Theil. Akademie Buchhandlung, Linz, 289 pp.

Germar, E. F. (1818) Vermischte Bemerkungen uber einige Kaferarten. Magazin der Entomologie, 3, 228 - 260.

Figures

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 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 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 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 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 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 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.