Oocyclus

Short, Andrew E. Z., Torres-Gavosto, Juan Martin & Hettinger, Ty, 2023, A review of the Oocyclus Sharp of Ecuador with description of 12 new species (Coleoptera: Hydrophilidae: Laccobiini), Zootaxa 5277 (1), pp. 91-112 : 92-93

publication ID

https://doi.org/ 10.11646/zootaxa.5277.1.4

publication LSID

lsid:zoobank.org:pub:272D07DF-8471-4ADE-9689-DB8F588ACF35

DOI

https://doi.org/10.5281/zenodo.7892056

persistent identifier

https://treatment.plazi.org/id/03BD87B6-FFB4-F438-CFDB-7787FA7DFA2C

treatment provided by

Plazi

scientific name

Oocyclus
status

 

Key to the species of Oocyclus View in CoL from the northern Andes

1 Elytra with distinct pale spot in posterior third (e.g. Fig. 4A View FIGURE 4 ); size smaller (not more than 4.0 mm)..................... 2

- Elytra without distinct pale spot in posterior third; size variable................................................. 4

2(1) Elytra without rows of setiferous punctures; posterolateral corners of pronotum broadly rounded............. O. sapphirus View in CoL

- Elytra with distinct rows of setiferous punctures (e.g. Fig. 4A View FIGURE 4 ); posterolateral corners of pronotum usually appearing weakly spinose............................................................................................. 3

3(2’) Elytra with first line of erect setae distinct and continuous ( Fig. 4A View FIGURE 4 ); aedeagus with parameres tapering to a nearly flat, blunt tip at apex ( Fig. 6F View FIGURE 6 )....................................................................... O. lepidus sp. n.

- Elytra with first line of erect setae discontinuous, with distinct gaps in the line; aedeagus with parameres broadly rounded and parallel sided at apex, not tapering ( Fig. 6G View FIGURE 6 ).................................................... O. bellus sp. n.

4(1’) Posterolateral corners of pronotum broadly rounded (e.g. Figs. 1A–C View FIGURE 1 ).......................................... 19

- Posterolateral corners of pronotum angulate or spinose (e.g. Figs. 2A–B View FIGURE 2 , 3A–B View FIGURE 3 )................................... 5

5(4’) Posterolateral corners of pronotum angulate but not prolonged into an acute spine (e.g. Fig. 3A View FIGURE 3 )....................... 6

- Posterolateral corners of pronotum spinose ( Figs. 3B View FIGURE 3 , 2A–B View FIGURE 2 ).................................................. 10

6(5) Abdominal ventrites uniformly pale yellow................................................................. 7

- Abdominal ventrites darkly colored, at least in part........................................................... 8

7(6) First row of elytra punctures formed by an irregular line of very coarse punctures, not bearing erect setae........ O. galbus View in CoL

- First row of elytra punctures forming a dense, continuous line bearing erect setae........................... O. luteus View in CoL

8(6’) First row of elytra punctures with row of erect setae along at least half of its length................................. 9

- First row of elytra punctures not bearing long setae along its length....................................... O. pittieri View in CoL

9(8) First row of elytra punctures bearing dense and continuous row of erect setae......................... O. pakcha sp. n.

- First row of elytra punctures bearing an irregular, broken row of erect setae ( Fig. 3A View FIGURE 3 )................. O. radiatus sp. n.

10(4’) Abdominal ventrites uniformly pale ( Fig. 3B View FIGURE 3 ); size very large (> 5.2 mm)........................... O. ustulatus sp. n.

- Abdominal ventrites dark brown, at most with paler or orange spots laterally (e.g. Figs. 2A–B View FIGURE 2 ); size variable (3.2–5.5 mm).. .................................................................................................. 11

11(10’) First row of systematic punctures bearing a more or less continuous like of erect setae (the line may have small breaks but these are short); size large (> 4.2 mm)......................................................................... 16

- First row of systematic punctures at most bearing a few small clumps or erect setae along its length or occasionally without any distinct line or clups of erect setae; size usually smaller, rarely greater than 4.0 mm (except O. zamora : 4.1–4.4 mm)..... 12

12(11’) Elytra without clumps of erect setae................................................................. O. pico View in CoL

- Elytra bearing clumps of erect setae, at least mesally near the elytra suture (e.g. Figs. 2A–B View FIGURE 2 , 4B View FIGURE 4 )..................... 13

13(12’) Aedeaegus with parameres strongly narrowing in apical half ( Figs. 6D–E View FIGURE 6 ); rows of elytra systematic punctures distinct from ground punctation; elytra with blue maculae ( Figs. 2A–B View FIGURE 2 )................................................... 14

- Aedeaegus with parameres not narrowing in apical half, sometimes even appearing to swell towards apex ( Figs. 6H–J View FIGURE 6 ); rows of systematic punctures not distinct; elytra without blue maculae............................................... 15

14(13) First row of elytra systematic punctures represented by a short linear tuft of erect setae anteriorly, then the remainder of the row bearing sparse usually decumbant setae ( Fig. 2B View FIGURE 2 ); anterolateral pale spot larger........................ O. sumak sp. n.

- First row of elytra systematic punctures represented by a line of tufts and erect setae along its entire length ( Fig. 2A View FIGURE 2 ); anterolateral pale spot smaller.......................................................................... O. ankas sp. n.

15(13’) Elytral ground punctation bearing short scattered setae; size larger (4.1–4.4 mm), ground punctation coarser ( Fig. 1B View FIGURE 1 )............................................................................................ O. zamora sp. n.

- Elytral ground punctation not bearing setae; size smaller (3.1–4.1 mm), ground punctation finer ( Fig. 4B View FIGURE 4 )........................................................................................ O. morgani View in CoL / trujillo View in CoL species group

16(11) First row of elytral systematic punctures continuous, without short breaks. Lateral rows of elytral systematic punctures much coarser than surrounding ground punctation, making them easy to discern....................................... 18

- First row of elytral systematic punctures not continuous, interrupted by short breaks. Lateral rows of elytral systematic punctures similar in size to surrounding ground punctation, making them difficult to discern................................. 17

17(16’) Lateral rows of elytra systematic punctures coarser than surrounding punctures............................. O. maluz View in CoL

- Lateral rows of elytra systematic punctures similar in size to surrounding ground punctation, making them difficult to discern.......................................................................................... O. andinus View in CoL

18(16) Aedeagus with parameres inwardly curved at apex, not sinuate along outer margin. Elytral margins distinctly explanate in posterior third. Dorsal ground punctation on pronotum and elytra fine but distinct....................... O. meridensis View in CoL

- Aedeagus with parameres slightly inwardly curved at apex, sinuate along outer margin. Elytral margins not to very weakly explanate in posterior third. Dorsal ground punctation on pronotum and elytra very fine; present but appearing nearly effaced......................................................................................... O. substillus View in CoL

19(4) Mesoventral process set with thin hairs. Elytra bearing dense setae from ground punctures.......................... 20

- Mesoventral process set with thickened spines. Elytra at most with setae arising in rows............................ 21

20(19) Anterolateral corners of pronotum with pale spot.............................................. O. rupestris sp. n.

- Anterolateral corners of pronotum without pale spot................................................... O. sharpi View in CoL

21(19’) Anterolateral corners of pronotum with pale spot (e.g. Fig. 1C View FIGURE 1 ); prosternal process with or without a pair of spines anteriorly. .................................................................................................. 22

- Anterolateral corners pronotum without pale spot (e.g. Fig. 1B View FIGURE 1 ); prosternal process not set with a pair of spines anteriorly... .................................................................................................. 23

22(21) Prosternal process set with two spines anteriorly................................................... O. maculatus Prosternal View in CoL process without spines........................................................... O. yantzaza sp. n.

23(21’)Aedeagus with narrow median lobe ( Figs. 5E–F View FIGURE 5 )............................................... O. kichwa sp. n.

- Aedeagus with broad median lobe ( Fig. 5H View FIGURE 5 ).................................................... O. ancho sp. n.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Hydrophilidae

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