Cissidium
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publication ID |
https://doi.org/ 10.11646/zootaxa.3937.1.9 |
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publication LSID |
lsid:zoobank.org:pub:EEEF929E-9026-4997-9F17-299632231621 |
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DOI |
https://doi.org/10.5281/zenodo.6102718 |
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persistent identifier |
https://treatment.plazi.org/id/7679A20B-D025-FF98-FF61-0260FA47FA3A |
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treatment provided by |
Plazi |
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scientific name |
Cissidium |
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Key to the Cissidium View in CoL species of Bolivia
Note: the form of the antennae, genitalia and mesoventrum provide the best means of distinguishing species. The pronotum is also helpful but requires very careful orientation so that it is viewed from directly above (some of the Figs. 2–9 View FIGURES 2 – 7. 2 View FIGURES 8 – 13 are not viewed in this way). In normal view, when the pronotum slopes down at the front, the lateral margins can easily appear to be angled and/or to have straight edges particularly in the posterior half. Similarly, the tip of the aedeagus is best viewed from several angles to be sure of correctly determining the shape.
1. Mesoventrum perforated and collar full width of keel at junction ( Fig. 44 View FIGURE 44 )................................. Dacrysoma View in CoL
- Mesoventrum without visible perforation and collar reduced in width at junction................................... 2
2. Mesoventral keel in horizontal view with a clearly projecting hook ( Fig. 34 View FIGURES 26 – 35. 26 ). Meso- ventrum extending anteriorly onto ventral surface of collar; collar with a posteriorly oriented keel close to lateral margins. Mesoventral keel between the mesocoxae parallel sided with a rounded tip ( Figs. 10, 13 View FIGURES 8 – 13 )................................................................. 3
- Mesoventral keel in horizontal view without a projecting hook ( Fig. 35 View FIGURES 26 – 35. 26 ). Posterior margin of collar with only small medial projection, mesoventral keel between the mesocoxae tapering to a point............................................ 4
3. Smaller species, pronotum narrow, lateral margins appearing distinctly bulbous anteriorly, antennomere 11 very long, unlike any other species ( Fig. 25 View FIGURES 20 – 25 ).......................................................................... tigrum View in CoL
- Larger species, antennomere 11 much shorter............................................................. lisae View in CoL
4. Posterior margin of pronotum with a distinct sinuation in front of the hind angle ( Fig.14 View FIGURES 14 – 19 ); antennomere 11 with a short median restriction so that the two parts are barely separated ( Fig. 24 View FIGURES 20 – 25 ). Male with a series of stout, blunt spines on abdominal ventrite VIII ( Fig. 31 View FIGURES 26 – 35. 26 )................................................................................ amboroensis View in CoL
- Posterior margin of pronotum without, or with only a slight sinuation before the hind angles, two parts of antennomere 11 clearly separate...................................................................................... 5
5. Longer species> 0.90 mm ...................................................................... elongatum View in CoL
- Smaller species <0.80 mm ............................................................................. 6
6. Pronotum shorter and broader, sides more sinuate ( Fig. 18 View FIGURES 14 – 19 ). Male abdominal ventrites VII/VIII with a series of stout setae on the posterior margin ( Fig. 29 View FIGURES 26 – 35. 26 )..................................................................... globosum View in CoL
- Pronotum longer and narrower, sides less sinuate ( Fig. 19 View FIGURES 14 – 19 ). Males without stout setae on the poisterior margin of ventrites 7/8................................................................................................. petri View in CoL
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.