| Introduction | Materials and Methods | Results and Discussion | Keys | References | PDF 63.2 MB | Cite this Article |
Interactive HTML-based Dichotomous Key to Female Rhinonyssidae
(Mesostigmata) from Birds in Canada
CJAI 09 January 25, 2010
doi: 10.3752/cjai.2010.09
Wayne Knee*, and Heather Proctor**
* Carleton University, 1125 Colonel By Drive, Department of Biology, 209 Nesbitt Bldg, Ottawa, ON, K1S 5B6. wknee@connect.carleton.ca **University of Alberta, Department of Biological Sciences, CW 405 Biological Sciences Building, Edmonton AB, T6G 2E9. hproctor@ualberta.ca
Key to females of Ptilonyssus species known from Canada:
| 1. | Second cheliceral segment prominently inflated proximally with marked constriction distally | 14 |
| - | Second cheliceral segment without marked inflation and constriction | 2 |
| 2. | One dorsal shield present (podosomal), sternal shield absent, peritreme absent, and cribrum absent or unnoticeable | |
| - | Two dorsal shields present (podosomal plus a posterior shield composed of either pygidial shield alone, or fused opisthosomal and pygidial shields), sternal shield present, peritreme present or absent, and cribrum present | 3 |
| 3. | Ventral hypostomal setae distally inflated bulb setae | 4 |
| - | Ventral hypostomal setae not distally inflated bulb setae | 5 |
| 4. | Six pairs of ventral opisthosomal setae, anal setae tapered distally with filamentous, spike, or rounded tip.
Tarsus
IV subapical ventral setal pair relatively long, one strong spike and one filamentous spike. Subposterior
pair of dorsal podosomal setae as long or almost as long as longest mesolateral setae |
|
| - | Seven pairs of ventral opisthosomal setae, anal setae constricted proximally (within 1/3 of length from base) with long filamentous tip. Tarsus IV subapical ventral setal pair relatively long strong spikes. Subposterior pair of dorsal podosomal setae longer than mesolateral setae | Ptilonyssus plesiotypicus |
| 5. | Podosomal shield with lateral wing-like processes, posterior margin of podosomal shield rounded, two pairs of mesolateral setae | Ptilonyssus callinectoides |
| - | Podosomal shield without lateral wing-like processes, posterior margin of podosomal shield otherwise, more than two pairs of mesolateral setae | 6 |
| 6. | Peritreme absent. Opisthosomal shield laterally excavated medially with excavation extending posteriorly, anterior margin of shield bearingmedial lobe without lateral lobes | Ptilonyssus vireonis |
| - | Peritreme present. Opisthosomal shield either laterally excavated along posterior portion or no lateral excavation, anterior margin of shield either straight or medially straight with anterolateral projections | 7 |
| 7. | Sternal setae st1, st2, and st3 off shield in unsclerotized integument | 8 |
| - | Sternal setae st1, st2, and st3 on shield | 10 |
| 8. | Four pairs of mesolateral setae, six pairs of ventral opisthosomal setae, opisthosomal shield without lateral excavation, subapical ventral setal pair on tarsus IV with pointed terminus | 9 |
| - | Three pairs of mesolateral setae, six pairs of ventral opisthosomal setae, opisthosomal shield laterally excavated along the posterior portion, subapical ventral setal pair on tarsus IV relatively long strong spikes with a rounded terminus | |
| 9. | Opisthosomal shield twice as long as wide. Subapical ventral setal pair on tarsus IV relatively long filamentous spikes, long flexible tip. Paranal setae posterior to anus, paranal and postanal setae unequal length | Ptilonyssus hirsti |
| - | Opisthosomal shield less than twice as long as wide. Subapical ventral setal pair on tarsus IV long heavyset inflated spikes. Paranal setae level with anus near anterior margin of anus, paranal and postanal setae equal or almost equal length | Ptilonyssus icteridius |
| 10. | Subapical ventral setal pair on tarsus IV one short filamentous spike and one short partially inflated bulb. Sternal shield wider than long, four or five pairs of ventral opisthosomal setae | |
| - | Subapical ventral setal pair on tarsus IV either relatively long strong spikes, or one strong spike and one filamentous spike. Sternal shield longer than wide, five or six pairs of ventral opisthosomal setae | 11 |
| 11. | Subapical ventral setal pair on tarsus IV relatively long, one strong spike and one filamentous spike. Three pairs of mesolateral setae | Ptilonyssus nivalis |
| - | Subapical ventral setal pair on tarsus IV relatively long strong spikes. Four pairs of mesolateral setae | 12 |
| 12. | Mesosomal shieldlets absent, anterior margin of opisthosomal shield medially straight with anterolateral projections, podosomal shield posterior margin trilobed, subposterior pair of dorsal podosomal setae as long or longer than the longest mesolateral setae | 13 |
| - | Mesosomal shieldlets present, anterior margin of opisthosomal shield straight, podosomal shield posterior margin straight, subposterior pair of dorsal podosomal setae less than half the length of longest mesolateral setae | |
| 13. | Five pairs of ventral opisthosomal setae, subposterior pair of dorsal podosomal setae as long or almost as long as longest mesolateral setae, paranal and postanal setae equal or almost equal length | Ptilonyssus carduelis |
| - | Six pairs of ventral opisthosomal setae, subposterior pair of dorsal podosomal setae longer than longest mesolateral setae, paranal and postanal setae unequal length | |
| 14. | Subapical ventral setal pair on tarsus IV relatively long strong spikes with rounded terminus, four pairs of ventral opisthosomal setae, three pairs of mesolateral setae, postanal seta absent | |
| - | Subapical ventral setal pair on tarsus IV relatively long strong spikes, more than four pairs of ventral opisthosomal setae, three or more pairs of mesolateral setae, postanal seta present or absent | 15 |
| 15 | Pygidial shield in two fragments, subposterior setal pair either on or off fragments | 16 |
| - | Pygidial shield entire | 18 |
| 16 | Genital shield arrow-shaped, pointed terminus, 10 times longer than wide. Sternal shield absent, seven or more pairs of ventral opisthosomal setae | |
| - | Genital shield thumb-shaped, rounded terminus. Sternal shield present, six pairs of ventral opisthosomal setae | 17 |
| 17 | Paranal setae posterior to anal opening, postanal setae absent. Pygidial shield in two fragments without subposterior setal pair on fragments, subposterior pair of dorsal podosomal setae longer than longest mesolateral setae, three pairs of mesolateral setae | Ptilonyssus cerchneis |
| - | Paranal setae level with anal opening, postanal seta present. Pygidial shield in two fragments with subposterior setal pair on fragments, subposterior pair of dorsal podosomal setae half as long as longest mesolateral setae, six pairs of mesolateral setae | |
| 18 | No two pairs of mesolateral setae are twice as long as other mesolateral setae | 19 |
| - | At least two pairs of mesolateral setae are twice as long as other mesolateral setae | 21 |
| 19 | Posterior margin of podosomal shield trilobed, subposterior setal pair off podosomal shield and as long or almost as long as longest mesolateral setae, five pairs of mesolateral setae. Sternal setae st1 on shield, st2 and st3 off shield | 20 |
| - | Posterior margin of podosomal shield rounded, subposterior setal pair on podosomal shield and less than half the length of longest mesolateral setae, three pairs of mesolateral setae. Sternal setae st1, st2, and st3 on shield | Ptilonyssus nudus |
| 20 | Cribrum extends to anal shield terminus, paranal setae posterior to anal opening, paranal and postanal setae equal or almost in equal length | Ptilonyssus bombycillae |
| - | Cribrum does not extend to anal shield terminus, paranal setae level with anal opening, paranal and postanal setae of unequal length | Ptilonyssus calvaria |
| 21 | Six pairs of mesolateral setae, paranal and postanal setae of unequal length | Ptilonyssus euroturdi |
| - | Fewer than six pairs of mesolateral setae, paranal and postanal setae equal or almost in equal length | 22 |
| 22 | Posterior margin of podosomal shield medially straight with lateral lobes, subposterior setal pair on podosomal shield and as long or almost as long as longest mesolateral setae | |
| - | Posterior margin of podosomal shield either trilobed or straight, subposterior setal pair off podosomal shield and less than half the length of longest mesolateral setae | 23 |
| 23 | Posterior margin of podosomal shield trilobed, four pairs of mesolateral setae | Ptilonyssus japuibensis |
| - | Posterior margin of podosomal shield straight, five pairs of mesolateral setae | Ptilonyssus sairae |
| Introduction | Materials and Methods | Results and Discussion | Keys | References | PDF 63.2 MB | Cite this Article |
