Polyarthra

José, Susana B., Paggi, De & Paggi, Juan C., 2011, A new species of Polyarthra Ehrenberg, 1834 belonging to the vulgaris- group (Rotifera: Monogononta: Synchaetidae) from Argentina, with a key to the identification of species in the Neotropical Region, Zootaxa 2828, pp. 51-57 : 56

publication ID

https://doi.org/ 10.5281/zenodo.203769

DOI

https://doi.org/10.5281/zenodo.6192016

persistent identifier

https://treatment.plazi.org/id/33420333-FFB0-FFD7-1CB1-B399FA3DFB3E

treatment provided by

Plazi

scientific name

Polyarthra
status

 

Key to the identification of Polyarthra View in CoL View at ENA species in the Neotropical Region

1 Accessory pair of ventral paddles absent................................................................... 2

- Accessory pair of ventral paddles present................................................................... 3

2 Major View in CoL paddles lanceolate, broad, 5 to 7 times as long as width, teeth with oblique, submarginal pleats. Inner margin of anterior part of rami, before to the major View in CoL tooth, denticulate, posterior part smooth. Manubria stout, 11–12 times as long as mean width; with an outer angular projection medially....................................... Polyarthra major Burckhardt, 1900 View in CoL

- Major View in CoL paddles ensiform, narrow, 10 to 14 times as long as width, teeth without submarginal pleats. Inner margin of anterior part of rami, before the major View in CoL tooth, smooth, posterior part, denticulate. Manubria slender, 30 to 32 times as long as mean width; without any projection................................................. Polyarthra remata Skorikov, 1896 View in CoL

3 Major View in CoL paddles homogeneous in shape, fulcrum shorter or longer than rami....................................... 4

- Major View in CoL paddles heterogeneous in shape, fulcrum as long as rami................................................ 5

4 Major View in CoL paddles narrow, 12–13 times as long as width; accessory ventral paddles bristle-like; anterior half of inner margin of rami finely denticulate; unci with three teeth; fulcrum longer than rami............... Polyarthra longiremis Carlin, 1943 View in CoL

- Major View in CoL paddles moderately broad, 5–7 times as long as width; accessory ventral paddles ligulate with denticulate margin; inner margin of rami with anterior third broadly rounded and middle third asymmetrical, with two teeth and one semicircular concavity at one side, and one tooth followed by a semicircular expansion at the other side; unci with single tooth; fulcrum shorter than rami................................................................... Polyarthra vulgaris Carlin, 1943 View in CoL

5 Major View in CoL paddles similar in shape, but those of ventrolateral bundles widest at distal half and those of dorsolateral paddles widest at proximal half; accessory paddles broad, lanceolate with serrated edges; manubria with lamella; manubria and unci, practically equal in length; no lateral expansion of dorsal integument.................... Polyarthra luminosa Kutikova, 1962 View in CoL

- Major View in CoL paddles within all bundles with the same pattern of shapes, one ensiform plus two lanceolate; accessory paddles narrow, ligulate with smooth edges; manubria without lamella; unci definitely shorter than manubria; dorsal integument with a pair of lateral, normally angled, expansions................................................ Polyarthra platensis sp. nov.

Kingdom

Animalia

Phylum

Rotifera

Class

Eurotatoria

Order

Ploima

Family

Synchaetidae

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