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Table 1 Taxonomic characters of the Antarctic species of Laonice (Hartman 1953, 1978; Blake 1983; Radashevsky and Lana 2009)

From: A new species of Laonice (Spionidae, Polychaeta, Annelida) from Bellingshausen Sea (West Antarctica)

 

L. antarcticae

L. weddellia

L. vieitezi n. sp.

Frontal horns

Present

Absent

Absent

Occipital tentacle

Long, digitiform

Short, digitiform

Short, triangular

Eyes

Rudimentary or absent

Distinct

Rudimentary or absent

Maximum length of caruncle

To chaetiger 12

To chaetigers 12–20

To chaetigers 16–19

Rows of capillaries in anterior podial lobes

Up to two

Up to five

Up to five

Start of sabre chaetae

Chaetigers 23–24

Chaetigers 11–13

Chaetigers 20–27

Start of neuropodial hooks

Chaetigers 35–40

Chaetigers 20–21

Chaetigers 34–37

Start of neuropodial pouches

Chaetigers 4–5

Chaetigers 8–11

Chaetigers 16–17