Key:  Family Maldanidae (bamboo worms)

Phylum Annelida
  Class Polychaeta
    Order Capitellida

Taken primarily from  Kozloff, 1987, 1996 p. 155 (Copyright 1987, 1996, University of Washington Press.  Used in this web page by permission of University of Washington Press)
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1a  Segments 2 and 3 with anteriorly directed, thin dermal collars, and more posterior segments (beginning with about segment 17) with posteriorly directed collars Rhodine bitorquata
1b None of the segments with thin dermal collars 2
2a Prostomium with a cephalic plate, this with a conspicuous rim that often appears leathery (photo) 3
2b Prostomium without a cephalic plate (it may, however, have a flattened area) 22
3a Anus dorsal to the terminal portion (which is often platelike) of the pygidium; setiger 1 without neurosetae 4
3b Anus central, either terminal or within a funnel-like modification of the pygidium; setiger 1 usually with neurosetae 9
5a Chirimia similis
6a Metasychis disparidenta
7b Chirimia biceps
9a Neuropodia of first 3 or 4 setigers with only a few (usually 1-3) setae, these generally spines or modified uncini; pygidium with or without a funnel 10
9b Neuropodia of first 2 or 3 setigers with several to many uncini (in Maldanella, however, the first setiger does not have a neuropodium); pygidium with a funnel 19
10a Setiger 8 with a triangular glandular area on the ventral side; pygidial funnel short or indistinct Clymenura columbiana
10b Setiger 8 without a glandular area on the ventral side; with or without a pygidial funnel 11
11a Pygidium with a funnel 15
11b Pygidium without a funnel 12
15a Setiger 5 and succeeding setigers with obvious glandular rings (these are often lighter than the other portions of these setigers); first neuropodia with a single straight spine Isocirrus longiceps
15b Setiger 5 and succeeding setigers with glandular rings, but these are not conspicuous; first neuropodia with spines or with uncini that are so much modified that their hooklike form is scarcely apparent 16
16a Cirri of pygidial funnel longest midventrally; with fewer than 25 setigers 17
16b Cirri of pygidial funnel all about the same length, and lacking in the midventral region; with more than 31 setigers Macroclymene sp.
17a Setiger 1 fused to the prostomial-peristomial complex; epidermis with a networklike pattern Euclymene reticulata
17b Setiger 1 distinctly separate from the prostomial-peristomial complex; epidermis smooth or ringed 18
18a Lateral notches in rim of cephalic plate distinct; setiger 1 with spines, setigers 2 and 3 with modified uncini (the bent tips of these are toothed); cirri of pygidial funnel of unequal length, the longer ones alternating with the shorter ones.
This species is close to E. zonalis, and is perhaps within the range of variation of the latter; see choice 18b.
Euclymene sp.
18b Lateral notches in rim of cephalic plate indistinct or lacking; setigers 1-3 with spines or with modified uncini; cirri of pygidial funnel all of about equal length Euclymeme zonalis
19a Setiger 1 without neurosetae 20
19b Setager 1 with 5 or more neurosetae 21
21a Anterior edge of setiger 4 with a membranous collar; cirri of pygidial funnel all about the same length Clymenella torquata
21b Anterior edge of setiger 4 without a membranous collar; cirri of pygidial funnel of uneven length; those of the midventral part usually longer than the others (common intertidally in muddy sand) Axiothella rubrocincta

Taxonomic Levels Represented in This Key:

  Clymenella torquata
  Euclymeme zonalis

Page created by Dave Cowles, 2007
Edited by: Dave Cowles, 2014