An Updated Classification of the Recent Crustacea
An Updated Classification of the Recent Crustacea
An Updated Classification of the Recent Crustacea
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tained in our classification, although <strong>the</strong>re is reason<br />
to believe that this family was erected to accommodate<br />
what are turning out to be highly derived<br />
males <strong>of</strong> some species <strong>of</strong> <strong>the</strong> Leucothoidae (J. Lowry,<br />
pers. comm.). If true, <strong>the</strong> <strong>An</strong>amixidae will have<br />
to be synonymized at some point. A few workers<br />
asked us to ‘‘correct’’ <strong>the</strong> spelling <strong>of</strong> <strong>the</strong> family<br />
name Liljeborgiidae to Lilljeborgiidae to reflect <strong>the</strong><br />
fact that <strong>the</strong> family name honors William Lilljeborg<br />
(1816–1908). The confusion stems from <strong>the</strong> fact<br />
that Vilhelm Liljeborg changed <strong>the</strong> spelling <strong>of</strong> his<br />
name to William Lilljeborg sometime in <strong>the</strong> early<br />
1860s. When Bate (1862) established <strong>the</strong> genus Liljeborgia,<br />
he used <strong>the</strong> <strong>the</strong>n-correct spelling honoring<br />
Vilhelm Liljeborg. Thus, when Stebbing in 1899 established<br />
<strong>the</strong> family Lilejborgiidae based on <strong>the</strong> genus<br />
Liljeborgia, he was obliged to use this spelling<br />
as well even though, by that time, <strong>the</strong> man was<br />
known as William Lilljeborg (J. Lowry, pers.<br />
comm., and see Vader, 1972). (As an aside, <strong>the</strong><br />
spelling <strong>of</strong> <strong>the</strong> genus Lilljeborgiella, erected by<br />
Schellenberg in 1931, is <strong>the</strong>refore also correct, as<br />
by that time <strong>the</strong> name was William Lilljeborg).<br />
All <strong>of</strong> <strong>the</strong> 67 families that Bellan-Santini (1999)<br />
lists as those that ‘‘ne présent pas actuellement de<br />
problème majeur d’interprétation’’ are included in<br />
our list. Bellan-Santini (1999) also lists ano<strong>the</strong>r 24<br />
families that do present problems, and some <strong>of</strong><br />
those are in our list as well. Some <strong>of</strong> <strong>the</strong> names and<br />
dates attributed to some families differ between our<br />
list and hers as well.<br />
SUBORDER CAPRELLIDEA<br />
Takeuchi (1993) indicated that <strong>the</strong> Caprellidea may<br />
not be monophyletic but stopped short <strong>of</strong> proposing<br />
a new classification <strong>of</strong> <strong>the</strong> group. His results<br />
(Takeuchi, 1993, figs. 1, 5) indicated that <strong>the</strong> phtisicids<br />
are <strong>the</strong> sister group to all o<strong>the</strong>r caprellideans<br />
and that <strong>the</strong> paracercopids are more closely related<br />
to <strong>the</strong> caprellid-caprogammarid line (he did not<br />
deal with <strong>the</strong> parasitic family Cyamidae). Thus, we<br />
have removed <strong>the</strong> family Paracercopidae from <strong>the</strong><br />
superfamily Phtisicoidea and have placed it instead<br />
in <strong>the</strong> superfamily Caprelloidea, leaving <strong>the</strong> Phtisicidae<br />
<strong>the</strong> sole family <strong>of</strong> <strong>the</strong> Phtisicoidea. We saw<br />
this move as preferable to creating yet ano<strong>the</strong>r superfamily<br />
(to contain <strong>the</strong> paracercopids) in an already<br />
taxon-dense suborder. In <strong>the</strong> same year and<br />
in <strong>the</strong> same volume, Laubitz (1993) described two<br />
new caprellidean families (Caprellinoididae and<br />
Pariambidae). She also recognized as valid <strong>the</strong> Protellidae<br />
McCain and tentatively suggested some<br />
evolutionary lines or trends within and leading up<br />
to <strong>the</strong> Caprellidea. Some <strong>of</strong> <strong>the</strong>se ideas differ from<br />
those proposed by Takeuchi (1993), although both<br />
workers recognize <strong>the</strong> same eight families (as does<br />
Bellan-Santini, 1999). Also in that same volume,<br />
Kim and Kim (1993) suggested affinities between<br />
caprellideans and corophioids. Margolis et al.<br />
(2000) have suggested that <strong>the</strong> Cyamidae may be<br />
closer to <strong>the</strong> Caprogammaridae-Caprellidae lineage<br />
ra<strong>the</strong>r than to <strong>the</strong> Caprellinoididae-Phtiscidae line,<br />
as suggested by Laubitz (1993). Several names and<br />
dates have reverted to earlier workers (suggestions<br />
<strong>of</strong> L. Holthuis, pers. comm.). The families Aeginellidae<br />
and Dodecadidae have been deleted, as <strong>the</strong>y<br />
are now considered subfamilies <strong>of</strong> <strong>the</strong> Caprellidae<br />
and Phtisicidae (K. Larsen, pers. comm.; Laubitz,<br />
1993). See also Bellan-Santini (1999).<br />
SUBORDER HYPERIIDEA<br />
Workers familiar with hyperiideans may wonder<br />
why we did not follow <strong>the</strong> revision <strong>of</strong> <strong>the</strong> Hyperiidea<br />
by Vinogradov et al. (1982, with English translation<br />
edited by D. Siegel-Causey appearing in<br />
1996). While that work contains much updated information<br />
concerning <strong>the</strong> biology <strong>of</strong> hyperiideans<br />
and nomenclatural changes below <strong>the</strong> level <strong>of</strong> family,<br />
<strong>the</strong> authors followed, for <strong>the</strong> higher classification,<br />
<strong>the</strong> earlier work by Bowman and Gruner<br />
(1973). Thus, <strong>the</strong> Bowman and Abele (1982) classification<br />
is <strong>the</strong> more current <strong>of</strong> <strong>the</strong> two for higher<br />
level taxa, although workers will want to consult<br />
<strong>the</strong> Vinogradov et al. volume for information within<br />
families and genera (D. Causey, pers. comm.).<br />
Our classification is also consistent with <strong>the</strong> classifications<br />
<strong>of</strong> Schram (1986, which in turn was<br />
based largely on Bousfield, 1983) and Bellan-Santini<br />
(1999). Kim and Kim (1993) suggested that hyperiids<br />
may be related to certain leucothoid members<br />
(Amphilochidae and Stenothoidae) <strong>of</strong> <strong>the</strong><br />
Gammaridea.<br />
SUBORDER INGOLFIELLIDEA<br />
Several workers (e.g., J. Holsinger, pers. comm.)<br />
have pointed out that <strong>the</strong> ingolfiellids and metaingolfiellids<br />
may not justify <strong>the</strong>ir own suborder and<br />
could probably be accommodated within <strong>the</strong> Gammaridea.<br />
Indeed, Bowman and Abele (1982) listed<br />
<strong>the</strong>m alphabetically among <strong>the</strong> o<strong>the</strong>r gammaridean<br />
families. However, Holsinger notes at <strong>the</strong> same time<br />
that this view is not universally shared by o<strong>the</strong>r<br />
amphipod workers, and most workers (e.g., Bellan-<br />
Santini, 1999) continue to treat <strong>the</strong>se two families<br />
as <strong>the</strong> sole members <strong>of</strong> <strong>the</strong> suborder Ingolfiellidea.<br />
Vonk and Schram (1998) argue for maintaining<br />
separate status for <strong>the</strong> group. We have retained<br />
<strong>the</strong>ir separate status pending fur<strong>the</strong>r investigations<br />
into <strong>the</strong> group’s affinities.<br />
ORDER ISOPODA<br />
The diversity <strong>of</strong> and fascination with isopods are<br />
reflected in <strong>the</strong> relatively large number <strong>of</strong> carcinologists<br />
currently working on isopod systematics and<br />
phylogeny. Although it is encouraging to see so<br />
many skilled workers dedicated to resolving questions<br />
<strong>of</strong> isopod systematics, <strong>the</strong>re are negative aspects,<br />
one <strong>of</strong> which is <strong>the</strong> relatively large number<br />
<strong>of</strong> responses we received that contained conflicting<br />
ideas or information. For <strong>the</strong> most part, we have<br />
relied on <strong>the</strong> ra<strong>the</strong>r straightforward list <strong>of</strong> <strong>the</strong> ma-<br />
Contributions in Science, Number 39 Rationale 37