New cocalodine jumping spiders from Papua New Guinea (Araneae: Salticidae: Cocalodinae)
Author
Maddison, Wayne P.
text
Zootaxa
2009
2021
1
22
journal article
10.5281/zenodo.186069
99d44e7b-46c3-47a2-9695-3ea43c4186a0
1175-5326
186069
Subfamily
Cocalodinae
Simon
A median apophysis on the male palpus is a striking rarity in salticid spiders. When present, it is a sclerite just clockwise from the base of the embolus (in a left palp, ventral view), surrounded by hematodocha, and at least partially surrounded by the tegulum (
Wanless 1982
,
1985
; Maddison 2006;
Figs 26
,
57
,
73
). The sperm duct typically approaches it before turning counter-clockwise into the embolus.
Wanless (1982)
assumed the median apophysis was derived within salticids and thus was evidence that
Cocalodes
,
Allococalodes
, and the African
Holcolaetis
Simon
and
Sonoita
Peckham and Peckham
form a monophyletic group. However, the median apophysis is probably ancestral for salticids, based on its widespread presence throughout araneomorph spiders (
Coddington 1990
), in particular among families related to salticids (e.g.
Bosselaers & Jocqué 2002
;
Ramírez 2003
;
Silva 2003
;
Benjamin
et al.
2008
), and based on its distribution among basal salticids in recent molecular phylogenies (
Maddison & Needham 2006
,
Maddison
et al.
2007
). If so, then the presence of a median apophysis does not indicate to what clade a salticid belongs, but rather to what clades it doesn't belong — a salticid with a median apophysis is a member of neither the Salticoida nor the
Spartaeinae
, both of which have lost it. [The sclerite reported as a "median apophysis" from the salticoid
Tarne
Simon
by
Szûts and Rollard (2007)
is almost certainly not homologous to that in basal salticids:
Tarne'
s sclerite is counterclockwise from the base of the embolus in the left palp ventral view, and is not cradled by the tegulum.]
Wanless (1985)
later preferred the hypothesis that
Holcolaetis
and
Sonoita
formed a clade with the spartaeines to the exclusion of
Cocalodes
. The placement of
Cocalodes
is therefore unresolved.
Wunderlich (2004)
synonymized the
Spartaeinae
with the
Cocalodinae
, choosing Simon's family-group name Cocalodeae because of priority over Wanless's name
Spartaeinae
. I reject this synonymy primarily because
Cocalodes
can be excluded from the
Spartaeinae
in Wanless's strict sense (1984) because it lacks two spartaeine synapomorphies, a tegular furrow and loss of the median apophysis. Even if these cocalodines and the spartaeines were found to be sister groups, we could still retain them as separate, as I do here. Wunderlich's broad sense of
Cocalodinae
, which includes the Baltic Amber salticids, is united as far as we know only by plesiomorphic character states (presence of conductor and median apophysis, many retromarginal cheliceral teeth, large posterior median eyes). Here I take a much more restricted concept of the
Cocalodinae
, to include only the five genera discussed below. The Baltic Amber salticids, other than the hisponines, are therefore
Salticidae
incertae sedis
.
I will not here attempt to resolve the placement of cocalodines in the phylogeny of the
Salticidae
, as I have found no morphological synapomorphies that link it with particular subgroups of salticids. Some of the cocalodines I describe here resemble spartaeines closely in habitus, but this observation is insufficiently precise to provide evidence for relationship.
However, the three new genera described here are provisionally placed within the
Cocalodinae
along with
Cocalodes
and
Allococalodes
. This group has one proposed synapomorphy, the internal sclerotized spheres of the epigynum first reported by Wanless in
Cocalodes
. These are, however, also present in at least a few salticoids (see e.g.,
Galiano 1963
,
1970
:
Tullgrenella morenensis
(Tullgren)
and
Chira gounellei
(Simon))
. These spheres are visible clearly in the new species
Yamangalea frewana
,
Tabuina varirata
,
Tabuina baiteta
,
Tabuina rufa
, and
Cucudeta zabkai
(
Figs 30
,
43, 50
,
61
,
78
; see arrow in
Fig. 43
), but were not seen in
C. uzet
and
C. gahavisuka
(
Figs 82, 86
) and are ambiguous in
Allococalodes madidus
(
Fig. 19
). Additional evidence for the monophyly of the cocalodines comes from preliminary data from the 28S gene, by which
Cocalodes
,
Allococalodes
and the three genera described here are resolved as a monophyletic group (Maddison & Zhang unpublished).