A new hyporheic Bogidiella (Crustacea, Amphipoda) from Mallorca
ENDINS, n.O 16. 1990. Palma de Mallorca
A NEW HYPORHEIC Bogidiella (Crustacea,
Amphipoda) FROM MALLORCA
by Joan LI. PRETUS1 & Jan H. STOCK2
Resumen
Se describe un nuevo anfípodo hiporreico procedente de los aluviones de,grava del Tor-
rent de Pareis, en Mallorca, como Bogidiella (Bogidiella) torrenticola n. sp. Dicha especie está
estrechamente relacionada con la especie congenérica B. (B.) balearica, forma cavernícola
de la misma isla.
Abstract
In gravel beds of an intermittent stream, Torrent de Pareis, in Mallorca, a new hyporheic
amphipod was found, described as Bogidiella (Bogidiella) torrenticola n. sp. It is closely related
to its congener from the same island, B. (B.) balearica, a cavernicolous species.
lntroduction
The species described in this paper was re
in two previous publications (Stock, 1978: 89; Stock &
related to Bogidiella (B.) balearica Dancau, 1973,
Iliffe, 1987: 43), but was not formally described be-
known from anchihaline cave lakes in eastern Mallorca.
cause the rn'aterial was insufficient.
New material was recently discovered by one of
us (J. LI. P.) in hyporheic waters of the gravel
the Torrent de Pareis, near Sa Calobra, in the North of
Mallorca. This torrent is dry rnost of the year, but the
phreatic level is easily accessible in the brackish lower
reaches of the torrent. Moreover, stagnant, permanent
pools are found both near the mouth of the torrent, and
between huge boulders in the narrower, cany
part upstream. The older material, consisting of a
the first cascade; conductivity 463 pS/cm; 30 Jan. 1988.
single specimen only, was found in brackish ground
1 d (holotype), 1 9 (allotype), 39 paratypes (10 dd,
waters, some 1000 m from the sea. The new collection
20 9
Q , and 9 damaged, unsexed specimens). All in
consists of a considerable number of specimens,
Zoologisch Museurn Amsterdam (ZMA Amph. 108.610),
collected by rneans of a Bou-Rouch biophreatical pump
but for 5 paratypes, which are in the collections of the
in the gravel of a stagnant pool near the first constric-
first author).
tion of the river bed (near the first cascade), over 2 km
Accompanying fauna: Rhipidogammarus sp. (Am
frorn the sea, in entirely fresh ground water. These
phipoda).
' Dept. of Ecology, Faculty of Biology, University of Barcelona, Avda.
DESCRlPTlON
Diagonal 645, 08028 Barcelona, Spain.
lnstitute of Taxonornic Zoology, University of Arnsterdarn,
4766, 1009 AT Arnsterdarn, The Netherlands.

similar to B. (B.) balearica (abbreviated B. b.), with
DISCUSSION
which it will be compared.
We decided that the hyporheic material belongs to
No secondary sexual dimorphism in appendages.
a new species, closely related to, but consistently dif-
Antenna 1 as in B. b. (accessory flagellum 3-
ferent from, B. (B.) balearica Dancau, 1973, mainly be-
segmented, reaching slightly beyond tip of flagellum
cause of the much larger size of the lentiform organ of
segment 2); aesthetascs slightly shorter than cor-
P3 to P7, the longer claw of P3 and P4, the different
responding flagellum segments. Flagellum 7- or 8-
chape and armature of the telson, the different orna-
seg mented.
mentation of the distal spines of the outer lobe of ma-
Antenna 2 (fig. 1) resembling that of B. b., but
xilla l,
and a different armature of the inner lobe of the
gland cone longer and narrower.
maxilliped.
Mandible, palp and inner lobe of maxilla 1, and
maxilla 2 as in B. b. Outer lobe of maxilla 1 with 7
ETYMOLOGY
spines, bearing fewer denticles on inner margin than in
B. b. (from lateral to medial 1-1 -2-1 -0-2-1 denticles).
The specific name is composed of the Latin words
Maxilliped: palp and outer lobe as in B. b., inner lobe
torrens (= stream) and incola (= inhabitant), alluding
(fig. 2) with only 2 bifid spines on distal margin (3 in
to the habitat of the new species.
B. b.).
Gnathopod 1 (fig. 6). Posterior margin of basis
with 1 or 2 long setae (plus 1 shorter subdistal seta).
Acknowledgements
Two palmar angle spines. Palmar index 0.47.
Gnathopod 2 (fig. 7). Basis with 2 long and 1 short
This work has been subventioned by the Ministe-
seta on posterior margin. Two palmar angle spines.
rio de Educación y Ciencia (Madrid) as part of the
Palmar index 0.44.
F.P.I. programme of one of the authors (J. LI. P.).
Oostegites linear; in al1 available females devoid
of setae (diapause stage). Coxal gills as in B. b.
Pereiopods 3 and 4 (figs. 8, 9). Basis, merus, and
Referencec
carpus slightly less armed than in B. b. Lentiform or-
gan ovate, large (length organ ca. 30% of length of
STOCK, J. H. (1978): -A rernarkably variable phreatic arnphipod frorn
basis). In B. b., the organ is circular, and < 20% of
Mallorca, Rhipidogammarus variicauda n. sp.* Bijdr. Dierk.,
48 (1): 89-95.
length of basis. Claw very long and slender (>> 50%
STOCK, J. H. & T. M. ILIFFE (1987): ,cThe status of Bogidiella balea-
of length of propodus, versus S 50% in B. b.).
rica Dancau, 1973, a stygobiont arnphipod frorn Mallorca*. Endins,
Pereiopods 5 to 7 (figs. 10-12). Lentiform organ
13: 39-46.
ovate, large, often with slightly crenulate margins,
> 30% of length of basis (B. b. circular, < 20%).
Carpus of P6 less slender than in B. b. Claw of P5-P7
as in B. b.
Pleopods and epimeral plates as in B. b.
Uropod 1 (fig. 3) resembling that of B. b., pedun-
cle with ventroproximal spine. Uropod 2 as in B. b.
Uropod 3 lost in almost al1 specimens; rami less spino-
se (fig. 4) than in B. b.
Telson (fig. 5) much wider than long (almost as
long as wide in B. b.); medioterminal emargination
widely U-shaped, deep (as in B. 6.). Usually only 1
very long spine (> telson) on each telson lobe, rarely
1 long and 1 short spine (in B. b. 2 long spines).


Figs. 6-9: BogidieIIa (B.) torrenticola n. sp.
6, gnathopod 1 9 (scale a); 7, gnathopod 2 9 (a); 8, pe-
reiopod 3 d
(a); 9, pereiopod 4 d (a).

Figs.