Chapter 1 - Núria BONADA

Chapter 6
Tordera Basin: ToM6, ToM7, ToM8, ToM10, ToM11, ToM12, ToM15
Besòs Basin: B7a, B8a, B32, B35, B36
Llobregat Basin: L44, L56, L68
Mijares Basin: MI7
Turia Basin: TU1, TU2, TU4
Júcar Basin: JU1, JU7, JU8
DISTRIBUTION AND ECOLOGY
European species. In the Iberian Peninsula it is distributed in central and northern
basins, as in our samples.
This species has a wide ecological range beeing able to survive in headwater and middle
reaches (Vieira-Lanero, 2000) with a permanent flow (Sommerhäuser et al., 1997). In our
samples it has been found in headwaters at high to medium altitude. In these conditions,
larvae appear sensitive to phosphates, suspended solids and conductivity but may be
present in low ammonium concentrations (Bonada et al., Chapter 8).
74- Halesus tessellatus (Curtis, 1834)
MATERIAL STUDIED: 142L
Besòs Basin: B35
Turia Basin: TU1, TU2
Júcar Basin: JU7, JU8
Segura Basin: SE1, SE3, SE4
Adra Basin: AD5
Guadalfeo Basin: GU1, GU5, GU11, GU12, GU15
TAXONOMIC REMARKS
Although we did not find pupae or adults from H. tessellatus in the sampled basins,
Zamora-Muñoz & Alba-Tercedor (1995) indicated the presence of this species in the
Iberian Peninsula. The larvae examined correspond to this species according to Panzeböck
& Waringer (1997), even assuming difficulties found to differentiate H. tessellatus from H.
digitatus. Pupae and adult material should be analyzed to confirm the presence of H.
tessellatus in northern basins, where we only found larval specimens.
DISTRIBUTION AND ECOLOGY
European species with some records in Siberia (Lepneva, 1971). In the Iberian Peninsula
it has been recorded until now only in southern areas.
In our sampled basins, H. tessellatus has been collected in mountain pristine headwaters
with a low conductivity (Zamora-Muñoz & Alba-Tercedor, 1995), but it has been collected
in high saline water in central Europe (Botosaneanu & Malicky, 1978). In the
Mediterranean sampled basins it appears to be more sensitive to ammonium, phosphates,
suspended solids and conductivity than H. radiatus (Bonada et al., Chapter 8).
Stenophylax Kolenati, 1848
Many difficulties are found to identify Stenophylax species in the Iberian Peninsula, because not
all the recorded species have described larvae. Therefore, we only include here few pupae or
adults collected in the studied area. However, larvae of this genus have been found in several
temporary streams in Besòs, Júcar, Segura, Almanzora and Guadalfeo basins.
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