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Butlleti 74.P65 Butll. Inst. Cat. Hist. Nat., 74: 113-116. 2006 ISSN: 1133-6889 GEA, FLORA ET FAUNA Notes breus (fauna) Macromia splendens i Gomphus grasli- tats on s’havia observat la presència d’exem- nii, dues noves espècies d’odonats per plars adults. Es van trobar nombroses exúvies de Gomphus graslinii i un total de vuit exúvi- a Catalunya es pertanyents a Macromia splendens. Aquestes troballes confirmen la presència i la Macromia splendens and Gomphus reproducció de Macromia splendens i Gomphus graslinii a Catalunya i caracteritzen dos nuclis graslinii, two new species of odonata poblacionals coneguts fins al moment: l’un al for Catalonia riu Algars i l’altre al riu Canaletes. Aquestes citacions eleven el nombre d’espècies d’odo- Rebut: 04.12.07 nats citades a Catalunya a 69 (si es té en Acceptat: 01.04.08 compte la nova citació d’Orthetrum chrysos- tigma, Luque & Serra, en prep.). Aquestes es- El dia 15 de juny de 2007 i en el decurs d’una pècies es caracteritzen per la seva raresa, una prospecció faunística a la zona del Parc Natural limitada àrea de distribució i un elevat grau de dels Ports de Tortosa-Beseit, els autors d’aques- protecció legal, ja que totes dues es troben in- ta nota van capturar i identificar, al riu Algars, closes dins de l’annex II del Conveni de Berna dins del terme d’Arnes, un exemplar femella de com a espècies «estrictament protegides»; Macromia splendens. Aquesta citació és la pri- també figuren a la Directiva 92/43 (21/05/92) mera del gènere per a l’odonatofauna catalana. de la Unió Europea, Directiva Hàbitat, inclo- En sortides posteriors i encara en el mes de ses a l’annex II com a «espècies d’interès co- juny, es va observar la presència a la mateixa munitari per a la preservació de les quals localitat de tres exemplars mascles de Macro- s’han de designar zones especials de conser- mia splendens i d’un altre individu al riu Ca- vació» i a l’annex IV com a «espècies animals naletes, dins del terme d’Horta de Sant Joan. d’interès comunitari que requereixen una pro- També al riu Algars i en una altra localitat tecció estricta». En l’àmbit estatal, totes dues propera, al riuet de les Valls, un barranc aflu- estan incloses al Libro rojo de los invertebra- ent del mateix riu Algars, es van localitzar dos españoles, on Macromia splendens està tres exemplars mascles adults d’una altra es- considerada, segons els criteris de la UICN, pècie no citada fins al moment en el territori «en perill crític», i Gomphus graslinii, «en català: Gomphus graslinii. Amb l’objectiu de perill» (Ocharan et al., 2006a, 2006b). confirmar la presència d’aquestes espècies i buscar exúvies de larves per tal de ratificar la Macromia splendens (Pictet 1843) seva reproducció en aquestes zones, es va re- alitzar un mostreig, amb la col·laboració dels Aquesta espècie es considera una relíquia membres del grup Oxygastra (Grup d’Estudi del Terciari. Habitualment es troba en zones dels Odonats de Catalunya), en totes les locali- amb un clima temperat, en rius amb poc cor- 113 GEA, FLORA ET FAUNA FIGURA 1. Exemplar femella de Macromia splendens capturat al toll del Vidre. rent i vegetació abundant, en molts casos en França. La citació més antiga d’Espanya és la llocs poc accessibles (Cordero, 2000). Viu en d’una localitat a Sogorb (Castelló) (Navas, zones d’altituds baixes, de menys de 500 m, 1923) i, més recentment, ha estat citada a Ca- encara que a Espanya s’han localitzat pobla- dis (Ferreras, 1983; Agüero et al., 1998), a cions fins als 700 m d’altitud (Grand, 2006). Càceres (Benítez & García, 1989; Blanco & Tant la larva com l’adult són molt sensibles a les de Castro, 1995), Galícia (Cordero et al., alteracions del medi on viuen (Dommanget, 1999; Cordero, 2000) i Àlaba (Ocharan, com 1980), motiu pel qual es requereixen mesures per pers.). Les dues localitats de Catalunya perta- garantir la conservació de les seves poblacions. nyen a la comarca de la Terra Alta i es troben El seu període de vol és curt, de sis a deu dins del Parc Natural dels Ports. setmanes (Cordero et al., 1999), entre la se- gona quinzena de maig i la primera d’agost, Localitat: toll del Vidre, riu Algars, muni- encara que l’espècie és present fonamental- cipi d’Arnes, 31TBF6826, 555 m. ment en els mesos de juny i juliol (Dijkstra, Dates: 15-VI-2007, 23-VI-2007 i 07-VII- 2006). Aquest curt període de vol, juntament 2007. amb factors vinculats a la seva etologia (ali- Exemplars observats: el 15 de juny es va mentació a les zones boscoses properes al lloc observar i capturar un exemplar femella que de reproducció, activitat centrada fonamen- es troba dipositat al Museu Comarcal del talment al llarg del matí i hores centrals del Montsià, amb el número de registre 23.532 dia, etc.) fan que es tracti d’una espècie difícil (fig. 1). Posteriorment, el dia 23 de juny, es de detectar, motiu pel qual presenta una dis- van observar tres mascles i se’n va capturar tribució poc coneguda, tot i que pot arribar a un que presentava un comportament ja descrit ser localment abundant (Cordero, 2000). Pre- per a l’espècie, patrullant amunt i avall d’una senta una reduïda àrea de distribució que in- zona calmada del riu, a 1 m d’alçada damunt clou Espanya, Portugal i el sud i el sud-est de de l’aigua (Cordero et al., 1999). L’espèci- 114 FIGURA 2. Exúvia d’una larva de Macromia splendens agafada al riu Algars. men ha estat dipositat al fons del Museu Co- Gomphus graslini (Rambur, 1842) marcal del Montsià, amb el número de regis- Sembla que aquesta espècie comparteix tre 23.533. Finalment, el dia 7 de juliol, es va l’hàbitat amb Macromia splendens. És una observar un exemplar mascle i es van recollir sis exúvies de larves (fig. 2), dues de les quals espècie rara que es troba en rius d’aigües es troben dipositades al Museu Comarcal del lèntiques i netes, d’estiatge reduït i riberes Montsià, amb el número de registre 23.534. amb una abundant vegetació (Baixeras et al., 2005). El seu període de vol va del maig al Localitat: les Olles, riu Canaletes, munici- setembre i es troba de forma més abundant els pi d’Horta de Sant Joan, 31TBF7636, 350 m. mesos de juliol i agost (Grand, 2006). Tot i Dates: 23-VI-2007 i 7-VII-2007. això, comparteix amb Macromia el desconei- Exemplars observats: el dia 23 de juny, riu xement que es té de la seva biologia, ecologia amunt de la localitat de les Olles, es va obser- i distribució. var un exemplar de sexe no identificat en vol. En la visita del dia 7 de juliol, es van recollir Gomphus graslinii ocupa un territori que quatre exúvies (dues d’elles dipositades en el comprèn el sud-oest de França i la península fons del Museu Comarcal del Montsià, amb el Ibèrica. A Espanya, ha estat citat a Cadis número de registre 23.535). (Ferreras & Cano, 2004), Còrdova i Jaén (Fe- rreras, 1982), Càceres (Blanco & de Castro, En totes dues localitats, els exemplars es 1995), Salamanca, Galícia (Azpilicueta et al., troben en un riu de poc cabal, amb aigües amb 2007) i Navarra (Kéry & Muñoz, 2006). poc corrent, amb una profunditat molt baixa i Les localitats catalanes són les següents: que només assoleix fondàries significatives (de més d’1,5 m) en les olles que s’han format Localitat: aiguabarreig del riu Algars i del per l’erosió del riu i que és el lloc on es loca- riu Estrets, municipi d’Horta de Sant Joan, litzen les exúvies de les larves que confirmen 31TBF7035, 400 m. la reproducció de l’espècie. Dates: 30-VI-2007. 115 GEA, FLORA ET FAUNA Exemplars observats: capturats dos exem- BENÍTEZ, A. & GARCÍA, M. J. 1989 Datos de la bio- logía de algunos anisópteros en la península Ibéria plars mascles, dipositats en el fons del Museu (Odonata, Anisptera). Boletín de la Asociación Es- Comarcal del Montsià, amb els números de pañola de Entomología, 13: 195-200. registre 23.536 i 23.537. BLANCO, I. & DE CASTRO, J. 1995. Los odonatos de la província de Cáceres. Aegypius Monografia 13: Localitat: riuet de les Valls, municipi d’Arnes, 1-61. CORDERO, A.; UTZERI, C. & SANTOLAMAZZA, 31TBF6826, 400 m. C. 1999. Emergence and adult behaviourof Dates: 06-VII-2007. Macromia splendens (Pictet) in Galicia, northwest Exemplars observats: un mascle que es tro- Spain (Anisoptera, Corduliidae). Odonatologica 28(4): 333-342. ba dipositat al Museu Comarcal del Montsià, CORDERO, A. 2000. Distribution, habitat amb el número de registre 23.538. requeriments and conservation of Macromia splendens Pictet (Odonata: Corduliidae) in Galicia Localitat: toll del Vidre, riu Algars, muni- (Northwest Spain). International Journal of cipi d’Arnes, 31TBF6826, 555 m. Odonatology, 3 (1): 73-83. DIJKSTRA, K-D. 2006. Field guide to the dragonflies Dates: 07-VII-2007. of Britain and Europe. British Wildlife Publishing. Exemplars observats: es van recollir nom- Gillingham. broses exúvies (dipositades en el fons del DOMMANGET, J. L. 1980. Vers une protection des odonates (libellules) de France. Un exemple: Museu del Montsià, amb el número de registre Macromia Splendens Pictet. Cahiers Liaison O. P. 23.539, i es va observar un exemplar mascle. I. E., 14: 1-4. FERRERAS, M. 1982. Odonatos de Sierra Morena Localitat: les Olles, riu Canaletes, munici- central (Córdoba): Aspectos tannísticos. Boletín de la Asociación Española de Entomología, 5: 13-23.
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