Marine Gastrotricha from Sicily with the description of a new species of Chaetonotus

Italian Journal of Zoology ISSN: 1125-0003 (Print) 1748-5851 (Online) Journal homepage: http://www.tandfonline.com/loi/tizo20 Marine Gastrotricha fr...
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Italian Journal of Zoology

ISSN: 1125-0003 (Print) 1748-5851 (Online) Journal homepage: http://www.tandfonline.com/loi/tizo20

Marine Gastrotricha from Sicily with the description of a new species of Chaetonotus Maria Balsamo , Elena Fregni & Paolo Tongiorgi To cite this article: Maria Balsamo , Elena Fregni & Paolo Tongiorgi (1996) Marine Gastrotricha from Sicily with the description of a new species of Chaetonotus , Italian Journal of Zoology, 63:2, 173-183, DOI: 10.1080/11250009609356127 To link to this article: http://dx.doi.org/10.1080/11250009609356127

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Date: 22 January 2017, At: 14:33

Ital. J. Zool., 63: 173-183 (1996)

Marine Gastrotricha from Sicily with the description of a new species of Chaetonotus MARIA BALSAMO Dipartimento di Scienze della Produzione animale, Università di Udine, via S. Mauro 2, I- 33010 Pagnacco, Udine (Italy)

ELENA FREGNI PAOLO TONGIORGI Dipartimento di Biologia animale, Università di Modena, via Università 4, I-41100 Modena (Italy)

INTRODUCTION Preliminary data on gastrotrich fauna from Sicily, only concerning the northern coast of the island (Todaro & Balsamo, 1990), were completed with the results of a collecting campaigne carried out during the summer of 1994. This study follows similar surveys which touched Sardinia (Todaro et al, 1988; Balsamo et al, 1995) and some Italian minor islands.- Elba, Giglio, Capraia and Montecristo in the Tuscan Archipelago (Balsamo et al., 1992; Todaro era/., 1992; Balsamo etal., 1994), Ponza in the Pontine Archipelago and Ischia and Procida in the Campania Archipelago (Todaro, 1992; Hummon & Todaro, personal communication). Research on the gastrotrich fauna from island coasts completes the faunistic and zoogeographic studies on the marine species of this phylum which have been carried out in the past along the Italian peninsular coasts (for the latest works see Hummon et al., 1992, 1993; Todaro et al, 1992; Evans et al., 1993; Hummon et al, 1996). MATERIALS AND METHODS Collecting time and sites

ABSTRACT Forty-one species (25 Macrodasyida and 16 Chaetonotida) are reported from the coasts of Sicily. Among the Chaetonotida, Chaetonotus sp. 3 Valbonesi & Luporini, 1987 is redescribed and redrawn from specimens collected from sublittoral sediments of Giardini Naxos (Taormina), and is named Chaetonotus luporinii.

Marine sediments were sampled during four collecting campaignes, carried out in July and September 1989 and in May and June 1994, respectively. Twenty-one sites were touched (10 on the northern coast, 7 on the southern coast and 4 on the eastern coast): they are listed below and represented in Figure 1. As a rule a sample of sediment was taken at each site from a depth varying between 1 and 3 m (sublittoral samples). At five sites two samples were collected, the second of which from the water-line (littoral samples). The sampling dates, the water depth of the sublittoral samples and the grain size of the sediment at the collecting sites are given in parentheses. 1. Giardini Naxos, Taormina (VI.1994: littoral sample, medium sand; 2-3 m depth, coarse sand); 2. Agnone Bagni, Catania (V.1994: littoral sample, medium and 2-3 m depth, fine sand mixed with silt); 3. Lido Arenella, Siracusa (V.1994: 1-2 m depth, medium sand); 4. Rada di Portopalo, Capo Passero (V.1994: 2-3 m depth, fine sand); 5. Pozzallo, Marina di Ragusa (V.1994: 1-2 m depth, fine sand); 6. Punta Braccetto, Marina di Ragusa (V.1994: 1-2 m depth, fine sand); 7. Manfria, Gela (V.1994: littoral sample, medium sand mixed with silt; 2-3

TYRRHENIAN SEA

KEY WORDS: Gastrotricha - Marine meiofauna - Mediterranean fauna - Sicily - Italy. ACKNOWLEDGEMENTS This study falls within a larger research programme designed to investigate the marine fauna of the western Mediterranean area, and supported by a grant from the Italian Consiglio Nazionale delle Ricerche (C.N.R. contract 90.03258.CT-04, 91.00673.CT-04) to P. Tongiorgi and the Italian Ministero dell'Universita e della Ricerca Scientifica e Tecnologica (Programme MURST 40% «Popolamento animale del Mediterraneo oecidentale»). (Received 14 February 1996 - Accepted 28 March 1996)

MEDITERRANEAN SEA

Fig. 1 - Location of sampling sites.

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M. BALSAMO, E. FREGNI, P. TONGIORGI

m depth, fine sand); 8. Agrigento (V.1994: 1 m depth, fine sand); 9. Porto Palo, Mazara del Vallo (IX.1989: 1-2 depth, fine sand; V.1994: littoral sample, fine sand; 1-2 m depth, fine sand); 10. Lido Signorino, Marsala (V.1994: 2-3 m depth, fine sand); 11. Island of Favignana, Egadi Islands (IX.1989: 1-2 depth, very fine sand); 12. S. Vito lo Capo, Trapani (IX.1989: littoral sample, fine sand; 1-2 m depth, fine sand); 13. Trappeto, Palermo (V.1994: 2-3 m depth, fine sand); 14. Spiaggia Salinelle, Cefalu (VI.1994: 2-3 m depth, medium sand mixed with silt); 15. S. Ambrogio, Cefalu (IX.1989: 2-3 m depth, fine sand); 16. Capo d'Orlando (IX.1989: 1-2 m depth, medium sand); 17. Mongiove, Messina (VI.1994: 2-3 m depth, medium sand); 18. Jesi, Island of Vulcano, Eolie Islands (VII. 1989: 1-2 m depth, TABLE I - Macrodasyids found along the coasts sampled during the collecting trips.

Macrodasyida

DACTYLOPOLIDAE Dactylopodola D. typhle LEPIDODASYIDAE Mesodasys M. adenotubulatus MACRODASYIDAE Macrodasys M. caudatus THAUMASTODERMATIDAE Acanthodasys A. aculeatus Diplodasys D. ankeli Pseudostomella P. etrusca Ptychostomella P. mediterranea P. tyrrhenica Tetranchyroderma T. anomalopsum T. heterotubulatum T. hypopsilancrum T. papii T. polyprobolostomum T. sardum T. tanymesatherum T. thysanophorum T.sp. Thau mastoderma T. mediterraneum T. ramuliferum TURBANELLIDAE Paraturbanella P. dohrni P. pallida P. teissieri Turbanella T. ambronensis T. cornuta T. thiophila

Total

25

North

South

East

coarse sand); 19. Castroreale, Milazzo (VI. 1994: 2-3 m depth, very coarse sand); 20. Spadafora, Messina (IX.1989: 2-3 m depth, medium sand); 21. Torre Faro, Messina (VI.1994; 1-2 m depth, coarse sand). Methods Sampling and study methods are described in Todaro et al. (1992). Grain size analysis of sediments was carried out according to Giere et al. (1988) using sieves with mesh sizes of 4, 2, 1, 0.500, 0.250, 0.125 and 0.063 mm. Parameters were calculated by a computer software programme based on the Seward-Thompson & Hails (1973) equation. The total organic matter in the sediment was measured according to Giere et al. (1988). Morphometric parameters, which are the basis of the taxonomy at species level, are given for those species new to Italian fauna, while for others they have only been indicated where they contrasted with data in the literature. Since most gastrotrich species have a broad geographic distribution, we chose to limit our indications to that along the Italian coasts. Photographic negatives of holotypes and paratypes are deposited at the Museo Civico di Storia Naturale of Verona (Italy). Abbreviations TL, total length; PhL, pharynx length; FuL, furca length. TABLE II - Chaetonotids found along the coasts sampled during the collecting trips.

Chaetonotida

South

CHAETONOTIDAE Aspidiophorus A. mediterraneus A. paramediterraneus Chaetonotus Euchaetonotus C. (E.) apechochaetus C. (E.) apolemmus C. (E.) siciliensis Hystricochaetonotus C. (H.) lacunosus C. (H.) variosquamatus Schizochaetonotus C. (S.) dispar C. (S.) luporinii n. sp. Halichaetonotus H. aculifer H. paradoxus H. spinosus H. thalassopais Heterolepidoderma H. loricatum XENOTRICHULIDAE Heteroxenotrichula H. squamosa Xenotrichula X. intermedia

•0-

14

North

12

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