Research Article |
Corresponding author: Gaël P. J. Denys ( gael.denys@mnhn.fr ) Academic editor: Jan Kotusz
© 2022 Emma Duquenne-Delobel, Ignacio Doadrio, Gaël P. J. Denys.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Duquenne-Delobel E, Doadrio I, Denys GPJ (2022) Revalidation of the genus Ichthyocoris Bonaparte, 1840 (Actinopterygii: Blenniiformes: Blenniidae). Acta Ichthyologica et Piscatoria 52(1): 35-41. https://doi.org/10.3897/aiep.52.79458
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Combtooth blennies belonging to the genus Salaria were known to have marine and freshwater species. However, recent molecular studies highlighted this genus as paraphyletic, clearly distinguishing both marine and freshwater species. In this paper, we revalidate the genus Ichthyocoris, which corresponds to the freshwater species: Ichthyocoris atlantica (Doadrio, Perea et Yahyaoui, 2011), new combination, Ichthyocoris economidisi (Kottelat, 2004), new combination, and Ichthyocoris fluviatilis (Asso y del Rio, 1801), new combination. It is distinguishable by the presence of brownish bars on the flanks not contrasted with black dots conferring a marble coat, a dorsal fin slightly notched between spined and soft rays (except for I. atlantica), 16–18 dorsal-fin soft rays, 16–20 anal-fin soft rays, 34–38 vertebrae, 8–9 circumorbital pores, 8–11 preopercular pores, and 3 supratemporal pores. The genus Salaria corresponds to the marine species Salaria basilisca (Valenciennes, 1836) and Salaria pavo (Risso, 1810).
combtooth blennies, generic concept, integrative taxonomy, Salaria
Combtooth blennies are small benthic fish belonging to the family Blenniidae with a worldwide distribution in the marine environment, but some taxa are also encountered in fresh or brackish waters. They inhabit coastal, intertidal, rocky areas, coral reefs, and mangroves. Blenniids are divided into five subfamilies, 57 genera, and almost 400 species (
In this study, we focused on the genus Salaria Bath [ex Forsskål], 1977 (see
The genus Salaria has also a complex taxonomic history: these blennies species belonged first to the genus Blennius Linnaeus, 1758 (see
The type species of the genus Salaria Bath [ex Forsskål], 1977, designated by
The generic concept is widely discussed by
In order to distinguish genera, we did a bibliographical review of diagnoses published (
Abbreviations used. GBIF, Global Biodiversity Information Facility; ICZN, International Code of Zoological Nomenclature;
Comparative material. Salaria basilisca (Valenciennes, 1836): Italy • 1; Syntype of Blennius basiliscus; Mediterranean Sea at Genoa;
Salaria pavo (Risso, 1810): France • 3; Mediterranean Sea at Nice;
Family Blenniidae
Feminine gender
Salarias varus Risso, 1827.
Salariopsis Vecchioni, Ching, Marrone, Arculeo, Hundt et Simons, 2022 (see remarks below).
Three species: Ichthyocoris atlantica (Doadrio, Perea et Yahyaoui, 2011), new combination; Ichthyocoris economidisi (Kottelat, 2004), new combination; Ichthyocoris fluviatilis (Asso y del Rio, 1801), new combination.
Ichthyocoris atlantica: MOROCCO • 1; Ouerrha River at Ouazzane;
Ichthyocoris economidisi: GREECE 10; Lake Trichonis;
Ichthyocoris fluviatilis: FRANCE • 2; Têt River at Perpignan; 42°42′21′′N, 002°54′04′′E; Persat and Denys coll. leg.;
Ichthyocoris is distinguishable from Salaria by the presence of brownish bars on the flanks not contrasted with black dots conferring a marble coat (Fig.
Character | Ichthyocoris | Salaria | |||
---|---|---|---|---|---|
I. atlantica | I. economidisi | I. fluviatilis | S. basilisca | S. pavo | |
Dorsal-fin rays | XII–XIII 16–17 | XII–XIII 16–17 | XII–XIII 16–18 | XI–XIII 23–27 | XI–XIII 21–24 |
Anal-fin rays | II 16–17 | II 16–20 | II 16–20 | II 24–28 | II 20–26 |
Vertebrae | 34 | 36–37 | 34–38 | 40–44 | 38–42 |
Teeth upper jaw | 13–15 | 25–30 | 16–24 | 25–33 | 19–28 |
Teeth lower jaw | 14–16 | 20–27 | 16–20 | 22–28 | 16–23 |
Circumorbital pores | 8–9 | 9 | 8 | 6–7 | 7 |
Preopercular pores | 8–9 | (9)10–11 | 9–10 | 6–8 | 6–8 |
Supratemporal pores | 3 | 3 | 3 | 2 | 2 |
Lateral view of Ichthyocoris spp.: I. atlantica,
Ichthyocoris is present in drainages of the Mediterranean basin, in catchments of the Atlantic coast in Morocco and Spain as well as in the Black Sea.
All Ichthyocoris species occur in freshwaters. However, due to their marine ancestry, I. fluviatilis has a one-month planktonic larval phase (
Comparing our diagnosis with the description of Salarias varus from
Other characters may discriminate between both genera:
In a recent study,
1 | Gill opening wide, branchiostegal membrane not fused with the body | 2 |
– | Gill opening restricted to the side of the head, branchiostegal membrane fused with the body | 11 |
2 | Absence of supraorbital tentacles | 3 |
– | Presence of supraorbital tentacles | 5 |
3 | Triangular, fleshy skin flap in the anterior neck area. Canines only in the lower jaw. | Coryphoblennius |
– | No triangular, fleshy skin flap in the anterior neck area. Canines in both jaws | 4 |
4 | 13 pectoral-fin rays. Body laterally compressed posteriorly. Relatively large mouth with a thick upper lip. General body color yellowish with dark brownish vertical bars. Dark brownish eyespot behind the eye. Mature males without bright coloration on cheeks | Lipophrys |
– | 12 pectoral-fin rays. Body well compressed laterally. Small mouth with thin lips. Absence of eyespot behind the eye. Mature males with bright yellow cheeks | Microlipophrys |
5 | Canines in both jaws | 6 |
– | Canines only in the lower jaw | Scartella |
6 | Presence of teeth on the vomer | 7 |
– | Absence of teeth on the vomer | 9 |
7 | Supraorbital tentacles well developed, 3 mm in height minimum. Orbital canal with 2–3 rows of pores. I 4 pelvic fin rays. Male without any neck crest | Aidablennius |
– | Supraorbital tentacles hardly visible, less than 3 mm in height. Orbital canal with only one row of pores. I 3 pelvic fin rays. Male with neck crest | 8 |
8 | Presence of brownish bars on the flanks not contrasted with black dots conferring a marble coat. Dorsal fin notched between spined and soft rays (except for I. atlantica). 16–18 dorsal fin soft rays. 16–19(20) anal fin soft rays. 34–38 vertebrae. 8–9 circumorbital pores. 8–11 preopercular pores. 3 supratemporal pores | Ichthyocoris |
– | Brownish bars on the flanks very contrasted with blue stripes and dots conferring a marble coat. Dorsal fin not notched between spined and soft rays. 21–27 dorsal fin soft rays. 20–28 anal fin soft rays. 38–44 vertebrae. 6–7 circumorbital pores. 6–8 preopercular pores. 2 supratemporal pores | Salaria |
9 | 12 pectoral fin rays | Bathyblennius |
– | 13–14 pectoral fin rays | 10 |
10 | 14 pectoral fin rays. Presence of tentacles on the anterior nostril | Parablennius |
– | 13 pectoral fin rays. Absence of tentacles on the anterior nostril | Lupinoblennius |
11 | Presence of canines in both jaws | Hypleurochilus |
– | Absence of canines in either jaw | 12 |
12 | Body skin loose and flaccid, encompassing dorsal and anal fins. XII–XIV dorsal fin pines | Chalaroderma |
– | Body skin not loose and flabby, not reaching over the fins. XI–XII dorsal fin pines | 13 |
13 | The skin of the dorsal fin extends over to the proximal quarter of the caudal | Chasmodes |
– | The skin of the dorsal fin does not extend to the caudal | 14 |
14 | IX–X 25 dorsal fin rays. 24 anal-fin soft rays. 15–16 pectoral fin rays | Parahypsos |
– | XI–XII 15–18 dorsal fin rays. 12–20 anal fin soft rays. 13–15 pectoral fin rays | Hypsoblennius |
This work was supported by the Muséum national d’Histoire naturelle, the Unité PatriNat 2006 and the UMR BOREA 8067. We thank the curators from the