THE GENUS ENOCHRUS THOMSON (COLEOPTERA: HYDROPHILIDAE) FROM TURKEY, CHECKLIST AND NEW RECORDS

A review of the Enochrus species recorded from Turkey is provided. Twelve species of the genus recorded by previous authors are summarized, Enochrus halophilus (Bedel) and Enochrus politus (Kuster) are recorded for the first time to the Turkish fauna and additional some records are provided from the country. Diagnostic characters of some species as well as the photographs of their aedeagophores are provided. Several species known previously from only a few localities in Turkey have been shown to have much wider distributions in the country.


INTRODUCTION
The aquatic Coleoptera of the genus Enochrus Thomson are among the commonest species of the European hydrophilids that they have rather many species, of which some usually occur in high numbers on the suitable localities.Their taxonomy is still poorly known, and in consequence many species are confused and many old records are based on misidentification, especially in ecological studies conducted by nonspecialists.As a result of this, the distribution, biology as well as ecological characteristics are only vaguely known even for the common species.Inadequate identification of the species also makes comparison between works of different authors virtually impossible (Ribera et al., 1997).
The aim of this paper is to summarize all known data on the Enochrus species from Turkey, and add some new data from Turkey.

MATERIALS AND METHODS
Samples were collected from the edge of various water bodies with a sieve, a ladle and a net having meshes size of 1 mm.The beetles were killed with 70% alcohol, and in the laboratory were cleaned off from clayey and muddy substances with a small paintbrush.The aedeagophore was dissected under a stereomicroscope.
The newly recorded species was described and photographs of important aedeagus showing diagnostic taxonomic characters were taken.The classification reported by Hansen (2004)  Records in Turkey: Aksaray, Erzincan (İncekara et al., 2005;Darılmaz and Kıyak, 2006).
Range: A western Palaearctic species, ranging from North Africa and Spain across Europe including Scandinavia to Turkey and Israel (Hansen 2004).

Enochrus
Range: A western Palaearctic species ranging from Europe to the Near East and Central Asia (Hansen, 2004).

Enochrus (L.) halophilus (Bedel, 1878)
Synonyms: Philydrus halophilus Bedel, 1878; Philydrus salinus Kuwert, 1888; Philydrus brevipalpis Sharp, 1914 Diagnosis: Body length 4.5 -5.5 mm.Head paler, frons rather pale; labrum pale, in male often darkened in medially.Pronotum, however, not black in middle with a large brownish rather vaguely demarcated spot.Maxillary palpi uniformly reddish yellow and apex of terminal segment indistinct brown.Ventral surface yellowish to brown.Very similar to E. fuscipennis and E. quadripunctatus.One constant feature that can also be used in the identification is the coloration of the pronotum, without a defined dark spot in middle, unlike E. fuscipennis and E. quadripunctatus.Aedeagus is on Fig. 1.

Range:
The distribution area of this species includes most of northern and central Europe and Cyprus (Hansen, 2004).
Remarks: E. halophilus is here recorded from Turkey for the first time.
Range: A Palaearctic species ranging from Europe to eastern Siberia (Hansen, 2004).
Remarks: E. ochropterus had not been included to Turkish fauna by Hansen (2004).However it was reported from Turkey for the first time by Chiesa (1964).

Range: South Mediterranean species ranging from
Mediterranean species ranging from species ranging from Spain to North Africa and Syria and Israel, reaching Afghanistan (Hansen, 2004).

Enochrus (L.) quadripunctatus (Herbst, 1797)
Records in Turkey: Ordu (Mart et al., 2009) Range: A widespread Palaearctic species, common especially in central and northern Europe, reaching as far as Greece in the south and Russian Far East in the east (Hansen, 2004;Hebauer & Ryndevich, 2005).

Remarks:
The first record of E. coarctatus from Turkey was given by Mart et al. (2009).In this study the second record is given for the country.
Range: A Palaearctic species, ranging from Great Britain, France and Spain across Iran and Turkey to western Siberia and Kazakhstan, and North Africa (Hansen, 2004).

Remarks:
The first record of E. nigritus from Turkey was given by Schödl (2002).In this study the second record is given for Turkey.Also this species is new to the Anatolian region.

CONCLUSION
This publication includes records of the species E. halophilus and E. politus new to Turkey, bringing the total number of species known from Turkey to 14 species of the genus Enochrus.Furthermore this study includes exact locality of the species of E. salomonis.Two species, E. bicolor and E. quadripunctatus, known previously from only Anatolian part in Turkey have been shown to inhabit the European part of Turkey, in the Marmara region.Although the water beetle fauna of Turkey is now better known, more studies are required to better understand the overall distribution.