Page 5 - Collective Article_2017

ers of the Mediterranean Sea (Streftaris & Zenetos, 2006), Figure 4 gives two different aspects of the specimen,
was first recorded as a single individual from Maltese wa- which had the following attributes: W = 15.5 g, TL = 107
ters in August 2014 (Deidun et al., 2015). mm, FL = 101 mm, and SL = 87 mm. This specimen,
On the 3 of November, 2016, a second individual which was substantially smaller than the first one caught
rd
of L. sceleratus was caught through rod-fishing (using from Maltese waters (TL = 568 mm), was identified as
artificial bait/lure) from a location situated along the belonging to L. sceleratus due to the regularly-sized dor-
north-eastern coast of the island of Malta (coordinates: sal black spots and its relatively small eye diameter: head
35.958067° N, 14.393400° E). Since the rod in question
was equipped for benthic fishing, it was possible to esti- length ratio equivalent to 0.315. This second confirmed
mate the water depth at the site of capture (10-12 m), with record of L. sceleratus from Maltese waters is hardly sur-
the seabed being largely characterised by dense Posidonia prising given the steady establishment of the species in
oceanica (L.) Delile meadows. At the time of capture, the the Central Mediterranean. In fact, the species has previ-
individual was in a bloated state, with the swelling gradu- ously been recorded from the entire Tunisian coast (Ben
ally fading away during cold preservation. Souissi et al., 2014).

Fig. 4: Different aspects (bloated state on top, at the time of capture [A, and un-bloated state at the bottom after cold preservation
[B]) L. sceleratus individual caught in Maltese waters.

3. ITALY
3.1 New records of alien species from fouling assemblages of Livorno port

J. Tempesti & J. Langeneck

Regular sampling surveys of fouling assemblages pleonites 1-5 fused medially but not laterally; ii) uropod
along the docks of the port of Livorno (43.54871°N, exopods with distal concavity on mesial margin; and iii)
10.29763°E) revealed the occurrence of three previously pleotelson not exceeding the tip of uropod endopods.
overlooked alien or cryptogenic species. On December Anteaeolidiella lurana can be identified among congeneric
13 2013 two individuals of Syllis pectinans Haswell, species because of its i) whitish background colour with
th
1920 (Fig. 5A, B, C) were sampled in fouling communities bright orange drawings; ii) orange rhinophores with white
dominated by Mytilus galloprovincialis Lamarck, 1819. tip; and iii) pale orange cerata with pale tip and a bright
This species can be distinguished easily from the other white ring approximately in the middle (Carmona et
congeneric polychaetes occurring in the Mediterranean al., 2014). All material was fixed and preserved in 70%
Sea because of its i) compound chaetae with unidentate ethanol and deposited in the collection of the Department
blade (Fig. 5C); ii) backward position of the pharyngeal of Biology, University of Pisa.
tooth (Fig. 5B); and iii) peculiar colour pattern, with Syllis pectinans was described from the Pacific Ocean,
a thin, black bar on the posterior edge of the anterior and subsequently reported from the western (San Martín,
chaetigers (Fig. 5A) (San Martín, 2003). Additionally, 2003) and eastern Mediterranean Sea (Çinar et al., 2008);
on November 10 2015, two individuals of the isopod our record represents the first one for this species from the
th
Paranthura japonica (Richardson, 1909) (Fig. 5D) and Central Mediterranean Sea, as well as the first occurrence
five individuals of the nudibranch Anteaeolidiella lurana in Italian waters.
(Ev. Marcus & Er. Marcus, 1967) were collected (Fig. Paranthura japonica, firstly described from
5E). Paranthura japonica can be distinguished from the Hokkaido Island (Japan), was recently discovered in the
native and often co-occurring Paranthura nigropunctata southern Bay of Biscay and, subsequently, it was reported
(Lucas, 1846) by the following morphological features: i) from several Mediterranean areas, such as Venice and

Medit. Mar. Sci., 18/1, 2017, 179-201 183