LIII. Descriptions of several new species of Ascidia

Abstract

S1 st MA Y 1824. LIII. Descriptiom of several new Species of Ascidia. B 9 C. A. LvsuEva.* Gr~Ntrs ASCIDIA, Lin. I. A SCIDIA atra. Bod 9 subcylindrie, elongated, arquated, ~" sessile ; the superior part more slender, terminated by two unequal tubes, slightly separate and parallel; these tubes have each a terminal opening, which in the shorter tube is closed by five, and in the longer one by six, triangular valves; the substance of the exterior sac is very firm, almost smooth, opaque, and very deep violaceous or blackish.mIt occurs attached to rocks, amongst Opuntiw, many species of Sertulariw, and broken shells. Its position is inclined, being adherent 10)" the side of the base, which is a little more inflated than the other parts of the body.-We observed this species at the isles of St. Vincent and Guadaloupe, where, however, it is rather rare. Whilst dredging in the bay of Calicoua, we drew this species from the bottom of the water, with many other objects, amongst which was a beautiful Holothuria, marbled with brown, red, white and blackish, which had the property of dissolving so rapidly as to be observed with difficulty. 2. A. cavernosa. Bod 9 oblong, irregular, terminated by two unequal tubes; that of the branchia and mouth nmch longer than the other, and directed upwards; that of the oviduct and excretions situated at the base of tile first and lateral; their apertures are entire, without marginal elevation, or apparent hair, and of a deep colour within ; the exterior envelope is coriaceous, thick, very firm, opaque, rugous and folded, particularly towards the base, where the folds, united in thseiculi, form three points of attachment, by means of which the animal secures itself' firmly to the interior of cavities in rocks and old madrepores; the colour is that of burnt terra

Checklist of the Holothuroidea (Echinodermata) from the State of Paraíba, Brazil

“…Synaptidae Burmeister, 1837 Synaptula Oersted, 1849 Synaptula hydriformis (Lesueur, 1824) ( Figure 1B) Material examined: UFPB/ECH-156, 1 spec., Picãozinho, João Pessoa, PB; UFPB/ECH-157, 1 spec., Picãozinho, João Pessoa, PB; UFPB/ECH-158, 1 spec., Picãozinho, João Pessoa, PB; UFPB/ECH-159, 2 spec., Picãozinho, João Pessoa, PB; UFPB/ECH-160, 1 spec., Recife de São Gonçalo, João Pessoa, PB; UFPB/ECH-161, 2 spec., Picãozinho, João Pessoa, PB; UFPB/ECH-162, 1 spec., Recife de Picãozinho, João Pessoa, PB; UFPB/ECH-163, 1 spec., Picãozinho, João Pessoa, PB; UFPB/ECH-164, 2 spec., Picãozinho, João Pessoa, PB; UFPB/ECH-165, 1 spec., Praia do Cabo Branco, João Pessoa, PB; UFPB/ECH-166, 2 spec., Picãozinho, João Pessoa, PB; UFPB/ECH-167, 2 spec., Picãozinho, João Pessoa, PB; UFPB/ECH-168, 4 spec., Picãozinho, João Pessoa, PB; UFPB/ECH-169, 2 spec., Picãozinho, João Pessoa, PB; UFPB/ECH-1501, 2 spec., Recifes do Seixas, João Pessoa, PB; UFPB/ECH-1554, 10 spec., Recifes do Cabo Branco, João Pessoa, PB; UFPB/ECH-1956, 1 spec., Recife do Seixas, João Pessoa, PB; UFPB/ECH-1958, 1 spec., Recife de São Gonçalo, João Pessoa, PB.…”

“…Type locality: Guadeloupe (Lesueur 1824 Diagnosis: Body narrow, cylindrical, may attain about 20 cm in length. Tube feet distributed into indistinct bands, ventrally cylindrical, dorsally partially papilliform.…”

Rapid establishment of the non-indigenous ascidian Styela plicata and its associated bacteria in marinas and fishing harbors along the Mediterranean coast of Israel

“…However, its correct identification is doubted as it refers to a tunic filled with sand and does not fit the description of the species given by Lesueur (1823). In the past three to four years there have been an increasing number of reports from fishermen and sailors describing the presence of S. plicata on artificial substrates in marinas along the coast of Israel (Shenkar N. pers.…”

“…A growing awareness of these marine introductions has led to the establishment of several monitoring and management programs in the Mediterranean Sea (Katsanevakis et al, 2011). (Lesueur, 1823) (Tunicata; Stolidobranchia; Styelidae) is a solitary ascidian with a global distribution. Its origins are no longer traceable, since it probably invaded different regions of the world a very long time ago by attaching to ship hulls (Pineda et al, 2011).…”

Development of the hectocotylus in <i>Illex coindetii</i> (Verany 1837) (Cephalopoda: Ommastrephidae)

“…Roper et al 1969, Roeleveld, 1988 consider the genus Illex to comprise four spe-cies: Illex illecebrosus (Lesueur 1821), Illex coindetii (Verany 1839), Illex argentinus (de Castellanos 1960), and Illex oxygonius Roper, Lu and Mangold 1969. However, some authors only recognize two species: Illex illecebrosus (including three subspecies illecebrosus, coindetii and oxygonius) and Illex argentinus (Zuev 1966, Nesis 1987. A third concept considers only three species to be valid, with I. oxygonius thought to be the mature male of I. illecebrosus (Nigmatullin 1992, Lipinski pers.…”