Sabatieria paraspiculata, Botelho, Alessandra Prates, Silva, Maria Cristina Da, Esteves, André Morgado & Fonsêca-Genevois, Verônica, 2007

Botelho, Alessandra Prates, Silva, Maria Cristina Da, Esteves, André Morgado & Fonsêca-Genevois, Verônica, 2007, Four new species of Sabatieria Rouville, 1903 (Nematoda, Comesomatidae) from the Continental Slope of Atlantic Southeast, Zootaxa 1402, pp. 39-57 : 46-49

Sabatieria paraspiculata sp.nov. ( Figure 4 and 5)

Description

Studied material: 1 holotype male; 1 allotype female. Type material: Male holotype MNRJ 307; Female allotype: MNRJ 308. Type locality: Campos Basin (Rio de Janeiro, Pernambuco, Brazil), 1050 and 1650 m depth, silt­clay sediments.

Measurements: see table 3.

TABLE 3. Measurements (μm) of Sabatieria paraspiculata sp. nov.

Etymology: The specific name paraspiculata refers to the similarity with S. spiculata : greek para = similar; spiculata = S. spiculata .

Male:

Body cylindrical. Punctated cuticle with transversal rows of dots and lateral differentiation of larger and wider spaced dots. Head rounded and attenuated, with six minute internal labial papilliform sensilla, six external minute labial setae and four short cephalic setae. Buccal cavity small and cup­shaped. Amphidial fovea spiral with three turns and occupying 77% of the corresponding body diameter. Pharynx clavate anteriorly surrounding posterior part of stoma then gradually expanding towards the posterior end, but without distinct bulb. Nerve ring and secretory­excretory pore located at the middle of pharynx. Cardia small and pearshaped. Ventral gland situated posterior to the pharynx. Reproductive system diorchic, testes opposed and outstretched; anterior testis on the left and posterior one on the right of the intestine. Four pairs of ejaculatory glands anterior to spicules.Curved spicules with proximal part containing septum; Gubernaculum short, with a narrow dorsal apophysis. There are several glandular cells located around the spicules. Seven minutes poreshaped precloacal supplements. Tail short and stout, with 3 caudal glands ending in a spinneret.

Female:

Females largely similar to the male, but longer. Six internal labial sensilla, six external labial setae and four short cephalic setae. Amphidial fovea spiral with three turns occupying 50% of the corresponding body. Buccal cavity small and cup­shaped. Clavate pharynx, gradually expanding posteriorly but without basal bulb.

Nerve ring surrounding pharynx located at the middle of pharynx. Cardia small. Ventral gland located posteriorly to the pharynx. Reproductive system didelphic­amphidelphic, with two relatively short outstretched ovaries. Vulva at 46% of the total body length from anterior end, and possesses the similar cuticularized structure wich is present in S. spiculata (figure 2F). Tail short and stout with three caudal glands ending in a spinneret.

Diagnosis

S. paraspiculata sp.nov. is characterised by the combination of length and maximum diameter, de Man’s index a (L= 1080 ɗ 1540 Ψ; M = 51 ɗ 74 Ψ; a = 21 ɗ Ψ). Stout tail; seven minutes precloacal supplements pore­shaped. Female with relatively short outstretched ovaries.

Relationships

Sabatieria paraspiculata sp.nov. is similar to S. spiculata sp.nov. by the general body shape, conical tail and spicule shape. It may be distinguished from S.spiculata by the presence of teeth; length of tail 94 µm ɗ 90 µm Ψ; head diameter 15 µm ɗ 20 µm Ψ; c`index 2 ɗ 1,9 Ψ.

S. paraspiculata sp.nov. resembles S.conicauda Vitiello 1970 and S. dorylaimopsoides Allgén 1959 in of the shape of head, conical tail, spicule shape and type of supplements. Can be distinguished from S.conicauda by the length of spicule (spic = 36–37µm) and c´index 2.1–2.5. Differs from S. dorylaimopsoides by the presence of a thorn in the buccal cavity and the with reflexed ovaries in female.