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Two new species of Sabatieria Rouville (Nematoda: Comesomatidae) with conical-cylindrical tails, from Campos Basin, Rio de Janeiro, Brazil *
No full textBotelho, Alessandra Prates, Silva, Maria Cristina Da, Sobral, Luciana Davina Tosta, Fonsêca-Genevois, Verônica Gomes (2009): Two new species of Sabatieria Rouville (Nematoda: Comesomatidae) with conical-cylindrical tails, from Campos Basin, Rio de Janeiro, Brazil *. Zootaxa 2096: 82-98, DOI: 10.5281/zenodo.18771
FIGURE 2 in Four new species of Sabatieria Rouville, 1903 (Nematoda, Comesomatidae) from the Continental Slope of Atlantic Southeast
No full textFIGURE 2. Sabatieria spiculata sp.nov. A. Total view of male; B. Pharyngeal region of male, C. Vulva region; D. Copulatory apparatus and tail region in oblique view; E. Posterior body region showing the arrangement of precloacal supplements; F. Female reproductive system.Published as part of 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, pp. 39-57 in Zootaxa 1402 on page 44, DOI: 10.5281/zenodo.17544
Sabatieria paraspiculata Botelho, Silva, Esteves & Fonsêca-Genevois, 2007, sp.nov.
No full textSabatieria 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 2 F). 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 = 36–37 µm) 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.Published as part of 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, pp. 39-57 in Zootaxa 1402 on pages 46-49, DOI: 10.5281/zenodo.17544
Sabatieria spiculata Botelho, Silva, Esteves & Fonsêca-Genevois, 2007, sp.nov.
No full textSabatieria spiculata sp.nov. (figure 2 and 3) Description Studied material: 6 male; 4 female Type material: Male hollotype MNRJ 305; female allotype MNRJ 306; 5 males 46–50 NM LMZOO UFPE; Three females 51–53 NM LMZOOUFPE. Type locality: Campos Basin (Rio de Janeiro, Pernambuco, Brazil). It was found at 750 and 1650 meters depth, in siltclay sediments. Measurements: see table 2. Etymology: The specific name spiculata refers to the long and sligth spicule. Male: Cylindrical body, mediumsized, tail short with cylindroconical shape. Punctated cuticle with transversal rows of dots and lateral differentiation with larger and wider spaced punctations, specially in the tail region. Rounded and attenuated head with anterior sensilla arranged in three crowns: six minute internal labial sensilla, six external labial setae and four cephalic setae. Somatic setae, short.. Amphidial fovea spiral, with three turns. Buccal cavity cupshaped, with diminute dorsal teeth. Pharynx clavate, gradually expanding towards to the posterior end, but without distinct bulb. Cardia short, pear shaped. Nerve ring slender located at the middle of pharynx and anterior to secretoryexcretory pore. Ventral gland opposite posterior end of pharynx and beginning of intestine; system diorchic; opposed and outstretched testes. Anterior testis situated on the left of the intestine and the posterior one on the right side. Spicule paired with the same length equally wide and slightly curved ventrally; proximal half with midseptum (each spicule has inside the core sensilla). Several glandular cells are arranged around the spicules. Small gubernaculum with narrow apophysis. Minute porelike precolacal supplements and precloacal setae. Spermatozoa oval, elongated, showing some striation. Conical tail with three caudal glands, ending in a spinneret. Two caudal setae. TABLE 2. Measurements (µm) of Sabatieria spiculata sp.nov. Female: Females are quite similar to males, although some minor morphological differences are observed. Total body length and head diameter similar to males. Amphidial fovea spiral with three turns. Buccal cavity cupshaped with minute dorsal tooth. Pharynx clavate. Nerve ring situated at the middle of pharynx. Secretoryexcretory pore somewhat more posterior than in male. Reproductive system didelphicamphidelphic, with outstretched ovaries. Egg proximal to vagina in the anterior part of uterus. Vulva at midbody. Vagina thinwalled; pars proximalis vaginae (= vagina uterina) surrounded by a constrictor muscle. Dilators vaginae extending from the uterus wall opposite the vagina towards the subdorsal body wall. Finely granular vaginal glands present at the pars distalis vaginae (figure 2 C). Tail conical with three caudal glands ending in a spinneret. Posterior end of tail with two short somatic setae. Diagnosis S. spiculata sp.nov. is characterised by a minute dorsal tooth; 10–14 porelike precloacal supplements; narrow spicules with 53–62 µm; tail conical (70–94 µm). Relationships S. spiculata sp.nov. resembles S.conicauda Vitiello 1970 and S. dorylaimopsoides Allgén 1959 in the shape of head, tail, spicule and supplements. Can be distinguished from S.conicauda by the total lenght (L= 1051–1153 ɗ and 1153 Ψ), number of supplements (7–8) and non armed buccal cavity. Difers from S.dorylaimopsoides by the thorn in buccal cavity and the reproductive system in female with reflexed ovaries.Published as part of 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, pp. 39-57 in Zootaxa 1402 on pages 42-45, DOI: 10.5281/zenodo.17544
Sabatieria subrotundicauda Botelho, Silva, Esteves & Fonsêca-Genevois, 2007, sp. nov.
No full textSabatieria subrotundicauda sp. nov. (Figure 8 and 9) Description Studied material: 3 males; 6 females. Type material: Male holotype MNRJ 311; Female allotype MNRJ 312; Two male paratypes 63–64 NM LMZOOUFPE; Five female paratypes 65–69 NM LMZOOUFPE. Type locality: Campos Basin (Rio de Janeiro, Pernambuco, Brazil): deepsea found in 750 m depth, siltclay sediments. Measurements: see table 5. TABLE 5. Measurements (μm) of Sabatieria subrotundicauda sp. nov. Etymology: The specific name subrotundicauda refers to the tail shape which is almost rounded. Male: Body cylindrical. Punctated cuticle with transversal dotted lines, more evident in tail region. Lateral differentiation present, being punctations larger and more widely spaced. Somatic setae very short. Head rounded and attenuated. Six inner labial setae, six outer labial setae short and four cephalic setae very short. Amphidial fovea spiral with two and a half turns. Buccal cavity cupshaped. Pharynx clavate, gradually expanding towards the posterior end, but without distinct bulb. Cardia short and small. Nerve ring slender located at the middle of pharynx and anterior to secretoryexcretory pore. Ventral gland is located between the end of pharynx and the beginning of intestine. The reproductive system possesses two opposed and outstretched testes anterior one on the left and posterior one on the right side of the intestine. Four pairs of ejaculatory glands are present. Spicules paired, ventrally curved and with a projection like an arrow in the distal part; proximal end with a septum. There are several glandular cells located around the spicules. Gubernaculum small with a narrow apophisis. Seven poreshaped precloacal supplements are present. Tail short and rounded. It presents a slightly narrow region at 2 / 3 of the tail. Three caudal glands are present ending in a spinneret. Two caudal setae very short. Female: Females are similar to males. Internal labial and external labial papilliform. Cephalic setae short. Amphidial fovea spiral with two turns and a half. Somatic setae very short. Buccal cavity cupshaped. Pharynx clavate, gradually expanding towards the posterior end, but without distinct bulb. Cardia short, small and pearshaped. Nerve ring slender located at the middle of pharynx and anterior to secretoryexcretory pore. Ventral gland situated between the end of pharynx and the beginning of intestine. The reproductive system composed by two opposed and reflexed ovaries. Vulva present at midbody. Tail short and rounded. Three caudal glands.Two caudal setae very short. Relationships Sabatieria subrotundicauda resembles Sabatieria conicauda, possessing the same body shape and conical tail. The measurements in Sabatieria subrotundicauda are higher than in S. conicauda e.g. length, cephalic setae length and spicule (L = 948–1051 µm ɗ; 1153 µm Ψ; Cs = 2.3–2.6 µm; spic= 36–37 µm ). Females of S. conicauda have ovaries outstretched. Among Sabatieria species with rounded tail or similar to S. conicauda, the presence of reflexed ovaries was observed only in the S. dorylaimopsoides but the last species differs in the presence of a thorn not discernible in Sabatieria subrotundicauda. S. lepida Vitiello, 1976 has a triangular ventral projection in the distal part of spicules and S. subrotundicauda has a hooklike projection. Tail is conical in S. subrotundicauda and conicocylindrical in S.lepida. S. subrotundicauda resembles to S. rotundicauda Allgén 1959 in the rounded tail. The difference is in the length (L= 3115 µm) and the female have extended gonads.Published as part of 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, pp. 39-57 in Zootaxa 1402 on pages 53-56, DOI: 10.5281/zenodo.17544
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Sabatieria fidelis Botelho, Silva, Sobral & Fonsêca-Genevois, 2009, sp. n.
No full textSabatieria fidelis sp. n. (Figures 5, 6, 7, 8; Table 1) Material Studied: 2 males, 2 females. Type material: Male holotype, slide MNRJ 320. Female paratype, slide MNRJ 321; 1 male, slide 96 NM LMZOO-UFPE, 1 female, slide 97 NM LMZOO-UFPE. Type locality: Male holotype, station no. 54, 750 m depth, collected in May 2002. Other localities: Female paratype, station no. 41, 1222 m depth, collected in May 2002; male paratype, station no. 35, 916 m depth, collected in May 2002; female paratype, station no. 74, 750 m depth, collected in November 2002 (cf. Appendix 1). Etymology. The species name is the Latin fidelis = faithful, because the specimens have all the characteristics that are common to Sabatieria species, and the new features are not easy to see. Description. holotype: Cylindrical body, medium-sized, attenuated at both ends. Cuticle with transverse rows of dots, and lateral differentiation with larger and more widely spaced dots, irregularly arranged. Head slightly set off by constriction in the cephalic setae region, and with anterior sensilla arranged in three crowns: six minute internal labial papillae, six external labial papillae and four cephalic setae. Buccal cavity cupshaped. Amphidial fovea spiral, with 2 1 / 4 turns. Pharynx slightly clavate, gradually expanding towards the posterior end, but without distinct bulb. Cardia short and round. Nerve ring slender, located very close to middle of pharynx and anterior to secretory-excretory pore. Cellular body of ventral gland at level of posterior end of pharynx and beginning of intestine, with secretory pore in middle of pharynx. Male reproductive system diorchic, with opposed and outstretched testes. Anterior testis situated on the left and posterior testis on the right side of the intestine. Slender short paired spicules, similar in length and width and slightly curved ventrally; proximal half of septum and distal part with ventrally directed dropper-shaped tip. Several glandular cells are arranged around the spicules. Gubernaculum small, cuticularized, v-shaped in distal part, measuring 16 µm, and with narrow cuticularized apophysis of length 22 µm. Minute pore-like pre-cloacal supplements present, easily overlooked; but unfortunately the specimens are more ventrally positioned without a clear view of the number of them. Three pairs of ejaculatory glands anterior to the cloaca. Spermatozoa oval, 21 µm long. Conico-cylindrical tail with three caudal glands, ending in a spinneret. Three setae on the tail tip, measuring 3 µm. Female Paratype: The females are similar to males except for the longer total length, shorter tail and spiral amphidial fovea with 2 ¼– 3 turns. Reproductive system didelphic-amphidelphic; with outstretched ovaries. Anterior ovary to the left and posterior ovary to the right of the intestine, and distal part of the uterus with oocyte. Vulva at mid-body, vagina thin-walled; pars proximalis vaginae (= vagina uterina) surrounded by a well-developed constricting muscle. Granular vaginal glands present at the pars distalis vaginae. Oocytes 44–53 µm long. Diagnosis. Sabatieria fidelis sp. n. can be differentiated by its short outstretched testes, the spicules with dropper-shaped tips and directed ventrally, the gubernaculum with a cuticularized v-shape on the distal part, and the short cephalic and somatic setae. Discussion. In relation to Sabatieria pulchra, the similar characteristics are the number of amphidial fovea turns in females, total length, maximum diameter and spicule length. Sabatieria fidelis sp. n. differs in relation to the number of turns of the amphidial fovea in males (Sabatieria pulchra with 2 ¾– 3), absence of three glands in the pharyngeal region, and the proximal parts of the spicules in S. pulchra are more inflated than in Sabatieria fidelis sp. n. Another characteristic is the sexual dimorphism in Sabatieria fidelis sp. n.: females have a shorter tail and more turns in the amphidial fovea. Sabatieria fidelis sp. n. is similar to Sabatieria falcifera with respect to the short cervical setae, number of turns of the amphidial fovea in the female (2.5 in S. fidelis sp. n. and in S. falcifera) and spicule length (62 µm in S. fidelis sp. n. versus 66.5 µm in S. falcifera). It can be distinguished by the cephalic setae length (3–3.7 in S. fidelis sp. n. versus 7 µm in S. falcifera), length of the gubernaculum apophysis (22 µm in S. fidelis sp. n. versus 29 µm S. falcifera), number of turns of amphidial fovea in the male (2.5 in S. fidelis sp. n. versus 2.7–3 in S. falcifera). Sabatieria fidelis sp. n. also resembles Sabatieria praedatrix in maximum diameter (64.5 in S. fidelis sp. n. versus 67 µm in S. praedatrix) and the length of somatic setae. It can be differentiated by the de Man indexes a and c (a = 26.3–34.8; c = 13.8–20.9 in S. fidelis versus a = 50–55; c = 13.5–14 in S. praedatrix). In relation to Sabatieria vasicola, this new species has the same values of de Man indexes a, b and c (a = 26.3–34.8; b = 7.4–10.9; c = 13.8–20.9 in S. fidelis versus a = 26.6–32.2; b = 7.5–9.3; c = 9.1–14.7 in S. vasicola), but can be distinguished by the length of the cephalic setae (3–3.7 µm in S. fidelis sp. n. versus 6–8 µm in S. vasicola), spicule length (62–68 µm in S. fidelis sp. n. versus 72–82 µm in S. vasicola), apophysis length (22 µm in S. fidelis sp. n. versus 33–34 µm in S. vasicola) and tail length (90–150 µm in S. fidelis sp. n. versus 173–220 µm in S. vasicola).Published as part of Botelho, Alessandra Prates, Silva, Maria Cristina Da, Sobral, Luciana Davina Tosta & Fonsêca-Genevois, Verônica Gomes, 2009, Two new species of Sabatieria Rouville (Nematoda: Comesomatidae) with conical-cylindrical tails, from Campos Basin, Rio de Janeiro, Brazil *, pp. 82-98 in Zootaxa 2096 on pages 91-96, DOI: 10.5281/zenodo.18771
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