Heterobranch sea slugs (Gastropoda) present reduction, internalization, or absence of shell, and ... more Heterobranch sea slugs (Gastropoda) present reduction, internalization, or absence of shell, and include more than 6,000 described species. Approximately 250 species are recorded from Brazil but only 14 had been previously recorded from Rio Grande do Norte, on the Brazilian northeastern coast. As a result of different expeditions conducted between 2008 and 2020, species were collected and identified. Among them, five species were recorded for the first time from the South Atlantic Ocean: Chelidonura hirundinina (Quoy & Gaimard, 1833); Sclerodoris prea (Ev. Marcus & Er. Marcus, 1967); Thuridilla malaquita Ortea & Buske, 2014; Berthella nebula Ghanimi, Schrödl, Goddard, Ballesteros, Gosliner & Valdés, 2020 and Berthella vialactea Ghanimi, Schrödl, Goddard, Ballesteros, Gosliner & Valdés, 2020. Thirty-six species are recorded for the first time from Rio Grande do Norte. The present survey expands the knowledge of the diversity of sea slugs from Brazil and supports the hypothesis of sim...
FIGURE 3. Phrikoceros mopsus. A – B (MNRJ-PLAT 08). A— in vivo, dorsal view; B— in vivo, dorsal v... more FIGURE 3. Phrikoceros mopsus. A – B (MNRJ-PLAT 08). A— in vivo, dorsal view; B— in vivo, dorsal view of specimen on a dark surface, with the mottled pattern of white spots visible. C – D (MNRJ-PLAT 09). C— sagittal section with indication of reproductive structures; D— ventral structures. cg: cement gland; fa: female antrum; fg: female gonopore; it: main intestine; ma: male atrium; mg: male gonopore; ph: pharynx; pt: pseudotentacles; st: stylet; su: sucker; sv: seminal vesicle; ut: uteri; vs: vas deferens.
FIGURE 1. Studied region with indication of sampled localities: Santa Rita and Búzios (RN: Rio Gr... more FIGURE 1. Studied region with indication of sampled localities: Santa Rita and Búzios (RN: Rio Grande do Norte State) (adapted from Dias Jr. et al. 2007).
In Brazil, 66 flatworm species of the order Polycladida are known, most of which collected from t... more In Brazil, 66 flatworm species of the order Polycladida are known, most of which collected from the southeastern Braziliancoast. The present study includes morphological descriptions of five species from Rio Grande do Norte State, BrazilianNortheastern coast: Enchiridium evelinae, Phrikoceros mopsus, Pseudobiceros evelinae, Thysanozoon brocchii and Hop-loplana divae. These findings represent the first record of Polycladida for this region of Brazil. Also, for the first timeEnchiridium evelinae, Pseudobiceros evelinae and Hoploplana divae are illustrated with color photographs of live spec-imens and histological details. Association with compound ascidians and encrusting bryozoan were observed and com-mented. Our data suggest that knowledge about Brazilian polyclads is underestimated and emphasizes the necessity of further studies to better understand the Polycladida biodiversity in Brazil.
This paper presents the first record of Crosslandia daedali Poorman & Mulliner, 1981 in the South... more This paper presents the first record of Crosslandia daedali Poorman & Mulliner, 1981 in the South Atlantic, Northeast Brazil.
Few specimens of the 15 named species of Cerberilla are known. Body color pattern and teeth morph... more Few specimens of the 15 named species of Cerberilla are known. Body color pattern and teeth morphology have been used as the main diagnostic characters to separate species of the genus. To date, Cerberilla tanna is the only species of the genus described from the western Atlantic. Because its original description does not provide much information about body coloration, the identity of this species remained unclear until now. In this paper, we describe Cerberilla potiguara, a new species from the northeastern coast of Brazil, and compare it with C. tanna. The holotype of C. tanna was located and examined. Cerberilla potiguara new species is longer than C. tanna but has relatively shorter oral tentacles and a narrower foot; the radular teeth of Cerberilla potiguara new species have prominent central and marginal cusps, which are absent in C. tanna. A prominent unarmed penis associated with a conical atrium, observed in Cerberilla potiguara new species and other Cerberilla species, is herein considered a distinguishing characteristic of the genus among the Aeolidiidae.
Few specimens of the 15 named species of Cerberilla are known. Body color pattern and teeth morph... more Few specimens of the 15 named species of Cerberilla are known. Body color pattern and teeth morphology have been used as the main diagnostic characters to separate species of the genus. To date, Cerberilla tanna is the only species of the genus described from the ...
The nudibranch Flabellina dana Millen and Hamann, 2006 is reported from two localities in the nor... more The nudibranch Flabellina dana Millen and Hamann, 2006 is reported from two localities in the northeastern Brazilian coast. These are the first records of this species, previously recorded from localities in the Bahamas and the Caribbean Sea, in South Atlantic Ocean, extending its known geographic distribution more than 3500 km southward.
The nudibranch Flabellina dana Millen and Hamann, 2006 is reported from two localities in the nor... more The nudibranch Flabellina dana Millen and Hamann, 2006 is reported from two localities in the northeastern Brazilian coast. These are the first records of this species, previously recorded from localities in the Bahamas and the Caribbean Sea, in South Atlantic Ocean, extending its known geographic distribution more than 3500 km southward.
This paper presents the first record of Crosslandia daedali Poorman & Mulliner, 1981 in the South... more This paper presents the first record of Crosslandia daedali Poorman & Mulliner, 1981 in the South Atlantic, Northeast Brazil.
Few specimens of the 15 named species of Cerberilla are known. Body color pattern and teeth morph... more Few specimens of the 15 named species of Cerberilla are known. Body color pattern and teeth morphology have been used as the main diagnostic characters to separate species of the genus. To date, Cerberilla tanna is the only species of the genus described from the western Atlantic. Because its original description does not provide much information about body coloration, the identity of this species remained unclear until now. In this paper, we describe Cerberilla potiguara, a new species from the northeastern coast of Brazil, and compare it with C. tanna. The holotype of C. tanna was located and examined. Cerberilla potiguara new species is longer than C. tanna but has relatively shorter oral tentacles and a narrower foot; the radular teeth of Cerberilla potiguara new species have prominent central and marginal cusps, which are absent in C. tanna. A prominent unarmed penis associated with a conical atrium, observed in Cerberilla potiguara new species and other Cerberillaspecies, is herein considered a distinguishing characteristic of the genus among the Aeolidiidae.
Heterobranch sea slugs (Gastropoda) present reduction, internalization, or absence of shell, and ... more Heterobranch sea slugs (Gastropoda) present reduction, internalization, or absence of shell, and include more than 6,000 described species. Approximately 250 species are recorded from Brazil but only 14 had been previously recorded from Rio Grande do Norte, on the Brazilian northeastern coast. As a result of different expeditions conducted between 2008 and 2020, species were collected and identified. Among them, five species were recorded for the first time from the South Atlantic Ocean: Chelidonura hirundinina (Quoy & Gaimard, 1833); Sclerodoris prea (Ev. Marcus & Er. Marcus, 1967); Thuridilla malaquita Ortea & Buske, 2014; Berthella nebula Ghanimi, Schrödl, Goddard, Ballesteros, Gosliner & Valdés, 2020 and Berthella vialactea Ghanimi, Schrödl, Goddard, Ballesteros, Gosliner & Valdés, 2020. Thirty-six species are recorded for the first time from Rio Grande do Norte. The present survey expands the knowledge of the diversity of sea slugs from Brazil and supports the hypothesis of sim...
FIGURE 3. Phrikoceros mopsus. A – B (MNRJ-PLAT 08). A— in vivo, dorsal view; B— in vivo, dorsal v... more FIGURE 3. Phrikoceros mopsus. A – B (MNRJ-PLAT 08). A— in vivo, dorsal view; B— in vivo, dorsal view of specimen on a dark surface, with the mottled pattern of white spots visible. C – D (MNRJ-PLAT 09). C— sagittal section with indication of reproductive structures; D— ventral structures. cg: cement gland; fa: female antrum; fg: female gonopore; it: main intestine; ma: male atrium; mg: male gonopore; ph: pharynx; pt: pseudotentacles; st: stylet; su: sucker; sv: seminal vesicle; ut: uteri; vs: vas deferens.
FIGURE 1. Studied region with indication of sampled localities: Santa Rita and Búzios (RN: Rio Gr... more FIGURE 1. Studied region with indication of sampled localities: Santa Rita and Búzios (RN: Rio Grande do Norte State) (adapted from Dias Jr. et al. 2007).
In Brazil, 66 flatworm species of the order Polycladida are known, most of which collected from t... more In Brazil, 66 flatworm species of the order Polycladida are known, most of which collected from the southeastern Braziliancoast. The present study includes morphological descriptions of five species from Rio Grande do Norte State, BrazilianNortheastern coast: Enchiridium evelinae, Phrikoceros mopsus, Pseudobiceros evelinae, Thysanozoon brocchii and Hop-loplana divae. These findings represent the first record of Polycladida for this region of Brazil. Also, for the first timeEnchiridium evelinae, Pseudobiceros evelinae and Hoploplana divae are illustrated with color photographs of live spec-imens and histological details. Association with compound ascidians and encrusting bryozoan were observed and com-mented. Our data suggest that knowledge about Brazilian polyclads is underestimated and emphasizes the necessity of further studies to better understand the Polycladida biodiversity in Brazil.
This paper presents the first record of Crosslandia daedali Poorman & Mulliner, 1981 in the South... more This paper presents the first record of Crosslandia daedali Poorman & Mulliner, 1981 in the South Atlantic, Northeast Brazil.
Few specimens of the 15 named species of Cerberilla are known. Body color pattern and teeth morph... more Few specimens of the 15 named species of Cerberilla are known. Body color pattern and teeth morphology have been used as the main diagnostic characters to separate species of the genus. To date, Cerberilla tanna is the only species of the genus described from the western Atlantic. Because its original description does not provide much information about body coloration, the identity of this species remained unclear until now. In this paper, we describe Cerberilla potiguara, a new species from the northeastern coast of Brazil, and compare it with C. tanna. The holotype of C. tanna was located and examined. Cerberilla potiguara new species is longer than C. tanna but has relatively shorter oral tentacles and a narrower foot; the radular teeth of Cerberilla potiguara new species have prominent central and marginal cusps, which are absent in C. tanna. A prominent unarmed penis associated with a conical atrium, observed in Cerberilla potiguara new species and other Cerberilla species, is herein considered a distinguishing characteristic of the genus among the Aeolidiidae.
Few specimens of the 15 named species of Cerberilla are known. Body color pattern and teeth morph... more Few specimens of the 15 named species of Cerberilla are known. Body color pattern and teeth morphology have been used as the main diagnostic characters to separate species of the genus. To date, Cerberilla tanna is the only species of the genus described from the ...
The nudibranch Flabellina dana Millen and Hamann, 2006 is reported from two localities in the nor... more The nudibranch Flabellina dana Millen and Hamann, 2006 is reported from two localities in the northeastern Brazilian coast. These are the first records of this species, previously recorded from localities in the Bahamas and the Caribbean Sea, in South Atlantic Ocean, extending its known geographic distribution more than 3500 km southward.
The nudibranch Flabellina dana Millen and Hamann, 2006 is reported from two localities in the nor... more The nudibranch Flabellina dana Millen and Hamann, 2006 is reported from two localities in the northeastern Brazilian coast. These are the first records of this species, previously recorded from localities in the Bahamas and the Caribbean Sea, in South Atlantic Ocean, extending its known geographic distribution more than 3500 km southward.
This paper presents the first record of Crosslandia daedali Poorman & Mulliner, 1981 in the South... more This paper presents the first record of Crosslandia daedali Poorman & Mulliner, 1981 in the South Atlantic, Northeast Brazil.
Few specimens of the 15 named species of Cerberilla are known. Body color pattern and teeth morph... more Few specimens of the 15 named species of Cerberilla are known. Body color pattern and teeth morphology have been used as the main diagnostic characters to separate species of the genus. To date, Cerberilla tanna is the only species of the genus described from the western Atlantic. Because its original description does not provide much information about body coloration, the identity of this species remained unclear until now. In this paper, we describe Cerberilla potiguara, a new species from the northeastern coast of Brazil, and compare it with C. tanna. The holotype of C. tanna was located and examined. Cerberilla potiguara new species is longer than C. tanna but has relatively shorter oral tentacles and a narrower foot; the radular teeth of Cerberilla potiguara new species have prominent central and marginal cusps, which are absent in C. tanna. A prominent unarmed penis associated with a conical atrium, observed in Cerberilla potiguara new species and other Cerberillaspecies, is herein considered a distinguishing characteristic of the genus among the Aeolidiidae.
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Papers by Marlon Delgado
Northeast Brazil.
used as the main diagnostic characters to separate species of
the genus. To date, Cerberilla tanna is the only species of the
genus described from the western Atlantic. Because its original
description does not provide much information about body
coloration, the identity of this species remained unclear until
now. In this paper, we describe Cerberilla potiguara, a new
species from the northeastern coast of Brazil, and compare it
with C. tanna. The holotype of C. tanna was located and examined. Cerberilla potiguara new species is longer than C. tanna but has relatively shorter oral tentacles and a narrower foot; the radular teeth of Cerberilla potiguara new species have prominent central and marginal cusps, which are absent in C. tanna. A prominent unarmed penis associated with a conical atrium, observed in Cerberilla potiguara new species and other Cerberillaspecies, is herein considered a distinguishing characteristic of the genus among the Aeolidiidae.
Northeast Brazil.
used as the main diagnostic characters to separate species of
the genus. To date, Cerberilla tanna is the only species of the
genus described from the western Atlantic. Because its original
description does not provide much information about body
coloration, the identity of this species remained unclear until
now. In this paper, we describe Cerberilla potiguara, a new
species from the northeastern coast of Brazil, and compare it
with C. tanna. The holotype of C. tanna was located and examined. Cerberilla potiguara new species is longer than C. tanna but has relatively shorter oral tentacles and a narrower foot; the radular teeth of Cerberilla potiguara new species have prominent central and marginal cusps, which are absent in C. tanna. A prominent unarmed penis associated with a conical atrium, observed in Cerberilla potiguara new species and other Cerberillaspecies, is herein considered a distinguishing characteristic of the genus among the Aeolidiidae.