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Revalidation of the spider genus Citharoceps Chamberlin, 1924 (Araneae, Segestriidae).

Giroti AM, Brescovit AD - Zookeys (2015)

Bottom Line: In the present study, Citharoceps is revalidated and redescribed based on the occurrence of the stridulatory apparatus in Citharocepsfidicina and Segestriacruzana Chamberlin & Ivie, and also on the presence of distinguishable characters, such as the length of the labium-sternum junction, ventral median spine on male metatarsi I, and strong sclerotized interpulmonary fold in females, forming a conspicuous median flap.Segestriacruzana is transfered to Citharoceps, with Citharocepscalifornica removed from the synonym of Citharocepsfidicina, and proposed as a junior synonym of Citharocepscruzana, due to the similarity between the additional material examined and the original description.Males of Citharocepsfidicina and Citharocepscruzana are described for the first time.

View Article: PubMed Central - HTML - PubMed

Affiliation: Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, travessa 14, 321, 05508-090, São Paulo, São Paulo, Brazil ; Laboratório Especial de Coleções Zoológicas, Instituto Butantan, Avenida Vital Brazil, 1500, 05503-090, São Paulo, São Paulo, Brazil.

ABSTRACT
Citharoceps Chamberlin was diagnosed by the presence of a very distinctive stridulatory apparatus composed of two patches of ridges on the sides of the cephalic region, and a stridulatory thorn on the prolateral region of the femur I. Currently, this genus is a junior synonym of Ariadna Audouin, with the assumption that the stridulatory apparatus could constitute an exclusive feature of its unique known species, Citharocepsfidicina Chamberlin, currently senior synonym of Citharocepscalifornica Chamberlin & Ivie. In the present study, Citharoceps is revalidated and redescribed based on the occurrence of the stridulatory apparatus in Citharocepsfidicina and Segestriacruzana Chamberlin & Ivie, and also on the presence of distinguishable characters, such as the length of the labium-sternum junction, ventral median spine on male metatarsi I, and strong sclerotized interpulmonary fold in females, forming a conspicuous median flap. Segestriacruzana is transfered to Citharoceps, with Citharocepscalifornica removed from the synonym of Citharocepsfidicina, and proposed as a junior synonym of Citharocepscruzana, due to the similarity between the additional material examined and the original description. Males of Citharocepsfidicina and Citharocepscruzana are described for the first time.

No MeSH data available.


Citharocepscruzana. Male from Santa Cruz Island, California (CAS 9046542) (A–E) female from Coast Ridge Trail, California (CDU) (F–I). A, F habitus, dorsal view B, G habitus, ventral view C right leg I, prolateral view D same, retrolateral view E right metatarsus and tarsus I, ventral view, black arrow indicates the ventral median spine H left leg I, prolateral view I same, retrolateral view; white arrows indicate the stridulatory thorn. Scale bars: 1 mm.
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Figure 7: Citharocepscruzana. Male from Santa Cruz Island, California (CAS 9046542) (A–E) female from Coast Ridge Trail, California (CDU) (F–I). A, F habitus, dorsal view B, G habitus, ventral view C right leg I, prolateral view D same, retrolateral view E right metatarsus and tarsus I, ventral view, black arrow indicates the ventral median spine H left leg I, prolateral view I same, retrolateral view; white arrows indicate the stridulatory thorn. Scale bars: 1 mm.

Mentions: The genus Citharoceps is distinguished from other segestriid genera by the presence in males, females and immatures of a conspicuous stridulatory apparatus composed of two patches of grooves on both sides of cephalic region (Figs 1A–C) and a stridulatory thorn located on the prolateral region of femur I (Figs 2A–B; 5C, H; 7C, H). Citharoceps has a labium with the distal region narrowed (Fig. 1F; 9C), differing from Segestria (Fig. 9D; Giroti and Brescovit 2011: fig. 8) and Gippsicola (Fig. 9B), which have a nearly parallel-sided labium. It is distinguished from Ariadna (Fig. 9A) by the presence of a labium-sternum junction with equal or smaller length than the endite-sternum junction (Fig. 9C); by a ventral spine on the median region of male metatarsi I (Figs 5E; 7E), and by the females with an interpulmonary fold strongly sclerotized, forming a conspicuous median flap (Figs 4D–E; 6C; 8D), which is absent in Ariadna (Fig. 10A).


Revalidation of the spider genus Citharoceps Chamberlin, 1924 (Araneae, Segestriidae).

Giroti AM, Brescovit AD - Zookeys (2015)

Citharocepscruzana. Male from Santa Cruz Island, California (CAS 9046542) (A–E) female from Coast Ridge Trail, California (CDU) (F–I). A, F habitus, dorsal view B, G habitus, ventral view C right leg I, prolateral view D same, retrolateral view E right metatarsus and tarsus I, ventral view, black arrow indicates the ventral median spine H left leg I, prolateral view I same, retrolateral view; white arrows indicate the stridulatory thorn. Scale bars: 1 mm.
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

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Show All Figures
getmorefigures.php?uid=PMC4400402&req=5

Figure 7: Citharocepscruzana. Male from Santa Cruz Island, California (CAS 9046542) (A–E) female from Coast Ridge Trail, California (CDU) (F–I). A, F habitus, dorsal view B, G habitus, ventral view C right leg I, prolateral view D same, retrolateral view E right metatarsus and tarsus I, ventral view, black arrow indicates the ventral median spine H left leg I, prolateral view I same, retrolateral view; white arrows indicate the stridulatory thorn. Scale bars: 1 mm.
Mentions: The genus Citharoceps is distinguished from other segestriid genera by the presence in males, females and immatures of a conspicuous stridulatory apparatus composed of two patches of grooves on both sides of cephalic region (Figs 1A–C) and a stridulatory thorn located on the prolateral region of femur I (Figs 2A–B; 5C, H; 7C, H). Citharoceps has a labium with the distal region narrowed (Fig. 1F; 9C), differing from Segestria (Fig. 9D; Giroti and Brescovit 2011: fig. 8) and Gippsicola (Fig. 9B), which have a nearly parallel-sided labium. It is distinguished from Ariadna (Fig. 9A) by the presence of a labium-sternum junction with equal or smaller length than the endite-sternum junction (Fig. 9C); by a ventral spine on the median region of male metatarsi I (Figs 5E; 7E), and by the females with an interpulmonary fold strongly sclerotized, forming a conspicuous median flap (Figs 4D–E; 6C; 8D), which is absent in Ariadna (Fig. 10A).

Bottom Line: In the present study, Citharoceps is revalidated and redescribed based on the occurrence of the stridulatory apparatus in Citharocepsfidicina and Segestriacruzana Chamberlin & Ivie, and also on the presence of distinguishable characters, such as the length of the labium-sternum junction, ventral median spine on male metatarsi I, and strong sclerotized interpulmonary fold in females, forming a conspicuous median flap.Segestriacruzana is transfered to Citharoceps, with Citharocepscalifornica removed from the synonym of Citharocepsfidicina, and proposed as a junior synonym of Citharocepscruzana, due to the similarity between the additional material examined and the original description.Males of Citharocepsfidicina and Citharocepscruzana are described for the first time.

View Article: PubMed Central - HTML - PubMed

Affiliation: Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, travessa 14, 321, 05508-090, São Paulo, São Paulo, Brazil ; Laboratório Especial de Coleções Zoológicas, Instituto Butantan, Avenida Vital Brazil, 1500, 05503-090, São Paulo, São Paulo, Brazil.

ABSTRACT
Citharoceps Chamberlin was diagnosed by the presence of a very distinctive stridulatory apparatus composed of two patches of ridges on the sides of the cephalic region, and a stridulatory thorn on the prolateral region of the femur I. Currently, this genus is a junior synonym of Ariadna Audouin, with the assumption that the stridulatory apparatus could constitute an exclusive feature of its unique known species, Citharocepsfidicina Chamberlin, currently senior synonym of Citharocepscalifornica Chamberlin & Ivie. In the present study, Citharoceps is revalidated and redescribed based on the occurrence of the stridulatory apparatus in Citharocepsfidicina and Segestriacruzana Chamberlin & Ivie, and also on the presence of distinguishable characters, such as the length of the labium-sternum junction, ventral median spine on male metatarsi I, and strong sclerotized interpulmonary fold in females, forming a conspicuous median flap. Segestriacruzana is transfered to Citharoceps, with Citharocepscalifornica removed from the synonym of Citharocepsfidicina, and proposed as a junior synonym of Citharocepscruzana, due to the similarity between the additional material examined and the original description. Males of Citharocepsfidicina and Citharocepscruzana are described for the first time.

No MeSH data available.