Molecular Genetic Re-Examination of Subfamilies and Polyphyly in the Family Pinnotheridae (Crustacea

Theil, Emma Palacios; CUESTA, JOS√à; CAMPOS, ERNESTO; Felder, Darryl L.

doi:10.1201/9781420092592-c23

Cited by 37 publications

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“…Other researches clarify the evolution, biogeography and morphological/molecular systematic of the Austinixa genus (HARRISON, 2004;HARRISON & HANLEY, 2005;PALACIOS-THEIL et al, 2009); and one reports on the biology of A. gorei (Manning & Felder, 1989) (MCDERMOTT, 2006). Austinixa aidae is poorly known outside its taxonomy (MANNING & FELDER, 1989;COELHO, 1997;HEARD & MANNING, 1997;HARRISON, 2004;HARRISON & HANLEY, 2005;PALACIOS-THEIL et al, 2009) Based on this promising scenario for investigation, this study describes the population dynamics of the symbiotic crab A. aidae in southeastern Brazil. The specific goals were to know more about size frequency distribution, sex ratio, density and mean incidence (percentage of occupation) in its hosts' galleries.…”

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Population dynamics of the pea crab Austinixa aidae (Brachyura, Pinnotheridae): a symbiotic of the ghost shrimp Callichirus major (Thalassinidea, Callianassidae) from the southwestern Atlantic

Peirò

Mantelatto

2011

Iheringia, Sér. Zool.

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The Pinnotheridae family is one of the most diverse and complex groups of brachyuran crabs, many of them symbionts of a wide variety of invertebrates. The present study describes the population dynamics of the pea crab Austinixa aidae (Righi, 1967), a symbiont associated with the burrows of the ghost shrimp Callichirus major (Say, 1818). Individuals (n = 588) were collected bimonthly from May, 2005 to September, 2006 along a sandy beach in the southwestern Atlantic, state of São Paulo, Brazil. Our data indicated that the population demography of A. aidae was characterized by a bimodal size-frequency distribution (between 2.0 and 4.0 mm and between 8.0 and 9.0 mm CW) that remained similar throughout the study period. Sex ratio does not differ significantly from 1:1 (p > 0.05), which confirms the pattern observed in other symbiontic pinnotherids. Density values (1.72 ± 1.34 ind. • ap.-1) are in agreement with those found for other species of the genus. The mean symbiosis incidence (75.6%) was one of the highest among species of the Pinnotheridae family, but it was the lowest among the three studied species of the genus. Recruitment pattern was annual, beginning in May and peaking in July, in both years, after the peak of ovigerous females in the population (from March to May). Our findings describe ecological and biological aspects of A. aidae similar to those of other species of this genus, even from different geographic localities.

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confidence: 99%

Population dynamics of the pea crab Austinixa aidae (Brachyura, Pinnotheridae): a symbiotic of the ghost shrimp Callichirus major (Thalassinidea, Callianassidae) from the southwestern Atlantic

Peirò

Mantelatto

2011

Iheringia, Sér. Zool.

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“…The systematic position of the genera Calyptraeotheres and Tumidotheres has been focus of discussion (Campos 1999;Marques and Pohle 1995;Palacios-Theil et al 2009). Due to this, an exhaustive comparison among C. garthi and reported characters of C. politus (Saelzer and Hapette 1986) and T. maculatus (Costlow and Bookhout 1966) was carried out here ( Table 2).…”

Section: Discussionmentioning

confidence: 99%

“…The species Pinnaxodes major, which is positioned close to Holothuriophilus within another clade (IIB) sensu Palacios-Theil et al (2009), was also included in such comparison because this species share important features with T. maculatus.…”

Section: Discussionmentioning

confidence: 99%

“…Then, throughout morphology of adult crabs, Campos (1999) transferred the pinnotherid species, which lives as obligatory symbiont of slipper limpet (family Calyptraeidae), to the genus Calyptraeotheres. Finally, the phylogeny made on the basis of mitochondrial genes shows a closer relationship between the genera Tumidotheres and Calyptraeotheres (Palacios-Theil et al 2009). …”

Section: Introductionmentioning

confidence: 99%

“…Phylogeny and classification of the pinnotherids have been the aim of many revisions based on adults and larvae morphology and DNA sequences (Ahyong and Ng 2007;Campos 1996aCampos , b, 2009Griffith 1987;Marques and Pohle 1995;Palacios-Theil et al 2009;Pohle and Marques 1998). Particularly, the genera Calyptraeotheres and Tumidotheres have been the focus of debate.…”

Section: Introductionmentioning

confidence: 99%

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Larval development of Calyptraeotheres garthi (Fenucci, 1975) (Brachyura, Pinnotheridae) described from laboratory-reared material, with notes of larval character use on Pinnotheridae systematic

et al. 2010

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Calyptraeotheres garthi (Brachyura, Pinnotheridae) is a pinnotherid crab that lives in association with some species of Crepidula sp. (Calyptraeidae). The larvae of C. garthi were cultured under laboratory conditions (20°C and 35 PSU). Larval development from hatchling to megalopa took 30 days. Five zoeal stages and the megalopa are described and fully illustrated. The genus Calyptraeotheres consists only of four species. Larval characters were compared with the previous description of larvae from the southeastern Pacific species C. politus and with Tumidotheres maculatus a closely related pinnotherid crab. In addition, in light of recent molecular phylogeny of the family Pinnotheridae, we present a discussion about the Calyptraeotheres and its close related genera.

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Morphology of the first zoeal stage of the commensal southwestern Atlantic crab Austinixa aidae (Righi 1967) (Brachyura: Pinnotheridae), hatched in the laboratory

Mantelatto

Cuesta

2010

Helgol Mar Res

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The first zoeal stage of the endemic southern Atlantic pinnotherid crab Austinixa aidae is described and illustrated based on laboratory-hatched material from ovigerous females collected from the upper burrows of the thalassinidean shrimp Callichirus major at Ubatuba, São Paulo, Brazil. The zoeae of Austinixa species can be distinguished from other pinnotherids and especially from zoeae of the closely related species of Pinnixa by the telson structure.

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Molecular Genetic Re-Examination of Subfamilies and Polyphyly in the Family Pinnotheridae (Crustacea

Cited by 37 publications

References 0 publications

Population dynamics of the pea crab Austinixa aidae (Brachyura, Pinnotheridae): a symbiotic of the ghost shrimp Callichirus major (Thalassinidea, Callianassidae) from the southwestern Atlantic

Population dynamics of the pea crab Austinixa aidae (Brachyura, Pinnotheridae): a symbiotic of the ghost shrimp Callichirus major (Thalassinidea, Callianassidae) from the southwestern Atlantic

Larval development of Calyptraeotheres garthi (Fenucci, 1975) (Brachyura, Pinnotheridae) described from laboratory-reared material, with notes of larval character use on Pinnotheridae systematic

Morphology of the first zoeal stage of the commensal southwestern Atlantic crab Austinixa aidae (Righi 1967) (Brachyura: Pinnotheridae), hatched in the laboratory

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