Surface ciliation of anuran amphibian larvae: Persistence to late stages in some species but not others

Nokhbatolfoghahai, Mohsen; Downie, J. R.; Ogilvy, Victoria

doi:10.1002/jmor.10469

Cited by 17 publications

(17 citation statements)

References 13 publications

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“…However, the cilia are gradually lost and so is their characteristic morphology (Nishikawa and Sasaki ; Nokhbatolfoghahai et al . ). In Rhinella granulose , the ciliated cells were observed until stage 31.…”

Section: Discussionmentioning

confidence: 97%

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Development of integument and cutaneous glands in larval, juvenile and adult toads (Rhinella granulosa): a morphological and morphometric study

et al. 2014

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Chammas, S.M., Carneiro, S.M., Ferro, R.S., Antoniazzi, M.M. and Jared, C. 2015. Development of integument and cutaneous glands in larval, juvenile and adult toads (Rhinella granulosa): a morphological and morphometric study. -Acta Zoologica (Stockholm) 96: 460-477.In this study, the development of integument and cutaneous glands in the toad Rhinella granulosa (Bufonidae) at different larval stages and in postmetamorphic and adult forms was examined. The analyses were conducted using histological, ultrastructural and morphometric methods. The results showed that cellular aggregations of precursor epidermal glands start to appear in stage 31 of (Herpetologica, 16, 1960 and 183) and then proliferate and invade the dermis. After stage 41, granular and mucous glands are very similar to those found in adults. The granular glands are syncytial and are surrounded by a distinct layer of myoepithelial cells. In the region of parotoid macroglands, the granular glands accumulate and their alveoli progressively increase until they reach adult size. An analysis by scanning electron microscopy showed the inner distribution of the syncytial nuclei and the myoepithelial cells. The morphological changes observed in the integument of tadpoles are associated with the gradual adaptation to terrestrial environments by preparing the individual for future chemical defence against predators and micro-organisms.

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Section: Discussionmentioning

confidence: 97%

“…These cells are also involved in cutaneous respiration by providing more oxygenated water currents (Fox ; Nokhbatolfoghahai et al . ).…”

Section: Discussionmentioning

confidence: 97%

Development of integument and cutaneous glands in larval, juvenile and adult toads (Rhinella granulosa): a morphological and morphometric study

et al. 2014

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“…Both ciliary action and muscular contraction induce intra ovum convective mixing (Warkentin 2007;Goldberg et al 2008). Epidermal cilia serve many roles before and after hatching, including the movement of mucus, microorganisms, and debris, rotations before hatching and gliding movements after hatching, and water-quality assessment, as well as disruption of boundary layers to improve gas exchange (Burggren 1985;Doran et al 2004;Nokhbatolfoghahai et al 2005) (Nokhbatolfoghahai et al 2005(Nokhbatolfoghahai et al , 2006. In fact, the number of surface cilia increases with development until the embryo approaches hatching (Kessel et al 1974).…”

Section: Introductionmentioning

confidence: 99%

Embryonic motility and hatching success of Ambystoma maculatum are influenced by a symbiotic alga

Tattersall¹,

Spiegelaar²

2008

Can. J. Zool.

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To augment O2 supply through the jelly mass and egg capsule, embryonic yellow-spotted salamanders ( Ambystoma maculatum (Shaw, 1802)) take advantage of a unicellular alga, Oophila ambystomatis . Convective currents from surface cilia, however, may also enhance O2 transport, whereas muscular contractions could either enhance delivery or contribute to O2 consumption. Embryonic motion is, therefore, potentially vital to salamander development. We examined embryonic motility across multiple developmental stages, survivorship, and hatching timing in response to different algal levels by rearing salamander egg masses under three different diel light cycles: 24 h dark, 12 h light, and 24 h light per day. Embryos raised in continuous light hatched synchronously and at slightly earlier developmental stages than embryos raised in the dark or in 12 h light per day. We removed eggs at multiple stages to examine embryonic rotation and muscular contraction rates under 180 min periods of both light and dark. Rotational movements occurred more frequently in alga-free than in algae-inhabited eggs, and more frequently in algae-inhabited eggs in the dark than in light. At later developmental stages, muscular contractions were more frequent in embryos from algae-inhabited egg masses in light than those in the dark; thus embryos with less O2 reduced muscular activity, thereby reducing energy consumption when O2 availability was compromised.

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“…The ciliated cells gradually begin to disappear around Stage 14. Nokhbatolfoghahai et al (2006) investigated 20 species of anurans, including a direct-developing frog Pristimantis urichi, and concluded that the cilia are an ancestral larval feature that persists in direct-developing frogs. Richardson et al (1998) reported the presence of ciliated cells in E. coqui from Stage 4 onward, but provided no details.…”

Section: Endolymphatic Calcium Deposits and Ciliated Cells In A Maramentioning

confidence: 99%

“…Hayes et al (2007) identified ciliated cells, goblet cells that produce mucus, and small secretory cells of unknown function in the epidermis of X. laevis. Nokhbatolfoghahai et al (2006) investigated 20 species of anurans, including a direct-developing frog Pristimantis urichi, and concluded that the cilia are an ancestral larval feature that persists in direct-developing frogs. These authors suggested that ciliated cells might function to prevent the retention of microorganisms and cell debris on the epidermis of the embryo; for P. urichi, they described the presence of large numbers of ciliated cells in the pharyngeal region and on the tail fins, which are structures associated with respiration, as is the tail of A. maranguapensis.…”

Section: Endolymphatic Calcium Deposits and Ciliated Cells In A Maramentioning

confidence: 99%

Developmental aspects of the direct‐developing frog Adelophryne maranguapensis

Lima

Reis

Amado

et al. 2016

Genesis

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Direct development in amphibians is characterized by the loss of aquatic breeding. The anuran Adelophryne maranguapensis is one example of a species with direct development, and it is endemic to the state of Ceará, Brazil. Detailed morphological features of A. maranguapensis embryos and the stages of sequential development have not been described before. Here, we analyzed all available genetic sequence tags in A. maranguapensis (tyr exon 1, pomc and rag1) and compared them with sequences from other species of Adelophryne frogs. We describe the A. maranguapensis reproductive tract and embryonic body development, with a focus on the limbs, tail, ciliated cells of the skin, and the egg tooth, which were analyzed using scanning electron microscopy. Histological analyses revealed ovaries containing oocytes surrounded by follicular cells, displaying large nuclei with nucleoli inside. Early in development, the body is unpigmented, and the neural tube forms dorsally to the yolk vesicle, typical of a direct-developing frog embryo. The hindlimbs develop earlier than the forelimbs. Ciliated cells are abundant during the early stages of skin development and are less common during later stages. The egg tooth appears in the later stages and develops as a keratinized microridge structure. The developmental profile of A. maranguapensis presented here will contribute to our understanding of the direct-development model and may help preserve this endangered native Brazilian frog. genesis 54:257-271, 2016. © 2016 Wiley Periodicals, Inc.

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Surface ciliation of anuran amphibian larvae: Persistence to late stages in some species but not others

Cited by 17 publications

References 13 publications

Development of integument and cutaneous glands in larval, juvenile and adult toads (Rhinella granulosa): a morphological and morphometric study

Development of integument and cutaneous glands in larval, juvenile and adult toads (Rhinella granulosa): a morphological and morphometric study

Embryonic motility and hatching success of Ambystoma maculatum are influenced by a symbiotic alga

Developmental aspects of the direct‐developing frog Adelophryne maranguapensis

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