Observations on lesser-known flatworms: temnocephala

Nichols, Kirstin C.

doi:10.1016/0020-7519(75)90114-9

Cited by 14 publications

(8 citation statements)

References 18 publications

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“…T. quadricornis 76 days, and T. pygmaea 59 days. In addition Nichols (1975) found that Temnocephala novaezealandiae was able to survive for at least 3 1 days without the host Paranephrops zealanicus. However, records of temnocephalans living free are few and unsubstantiated.…”

Section: Site Specificitymentioning

confidence: 98%

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The life history and biology of Diceratocephala boschmai (Platyhelminthes; Temnocephalida), an ectosymbiont on the redclaw crayfish Cherax quadricarinatus

Jones

Lester

1992

Hydrobiologia

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Adults of the temnocephalanDiceratocephala boschmai, an ectocommensal on the crayfish Cherax quadricarinatus, deposited eggs on the host carapace. After 15 to 20 days at 28 'C, the eggs hatched into ciliated miniature adults with undeveloped reproductive organs, that remained attached to the host alongside the eggs. They grew and became gravid within 53 to 70 days if they were not dislodged. Most oviposited on the host on which they had hatched. Although larval temnocephalans have been described from in vitro work, this is the first temnocephalan life history to be described in vivo.Juvenile worms frequently changed their position on the carapace. Adult worms were sedentary just prior to, and during oviposition, and were frequently found at the base of the large chelae, the ventral surface of the antennae and antennules, and at the base of the walking legs. The ventral margins of the abdomen, the mouthparts, and the interorbital-rostra1 area were secondarily inhabited. It was calculated using an indirect regression that adult Diceratocephala boschmai survived on average 91 days when removed from the host but they did not produce eggs in vitro. On the host, adult worms lived an average of 48 days after the commencement of oviposition.

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Section: Site Specificitymentioning

confidence: 98%

“…However, records of temnocephalans living free are few and unsubstantiated. Chilton (in Haswell, 1893) reportedly found Temnocephala novaezealandiae attached to boulders in a stream, and Michaelis (in Nichols, 1975), reported finding Temnocephala sp. and its eggs free in springs containing the host Paranephrops planifons.…”

Section: Site Specificitymentioning

confidence: 99%

The life history and biology of Diceratocephala boschmai (Platyhelminthes; Temnocephalida), an ectosymbiont on the redclaw crayfish Cherax quadricarinatus

Jones

Lester

1992

Hydrobiologia

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“…The general ultrastructure of the epidermis, rhabdites and other parts of the integument of T. minor resembles that of most other species of the Temnocephala investigated (Nichols 1975;Rohde 1987;Williams 1975Williams , 1978Williams , 1979, but in contrast to most of these investigations cilia have been found in the trunk region. Epidermal ciliation has been described from a number of other taxa of Temnocephalida, e.g.…”

Section: Integumentmentioning

confidence: 88%

Epidermis and sensory receptors of Temnocephala minor (Plathelminthes, Rhabdocoela, Temnocephalida): an electron microscopic study

Xylander

1997

Zoomorphology

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The epidermis, rhabditic glands and receptors of the commensal flatworm Temnocephala minor are described using electron microscopic techniques. The epidermis is syncytial and non-ciliated at the anterior body end; it bears folds, microvilli and other structures which differ according to the body side. The nuclei are located intraepithelially and distally from the basal membrane. Long cilia occur at the posterior end anteriorly from the sucker. All receptor structures described belong to a single morphological type and stand in groups arising from epidermal pits. On the tentacles these groups are regularly distributed. Each receptor has a single cilium and a long rootlet. More than 15 000 receptors of this type have been estimated to occur on the surface of a single medium-sized specimen of T. minor. Although the total number of receptor structures appears very high, the number of different receptor types is extremely low in comparison to other taxa of flatworms.& b d y :Abbreviations bl basal lamina · bm body musculature · bu bulges of the epidermis · ci cilium/cilia · ep epidermis · gr grana · mo mouth-opening · mu musculature · mv microvilli · re receptor · rh rhabdites · ro ciliary rootlet · sd septate desmosome · su sucker · te tentacle& / f n -b l o c k :

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“…Among the Temnocephalida, epidermal receptors have been studied in Didymorchidae ( Didymorchis ) and Temnocephalidae ( Craspedella , Diceratocephala , Temnosewellia ) from the Australian region (Nichols 1975; Williams 1975; Rohde 1987; Joffe et al . 1995a,b; Rohde and Watson 1995; Damborenea and Cannon 2001).…”

Section: Introductionmentioning

confidence: 99%

First description of collar receptors in Temnocephalidae (Platyhelminthes)

León¹,

Volonterio²

2003

Acta Zoologica

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Two species of Temnocephala (Platyhelminthes, Temnocephalida, Temnocephalidae), namely Temnocephala iheringi and Temnocephala haswelli, have collar receptors in the epidermis of the tentacles and general body surface, but not in the sucker region. These receptors were seen associated with clusters of 20–22 monociliary receptors. All collar receptors found in these temnocephalids bore six stereocilia. Other neoophoran platyhelminths have a constant number of eight stereocilia per collar receptor, the only exception being members of another family of Temnocephalida, the Didymorchidae, where collar receptor cells with five and six stereocilia have been recorded. Therefore, the presence of a lower number of stereocilia per collar receptor is likely to be an apomorphic trait of the Temnocephalida.

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Observations on lesser-known flatworms: temnocephala

Cited by 14 publications

References 18 publications

The life history and biology of Diceratocephala boschmai (Platyhelminthes; Temnocephalida), an ectosymbiont on the redclaw crayfish Cherax quadricarinatus

The life history and biology of Diceratocephala boschmai (Platyhelminthes; Temnocephalida), an ectosymbiont on the redclaw crayfish Cherax quadricarinatus

Epidermis and sensory receptors of Temnocephala minor (Plathelminthes, Rhabdocoela, Temnocephalida): an electron microscopic study

First description of collar receptors in Temnocephalidae (Platyhelminthes)

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