Comparative Ultrastructure of Hermit Crab Spermatozoa (Decapoda: Anomura: Paguroidea)

Tudge, C. C.

doi:10.2307/1549034

Cited by 36 publications

(57 citation statements)

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“…1980(Hinsch. , 1991Tudge, 1992Tudge, , 1995a (Tudge, 1995a The spermatozoal data supports the views presented by Pilgrim (1965) and McLaughlin…”

Section: Discussionsupporting

confidence: 74%

“…( 1 983a) that Lomis is basal to, or a separate lineage from, the ancestor of the Anomura + Thalassinidea (Pilgrim, 1965) Lomis and more similar to investigated paguroids (Tudge, 1992(Tudge, , 1995a …”

Section: Discussionmentioning

confidence: 99%

“…Pilgrim (1965) Lomis continues to be problematic in regard to its relationship to the remainder ofthe Anomura (McLaughlin, 1983b;Martin and Abele, 1986;Richterand Scholtz, 1994 (Tudge, 1992(Tudge, , 1995aJamieson, 1994Jamieson, , 1995 and references therein). In this paper, the ultrastructure of the spermatozoa of Lomis hirta is described for the first time and the phylogenetic implications are discussed.…”

mentioning

confidence: 99%

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Spermatological evidence supports the taxonomic placement of the Australian endemic hairy stone crab Lomis hirta (Decapoda: Anomura: Lomidae)

Tudge¹

1997

Mem. Natl. Mus. Vic.

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“…1980(Hinsch. , 1991Tudge, 1992Tudge, , 1995a (Tudge, 1995a The spermatozoal data supports the views presented by Pilgrim (1965) and McLaughlin…”

Section: Discussionsupporting

confidence: 74%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Spermatological evidence supports the taxonomic placement of the Australian endemic hairy stone crab Lomis hirta (Decapoda: Anomura: Lomidae)

Tudge¹

1997

Mem. Natl. Mus. Vic.

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“…A region in Stimdromia identified as the acrosome ray zone is presumably but not certainly homologous with the zone of that name in Dromidiopsis. The inner or proximal electron-dense layer in D. antillensis is composed of material very similar to that of the true acrosomal ray zone of the sperm of heterotremes, astacids and hermit crabs (Brown 1966;Jamieson 1990;Tudge 1992), though homology remains tentative.…”

Section: Discussionmentioning

confidence: 99%

The Ultrastructure of the Spermatozoon of Dromidiopsis-Edwardsi Rathbun, 1919 (Crustacea, Brachyura, Dromiidae) - Confirmation of a Dromiid Sperm Type

Jamieson¹,

Tudge²,

Scheltinga³

1993

Aust. J. Zool.

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The dromiid spermatozoon, as exemplified by Dromidiopsis edwardsi, Stimdromia (=Petalomera) lateralis and Dromidia antillensis, accords with that of the Homolidae and differs markedly from spermatozoa of other crabs (the raninid-heterotreme-thoracotreme assemblage) in the discoidal form of the acrosome and the capitate form of the perforatorium. Dromiids differ from homolids in the greater depression of the acrosome and the form of the head of the perforatorium, thus exhibiting a distinctive dromiid sperm type. The head is bilaterally prolonged in D. edwardsi and also shows bilateral symmetry, though this is less pronounced in S. lateralis. In homolids the head of the perforatorium has the form of a horizontally disposed spiked wheel. Centrioles are unknown in dromiid sperm but are present in homolids. Nuclear arms in D. edwardsi, as in homolids, have the form of three small radial vertices. Dromiids, homolids, raninids, higher heterotremes and thoracotremes differ (homoplasically?) from lower heterotremes in lacking microtubules in the nuclear arms. Dromiid sperm lack the posterior median process of the nucleus seen in homolids, anomurans and lower heterotremes. The sperm of D. edwardsi differs from other investigated dromiid sperm in the asymmetrical location of the opercular perforation relative to the longitudinal axis of the sperm, and in more complex zonation of the acrosome vesicle. The acrosome is deeply embedded in the nucleus in D. edwardsi whereas in S. lateralis it is superficial on the nucleus. Both have an apical protuberance of subopercular material through the opercular perforation, known elsewhere only in dynomenid crabs. Sperm structure in the Dromiidae thus differs significantly from that in the Eubrachyura.

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“…The inner dense zone in Paradynomene appears homologous with the large lower zone in Petalomera but possibly with only part of the inner zone of Dromidiopsis. The inner or proximal electron-dense layer in D. antillensis is supposedly composed of material very similar to that of the true acrosomal ray zone of the sperm of heterotremes, astacids, and some hermit crabs (Brown, 1966;Jamieson, 1990;Tudge, 1992). That the small indistinct dense region immediately lateral to the acrosome ray zone in Paradynomene is homologous with the well-developed outer acrosome zone seen in Dromidiopsis is particularly uncertain, and it is questionable that it merits recognition of a distinct zone.…”

Section: Nucleusmentioning

confidence: 99%

The ultrastructure of the spermatozoon ofParadynomene tuberculata Sakai, 1963 (Crustacea, Brachyura, Dynomenidae): Synapomorphies with dromiid sperm

Jamieson

Guinot

Forges

1993

Helgolander Meeresunters

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The dynomenid spermatozoon, exemplified here by Paradynomene tuberculata, resembles the spermatozoa of the Dromiidae, Homolidae and lyreidine raninoids and differs markedly from those of other crabs (the heterotreme, thoracotremes, raninines and raninoidines) in the depressed, discoidal form of the acrosome and the capitate form of the perforatorium. Four or five apparent dynomenid -dromiid sperm synapomorphies are recognizable. (1) Dynomenids (P. tuberculata) and dromiids differ from homohds and lyreidines in the greater depression of the acrosome (ratio of length to width ---0.3); (2) the capitate head of the perforatorium is bilaterally prolonged in P. tuberculata as in dromiids though symmetrical in homolids; (3) dynomenid and dromiid sperm lack the -albeit variably developed -posterior median process of the nucleus seen in homolids, anomurans, raninoids and lower heterotremes; (4) P. tuberculata, like dromiids and less distinctly homolids, has an apical protuberance of subopercular material through the opercular perforation, unknown in other crabs, being distinct from the apical button of thoracotreme sperm; (5) a less certain synapomorphy is the anterolateral electron-pale peripheral zone of the acrosome.These synapomorphies endorse a sister-group relationship of dynomenids and dromiids, P. tuberculata sperm differs notably from the sperm of dromiids in the more complex zonation of the acrosome. The perforatorium lacks the radial rays ("spiked wheel") of homolid sperm and does not show the "amoeboid" form seen in lyreidines. Absence of internal corrugations of the perforatorial chamber is a major difference from all examined raninids. Centrioles are only very tentatively identifiable. Nuclear arms are absent in glutaraldehyde fixed spermatozoa of P. tuberculata and have not been observed in the dromiid Petalomera lateralis but are present as three small radial vertices in the dromiid Dromidiopsis edwardsi and in homolids. P. tuberculata resembles Petalomera lateralis in the large size of the sperm nucleus relative to the acrosome compared with D. edwardsi and homolids.

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Comparative Ultrastructure of Hermit Crab Spermatozoa (Decapoda: Anomura: Paguroidea)

Cited by 36 publications

References 0 publications

Spermatological evidence supports the taxonomic placement of the Australian endemic hairy stone crab Lomis hirta (Decapoda: Anomura: Lomidae)

Spermatological evidence supports the taxonomic placement of the Australian endemic hairy stone crab Lomis hirta (Decapoda: Anomura: Lomidae)

The Ultrastructure of the Spermatozoon of Dromidiopsis-Edwardsi Rathbun, 1919 (Crustacea, Brachyura, Dromiidae) - Confirmation of a Dromiid Sperm Type

The ultrastructure of the spermatozoon ofParadynomene tuberculata Sakai, 1963 (Crustacea, Brachyura, Dynomenidae): Synapomorphies with dromiid sperm

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