Scanning electron microscopy of the ependymal surface of the third ventricle after silver nitrate staining

Hook terminology for the three-pronged hooks of Phoreiobothrium Linton, 1889 is reconciled with that for two-pronged hooks such that the two outermost prongs are considered homologous with the prongs of a two-pronged hook and the third inner prong is termed the basal prong. Scanning electron microscopy was performed on the scolex of Phoreiobothrium lasium Linton, 1889 and the solid nature of the bothridia was reconfirmed. Examination of material of all four species of Phoreiobothrium leads to the conclusion that each species possesses three-pronged hooks that are hollow and open to the outside via pores. The bothridia of each species are considered to be horizontally divided into two loculi, the posterior one being recessed and vertically subdivided. The diagnosis of the genus Phoreiobothrium is emended, and the four species allocated to it are redescribed. Phoreiobothrium is determined to be a monophyletic group on the basis of two synapomorphies and a key to the four species of the genus is presented.

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The Mechanism of active capture of animal food by the Sergestid Shrimp Acetes Sibogae Australis

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315400041588 ◽

1998 ◽

Vol 78 (2) ◽

pp. 497-508 ◽

Cited By ~ 4

Author(s):

Lachlan Mcleay ◽

C.G. Alexander

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Prey Capture ◽

Size Range ◽

The Third ◽

Feeding Modes ◽

In Captivity ◽

Combined Actions ◽

Wide Size Range ◽

Scanning Electron

Combining the use of scanning electron microscopy and microcinematography with functional and behavioural observations has clarified many aspects underlying the feeding processes of the small planktonic sergestid shrimp Acetes sibogae australis. In captivity Acetes sibogae australis is an opportunistic feeder that uses four principal feeding modes to capture a wide size range of prey: Artemia nauplii (<0.33 mm), copepods (<1mm) and moribund Acetes (up to 25 mm). Prey capture is effected by combined actions of the first three pairs of pereiopods and the third maxillipeds before transfer to the more dorsal second maxillipeds. The second maxillipeds are the principal appendages used in securing, manipulating, sorting and rejecting prey before insertion into the vicinity of the inner mouthparts.

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Identification of larvae of two Aphodius Helwig, 1798 (Coleoptera: Scarabaeidae: Aphodiinae) species using morphology and DNA barcode

Zootaxa ◽

10.11646/zootaxa.5047.2.4 ◽

2021 ◽

Vol 5047 (2) ◽

pp. 153-164

Author(s):

ANDREY V. FROLOV ◽

MARIA S. VISHNEVSKAYA ◽

LILIA A. AKHMETOVA

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Dna Barcode ◽

The Third ◽

Coi Sequences ◽

First Time ◽

Scanning Electron ◽

Third Instar Larvae

The third instar larvae of Aphodius (Alocoderus) hydrochaeris (Fabricius, 1798) and A. (Bodilus) ictericus (Laicharting, 1781) are described based on scanning electron microscopy and COI sequences. COI barcode sequence for A. (A.) hydrohaeris is provided for the first time. Two haplotypes are discovered in A. (B.) ictericus.

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First zoeal stage of the snapping shrimps Alpheus formosus Gibbes, 1850 and Alpheus malleator Dana, 1852 (Caridea: Alpheidae), with new characters to the genus

Zootaxa ◽

10.11646/zootaxa.4820.3.7 ◽

2020 ◽

Vol 4820 (3) ◽

pp. 540-550 ◽

Cited By ~ 1

Author(s):

KARMINE PASINATTO ◽

FERNANDO L. MANTELATTO ◽

MARIANA TEROSSI

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Zoeal Stage ◽

Proximal Segment ◽

Anal Spine ◽

The Third ◽

Snapping Shrimps ◽

First Time ◽

Scanning Electron

The first zoeae of Alpheus formosus Gibbes, 1850 and Alpheus malleator Dana, 1852 are described and illustrated for the first time, based on laboratory-hatched larvae from parental females sampled in Vitória Island, Ubatuba, Brazil. Both species shared many characters with other species of genus Alpheus Fabricius, 1798, but they also have some exclusive characters as 10 setae on the basis of the maxilla, first maxilliped with endopod 2-segmented and exopod 4-segmented, second maxilliped with exopod 4-segmented, presence of bud only of the first pereopod, presence of anal spine and simple dorsal setae on the pleon. The zoea I of both species, nevertheless, can be separated by segmentation in the exopod of the antenna (8 in A. formosus, 6 in A. malleator); segmentation in the endopod and exopod of the third maxilliped (5 in A. formosus and 4 in A. malleator); peduncle of antennule 3-segmented in A. formosus (unsegmented or 2-segmented in other species) and presence of a medial tubercle in the proximal segment in the exopod of the antenna of A. malleator (absent in A. formosus, not reported in all other species). In this study three new characters are proposed to be analyzed in zoea of the genus Alpheus: presence of anal spine in both species (absent in Alpheus saxidomus Holthuis, 1980, but not reported in other species) and for the first time reported, presence of a tubercle in the exopod of the antenna (present only in A. malleator) and presence of simple dorsal setae on the pleon (both species), here analyzed under light and scanning electron microscopy.

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