| Pseudaleuroplatus | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hemiptera |
| Suborder: | Sternorrhyncha |
| Family: | Aleyrodidae |
| Genus: | Pseudaleuroplatus Martin, 1999 |
Pseudaleuroplatus is an Australian genus of whiteflies in the family Aleyrodidae. [1] [2]
Puparia of Pseudaleuroplatus have a black cuticle (usually requiring bleaching before they can be examined). The margin is regularly toothed and (unlike some other whiteflies) is not modified at the caudal and thoracic tracheal openings. Each of the marginal teeth has a distinct, tubercular, dorsobasal gland. The submargin has only faint striae running a short distance mesad from between the marginal teeth. Additionally, the submargin is not differentiated from the dorsal disc by a regular furrow or fold. [1]
The dorsal disc has pores which may be indistinct or placed on papillae. The head usually lacks cephalic setae. The first abdominal setae are set close to the median line and are normal. Eighth abdominal setae are present and caudal setae are also usually present. The transverse moulting sutures do not reach the margin. The seventh abdominal segment is not significantly reduced in the middle. The vasiform orifice is cordate with its internal posterolateral margin being multiple-notched. It is fully occupied by the operculum and the lingula is obscured. A caudal furrow is absent. [1]
On the ventral surface of the pupa, the thoracic tracheal folds are slightly marked. The cuticle is not stippled. [1]
Superficially, this genus resembles Aleuroplatus , thus its name (pseudo- meaning "false"). It differs from Aleuroplatus in the marginal teeth being unmodified at tracheal openings and first abdominal setae being present. [1]
Pseudaleuroplatus kiensis is associated with Melaleuca sp. (Myrtaceae), while P. litseae is associated with Neolitsea dealbata (Lauraceae). [1] Some undescribed species have been collected from Mangifera , Pouteria , Leptospermum [1] and Syzygium paniculatum (Myrtaceae). [3]
Below are the two described species of Pseudaleuroplatus. [1] [2] Two undescribed species are also known. [1]
Whiteflies are Hemipterans that typically feed on the undersides of plant leaves. They comprise the family Aleyrodidae, the only family in the superfamily Aleyrodoidea. More than 1550 species have been described.
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This glossary of ichthyology is a list of definitions of terms and concepts used in ichthyology, the study of fishes.
Platecarpus is an extinct genus of aquatic lizards belonging to the mosasaur family, living around 84–81 million years ago during the middle Santonian to early Campanian, of the Late Cretaceous period. Fossils have been found in the United States and possible specimens in Belgium and Africa. A well-preserved specimen of Platecarpus shows that it fed on moderate-sized fish, and it has been hypothesized to have fed on squid, and ammonites as well. Like other mosasaurs, it was initially thought to have swum in an eel-like fashion, although another study suggests that it swam more like modern sharks. An exceptionally well-preserved specimen of P. tympaniticus known as LACM 128319 shows skin impressions, pigments around the nostrils, bronchial tubes, and the presence of a high-profile tail fluke, showing that it and other mosasaurs did not necessarily have an eel-like swimming method, but were more powerful, fast swimmers. It is held in the Natural History Museum of Los Angeles County. Isotopic analysis on teeth specimens has suggested that this genus and Clidastes may have entered freshwater occasionally, just like modern sea snakes.
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The slender sawtail catshark is a little-known species of catshark, part of the family Scyliorhinidae, endemic to northern Australia. It is found over the continental slope in 290–470 m (950–1,540 ft) on water. Growing to 34 cm (13 in) long, this shark has a slim gray body with four dark saddle markings below the dorsal fins and on the caudal fin, as well as a prominent crest of enlarged dermal denticles along the dorsal edge of the caudal fin. The slender sawtail catshark is not valued by fisheries but is taken as bycatch. The International Union for Conservation of Nature (IUCN) presently lacks enough information to assess its conservation status.
The mouse catshark is a species of catshark and part of the family Scyliorhinidae. It is common in the northeastern Atlantic Ocean from Iceland to Western Sahara. There is much taxonomic confusion regarding this species in Icelandic waters, where it may be confounded with another species of Galeus or Apristurus. Probably not exceeding 49 cm (19 in) long, the mouse catshark has a uniformly brown body and is characterized by large, rounded pelvic fins and crests of enlarged dermal denticles along both the dorsal and ventral caudal fin margins. In addition, in adult males the inner margins of the pelvic fins are merged into an "apron".
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The patchwork stingaree is a little-known species of stingray in the family Urolophidae, with a disjunct distribution off northwestern and northeastern Australia. It usually inhabits the outer continental shelf, at a depth of 60–320 m (200–1,050 ft). This species has a diamond-shaped pectoral fin disc much wider than long, and a short, flattened tail with a prominent dorsal fin and leaf-like caudal fin. There is a skirt-shaped curtain of skin between its nostrils. Its dorsal colour pattern resembles a mosaic of dark brown rings with light-coloured centers, separated by fine reticulated lines. The International Union for Conservation of Nature (IUCN) has listed the patchwork stingaree under Least Concern, as it is subject to minimal fishing pressure.
The greenback stingaree is a little-known species of stingray in the family Urolophidae, endemic to the outer continental shelf and upper continental slope off southeastern Australia. Growing to a length of 51 cm (20 in), this species has a diamond-shaped pectoral fin disc wider than long and uniformly light green in color above. Between its nostrils is a skirt-shaped curtain of skin. Its tail bears skin folds on either side and a deep, lanceolate caudal fin, but lacks a dorsal fin.
Insect morphology is the study and description of the physical form of insects. The terminology used to describe insects is similar to that used for other arthropods due to their shared evolutionary history. Three physical features separate insects from other arthropods: they have a body divided into three regions, three pairs of legs, and mouthparts located outside of the head capsule. This position of the mouthparts divides them from their closest relatives, the non-insect hexapods, which include Protura, Diplura, and Collembola.
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