Platybelodon - Facts and Figures

Platybelodon - Facts and Figures Name: Platybelodon (Greek for flat tusk); pronounced PLAT-ee-BELL-oh-don Habitat: Swamps, lakes and rivers of Africa and Eurasia Historical Epoch: Late Miocene (10 million years ago) Size and Weight: About 10 feet long and 2-3 tons Diet: Plants Distinguishing Characteristics: Flat, shovel-shaped, joined tusks on lower jaw; possible prehensile trunk About Platybelodon As you may have guessed from its name, Platybelodon (Greek for flat tusk) was a close relative of Amebelodon (shovel-tusk): both of these prehistoric elephants presumably used their flattened lower tusks to dig up the moist vegetation along the flooded plains, lakebeds and riverbanks of late Miocene Africa and Eurasia, about 10 million years ago. The main difference between the two was that Platybelodons fused silverware was much more advanced than Amebelodons, with a broad, concave, serrated surface that bore an uncanny resemblance to a modern spork; measuring about two or three feet long and a foot wide, it certainly gave this prehistoric proboscid a pronounced underbite. Recent scholarship has challenged the claim that Platybelodon wielded its lower tusk like a spork, digging this appendage deep into the muck and dredging up hundreds of pounds of vegetation. It turns out that Platybelodons double lower tusk was much more densely and robustly built than would have been required for this simple task; an alternative theory is that this elephant grasped the branches of trees with its trunk, then swung its massive head back and forth to scythe down the tough plants underneath, or eve strip and eat bark. (You can thank Henry Fairfield Osborn, the one-time director of the American Museum of Natural History, for the trunkless dredging scenario, which he popularized in the 1930s.)

Sphinx Moths, Family Sphingidae

Sphinx Moths, Family Sphingidae Members of the family Sphingidae, the sphinx moths, attract attention with their large size and ability to hover. Gardeners and farmers will recognize their larvae as the pesky hornworms that can wipe out a crop in a matter of days. All About Sphinx Moths Sphinx moths, also known as hawkmoths, fly fast and strong, with rapid wingbeats. Most are nocturnal, though some will visit flowers during the day. Sphinx moths are medium to large in size, with thick bodies and wingspans of 5 inches or more. Their abdomens typically end in a point. In sphinx moths, the hindwings are markedly smaller than the forewings. Antennae are thickened. Sphinx moth larvae are called hornworms, for a harmless but pronounced horn on the dorsal side of their hind ends. Some hornworms do significant damage to agricultural crops, and are therefore considered pests. In their final instars, sphinx moth caterpillars can be quite large, some measuring as long as your pinky finger. Classification of Sphinx Moths Kingdom – AnimaliaPhylum – ArthropodaClass – InsectaOrder – LepidopteraFamily - Sphingidae The Sphinx Moth Diet Most adults nectar on flowers, extending a long proboscis to do so. Caterpillars feed on a range of host plants, including both woody and herbaceous plants. Sphingid larvae usually have specific host plants, rather than being generalist feeders. The Sphinx MothLife Cycle Female moths lay eggs, usually singly, on host plants. Larvae may hatch within a few days or several weeks, depending on species and environmental variables. When the caterpillar reaches its final instar, it pupates. Most Sphingid larvae pupate in the soil, though some spin cocoons in leaf litter. In places where winter occurs, Sphingid moths overwinter in the pupal stage. Special Adaptations and Defenses of Sphinx Moths Some sphinx moths nectar on pale, deep flowers, employing an unusually long proboscis. The proboscis of certain Sphingidae species can measure a full 12 inches long. Sphinx moths are also famous for their ability to hover at flowers, much like hummingbirds. In fact, some Sphingids resemble bees or hummingbirds and can move sideways and stop in midair. Range and Distribution of Sphinx Moths Worldwide, over 1200 species of sphinx moths have been described. About 125 species of Sphingidae live in North America. Sphinx moths live on all continents except Antarctica.