Baltic amber in the context of Glandular hair

Trichomes (/ˈtraɪkoʊmz, ˈtrɪkoʊmz/; from Ancient Greek τρίχωμα (tríkhōma) 'hair') are fine outgrowths or appendages on plants, algae, lichens, and certain protists. They are of diverse structure and function. Examples are hairs, glandular hairs, scales, and papillae. A covering of any kind of hair on a plant is an indumentum, and the surface bearing them is said to be pubescent.

Amber is fossilized tree resin. Examples of it have been appreciated for its color and natural beauty since the Neolithic times, and worked as a gemstone since classical antiquity. Amber is used in jewelry and as a healing agent in folk medicine.

There are five classes of amber, defined on the basis of their chemical constituents. Because it originates as a soft, sticky tree resin, amber sometimes contains animal and plant material as inclusions. Amber occurring in coal seams is also called resinite, and the term ambrite is applied to that found specifically within New Zealand coal seams.

Palaeovespa is an extinct genus of wasp in the Vespidae subfamily Vespinae. The genus currently contains eight species: five from the Priabonian stage Florissant Formation in Colorado, United States, two from the middle Eocene Baltic amber deposits of Europe, and one species from the late Paleocene of France.

Peripatidae is a family of velvet worms. This family includes more than 90 described species distributed among 13 genera, but some authorities deem only 80 of these species to be valid. The oldest putative representatives of the family herald from Burmese amber dated to the mid-Cretaceous, around 100 million years ago, with representatives from Dominican and Baltic amber attesting to a broader distribution in the Palaeogene / Neogene; molecular variability suggests that the family's crown group may have arisen in the early Mesozoic.

Rovno amber, occasionally called Ukrainian amber, is amber found in the Rivne Oblast and surrounding regions of Ukraine and Belarus. The amber is dated between Late Eocene and Early Oligocene, and suggested to be contemporaneous to Baltic amber (Prussian Formation). Major exploration and mining of the amber did not start until the 1990s.

Bitterfeld amber is amber found near the town of Bitterfeld in Saxony-Anhalt, Germany. While visually similar to the better known Baltic amber and often historically considered to be redeposited Baltic amber, chemical analysis shows that it is distinct from Baltic amber. The amber is thought to originate Eocene epoch, around the same time as Baltic amber. Like Baltic amber, the amber is renowned for its fossil inclusions such as those of arachnids and insects. The amber is found deposited in sands and silts of the Cottbus Formation, which is thought to be of late Oligocene age, considerably younger than the amber itself. Some fossil animal species are shared between Baltic and Bitterfeld ambers, supporting the idea that they were deposited at the same time, while both ambers have species apparently unique to them. The amber bearing deposit was excavated as part of a lignite coal mining operation active from 1975 to 1993, which resulted in over 400 tonnes of amber being unearthed. Compared to Baltic amber, the Bittefeld amber has been subject to considerably less research. The amber likely originated from a forested environment, perhaps a swamp forest. The source tree is suggested to have either belonged to Sciadopityaceae or to Pinaceae.