The cephalon is the head section of an arthropod. It is a tagma, i.e., a specialized grouping of arthropod segments. The word cephalon derives from the...

Arthropods (/ˈɑːrθrəpɒd/ ARTH-rə-pod) are invertebrates in the phylum Arthropoda. They possess an exoskeleton with a cuticle made of chitin, often mineralised...

they influence. The tagmata of a trilobite: cephalon, thorax and pygidium Tagmata of an insect: head (cephalon), thorax and abdomen Tagmata and major appendages...

This list contains many extinct arthropod[1] genera from the Cambrian Period of the Paleozoic Era. Some trilobites, bradoriids and phosphatocopines may...

trilobites by bearing a comparatively large, semicircular brim around the cephalon (head) which is often perforated by small pores. This brim is thought to serve...

lobes") are extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest known groups of arthropods. The first appearance of...

million years ago. In some arthropods, especially trilobites, the cephalon, or cephalic region, is the region of the head which is a collective of "fused...

an eye-bearing cephalon (head) and segmented trunk region, dorsally divided by a series of tergites (dorsal exoskeleton). The cephalon could be divided...

Sea spiders are marine arthropods of the order Pantopoda (lit. ‘all feet’), belonging to the class Pycnogonida, hence they are also called pycnogonids...

clypeata is flattened (dorsoventrally). It has 11 segments in total: the cephalon (the head), nine thoracic tergites (each of which covers a somite), and one...

division, so the validity of the term cephalothorax, which means a fused cephalon, or head, and thorax, has been questioned. Also, arguments exist against use...

which are grouped into three regions: the cephalon or head, the pereon or thorax, and the pleon or abdomen. The head and thorax may be fused together to form...

is estimated to have a length up to 22.8 cm (9.0 in). Its cephalon have semicircular head shield, a uniramous and a long biramous antenna and three pairs...

thylakos, meaning "pouch", and κεφαλή or cephalon meaning "head") are group of extinct probable mandibulate arthropods, that have been considered by some researchers...

also called prosoma in some groups, is a tagma of various arthropods, comprising the head and the thorax fused together, as distinct from the abdomen...

small-sized (up to 2 cm) marine arthropod, with an oval-shaped non-calcified exoskeleton. Both the head shield (or cephalon) and the tail shield (or pygidium)...

can range from extremely small (much smaller than the head, or cephalon) to larger than the cephalon. They can be smooth, as in order Asaphida, or spiny...

validity of the latter terms. While the term cephalothorax implies a fused cephalon (head) and thorax, there is currently neither fossil nor embryological evidence...

possession of head shields with two or three pairs of elongate spine-like projections, and three pairs of uniramous appendages on the cephalon, while Acercostraca...

isopygous, meaning their pygidium is similar in size and shape to their cephalon. Most agnostid species were eyeless. The systematic position of the order...

as the librigenal area of the cephalon would split along the suture, exposing the other areas of the trilobites head. The glabella was roughly the same...

specialized. As an arthropod, D. personata is bilaterally symmetrical. The body is composed of a head, which contains the cephalon, and an elongated trunk...

ISSN 2662-4435. Briggs, Derek E. G.; Collins, Desmond (1999). "The Arthropod Alalcomenaeus cambricus Simonetta, from the Middle Cambrian Burgess Shale...

outermost spines). Its head shield (or cephalon) is hexagonal, with three pairs of spines extending from each of the corners of the cephalon, all almost 2⁄3...

with each unit becoming progressively larger as they approach the cephalon-like head. The generic name is a compound word, with the Latin prefix prae "before"...

argument against the validity of the term cephalothorax, which means fused cephalon (head) and the thorax. Similarly, arguments can be formed against the use...

of the community. The body is divided into two main segments. The cephalon ("head")/prosoma with seven segments/8 somites, and the trunk with 12 segments...

2020 in arthropod paleontology is a list of new arthropod fossil taxa, including arachnids, crustaceans, insects, trilobites, and other arthropods that were...

or 2.0 inches to 12 centimetres or 4.7 inches), soft bodied artiopodan arthropods that lived during the late Middle and Upper Cambrian on the former paleocontinent...

are attached at midlength of the cephalon, in combination with effaced features of the raised axial area of the head shield (or glabella). The name of...