BACKGROUND Decapods are the most recognizable of all crustaceans and comprise a dominant group of benthic invertebrates of the continental shelf and slope, including many species of economic importance. Of the 17635 morphologically described Decapoda species, only 5.4% are represented by COI barcode region sequences. It therefore remains a challenge to compile regional databases that identify a...

BACKGROUND Whole mitochondrial DNA is being increasingly utilized for comparative genomic and phylogenetic studies at deep and shallow evolutionary levels for a range of taxonomic groups. Although mitogenome sequences are deposited at an increasing rate into public databases, their taxonomic representation is unequal across major taxonomic groups. In the case of decapod crustaceans, several inf...

The Upper Cretaceous Coon Creek Lagerstätte of Tennessee, USA, is known for its extremely well-preserved mollusks and decapod crustaceans. However, the depositional environment of this unit, particularly its distance to the shoreline, has long been equivocal. To better constrain the coastal proximity of the Coon Creek Formation, we carried out a multiproxy geochemical analysis of fossil decapod...

The ventricular pressure-volume (PV) relationship has been used extensively to study the mechanics and energetics in multi-chambered hearts of closed circulatory system vertebrates. In the current study we applied the use of PV loops in the assessment of cardiac mechanics and energetics in the single ventricle of a decapod crustacean possessing an open circulatory system. Anatomical differences...

SYNOPSIS. The androgenic gland has been described in a variety of crustacean species—isopods, amphipods and decapods. It has been shown to play a role in the regulation of male differentiation and in the inhibition of female differentiation. Upon its application for endocrine manipulation, it inhibits female characteristics. Recently, the androgenic hormone from the isopod Armadillidium vulgare...

Decapod crustacean escape responses are adaptive behaviors whose neural bases are well understood. The escape circuit is composed of giant neurons. Lateral giant interneurons (LGs) respond to posterior stimuli by generating a somersaulting tailflip; medial giant interneurons (MGs) respond to anterior stimuli with a backwards tailflip. Both sets of interneurons connect to giant fast flexor motor...

Light microscopical observation of serial sections of four kinds of decapoda which living in seas around Japan (Ommastrephes sloanei pacificus, Sepia esculenta, Doryteuthis bleekeri, Sepioteuthis lessoniana) was carried out. These specimens were fixed alive with 10% formaldehyde solution diluted with sea water and then dehydrated without decalcification with ethylalcohol diluted with sea water....

New Mexico Museum of Natural History and Science (NMMNH) locality L-3845 in the Petrified Forest Formation of the Chinle Group (Rio Arriba County, NM) yields nonmarine fossil vertebrates, invertebrates, and plants of Revueltian (early-mid Norian, ~218-210 Ma) age. We describe a 48 mm long by 19 mm wide decapod specimen (NMMNH P-29041) that originated in one of several fining-upward depositional...