Argulus Ambystoma, a New Species Parasitic on the Salamander Ambystoma Dumerilii from Mexico (Crustacea: Branchiura: Argulidae)

Author Institution: Department of Zoology, Southern Illinois UniversityA new species of Argulus is described based on 18 specimens taken from the salamander (achoque or ajolote) Ambystoma dumerilii Duges, collected in Lake Patzcuaro, Michoacan, Mexico. Diagnostic characters include the shape of the respiratory areas, number of sclerites in suction cup rods, and structures on the legs of males. Females are heavily stippled, whereas males have a very distinctive pigment pattern consisting of abundant melanophores covering the testes dors ally and two dark, inverted triangular patches on the carapace dorsally. The new species is similar to the North American species, A versicolor,A. americanus, A. maculosus, and A diversus. A single, dorsal pore was observed on each caudal ramus using scanning electron microscopy; these pores have not been reported previously in the Branchiura

Argulus yucatanus N. Sp. (Crustacea: Branchiura) Parasitic on Cichlasoma urophthalmus from Yucatan, Mexico

A new species, Argulus yucatanus, is described based on 14 specimens from Cichlasoma urophthalmus collected in Celestun Lagoon, Yucatan, Mexico. Diagnostic characters include the number of and shape of sclerites in the suction cup support rods, shape of and position of respiratory areas, and modifications on the legs of males. In males, the coxae of the 2nd legs bear an angular lobe with 5–7 erect scales and 13–21 sensilla. The new species is compared to Argulus funduli Krøyer, 1863, A. chromidis Krøyer, 1863, A. cubensis Wilson, 1936, A. rhamdiae Wilson, 1936, and A. varians Bere, 1936

Herpetofauna of the Little South Fork Basin (Cumberland River Drainage), Wayne and McCreary Counties, Kentucky

Author Institution: Department of Zoology, Southern Illinois UniversityAmphibians and reptiles were surveyed along Little South Fork (tributary of the Cumberland River) and other sites within the drainage basin from May-October 1996 and April-May 1997 to determine the distribution and composition of the herpetofauna. Twenty-three species of amphibians and reptiles were captured or observed. Based on published and unpublished accounts and museum records, 41 species of amphibians and reptiles are known from the basin in Wayne and McCreary counties. Chelydra serpentina and Sternotherus odoratus are known from Little South Fork, and the latter from Wayne County, for the first time. Graptemys geographica was distributed throughout the surveyed portion of Little South Fork. Leeches (Placob delta parasitical were found on two Graptemys geographica and one Chelydra serpentina

Describing and simulating concurrent quantum systems

We present a programming language for describing and analysing concurrent quantum systems. We have an interpreter for programs in the language, using a symbolic rather than a numeric calculator, and we give its performance on examples from quantum communication and cryptography

Remote Sensing of Drylands: Applications of Canopy Spectral Invariants

Remote sensing plays an important role in understanding the structure and function of global terrestrial ecosystems. In this project our research focus was to characterize the dryland vegetation structure and function in the western US. Sparse distribution of vegetation, low amount of leaves on the canopies and the bright soil underneath the canopy make remote sensing of drylands a challenging task. To achieve our research goal we collected aerial and ground based optical hyperspectral and lidar data concurrent to our field campaign. We studied the potential and limitations of these sensors to retrieve canopy biochemistry and structure and to map the vegetation cover at species level

KP line solitons and Tamari lattices

The KP-II equation possesses a class of line soliton solutions which can be qualitatively described via a tropical approximation as a chain of rooted binary trees, except at "critical" events where a transition to a different rooted binary tree takes place. We prove that these correspond to maximal chains in Tamari lattices (which are poset structures on associahedra). We further derive results that allow to compute details of the evolution, including the critical events. Moreover, we present some insights into the structure of the more general line soliton solutions. All this yields a characterization of possible evolutions of line soliton patterns on a shallow fluid surface (provided that the KP-II approximation applies).Comment: 49 pages, 36 figures, second version: section 4 expande

Medial axis and singularities

We correct one erroneous statement made in our recent paper "Medial axis and singularities".Comment: Some minor misprints are corrected and one final remark is adde