Noteworthy records include three beetle species (Pterostichus brevicornis, P. middendorffi and Helophorus obscurellus) that today have their closest occurrences on either the Kanin or Kola peninsulas in arctic Russia.
The tandem index I y, z) relative to x is the number of times that z has a closest occurrence in x within head-to-head distance d from a corresponding, closest occurrence of y to its left.
In fact, the last occurrence of z is now counted only once, in association with its closest occurrence of y at p i +1.
To compute the relaxed tandem index, each oc-currence of z must be referred to its closest occurrence of y to the left.
Definition 4. The relaxed tandem index Î y, z) relative to x is the number of times that z has an occurrence in x within head-to-head distance d from a corresponding, closest occurrence of y to its left.
The close spatial occurrence of an assemblage (i.e. calcite + mantle silicates) requiring oxygen fugacities close to the CCO buffer (graphite/diamond-CO-CO2, i.e).e
We know of no other study that has attempted to evaluate partitioning in lycophytes, but given close physical occurrence of these four species together in many northeast temperate forests in the USA, this is an excellent area for future investigation.
However, the close co-occurrence of domestic livestock and Iberian ibex is the main threat to Capra pyrenaica conservation [ 34, 35], because domestic livestock might transmit diseases to Iberian ibex [ 44] and competes for resources [ 45].
The close temporal occurrence of RNAP II exclusion and Barr body formation suggests a link between Barr body formation and transcriptional repression, but the time-resolution of our differentiation experiments does not allow statements about their temporal order and mutual interdependence, which likely includes other factors as well.
Presence of pet allergy was the manifestation showing the closest co-occurrence with presence of possible asthma, presence of pollen allergy with presence of rhinitis, and presence of food allergy with presence of eczema.
