Pleurocarpous clade

Voucher Specimens for Taxa Examined in the Morphological Studies, and for Scoring of Optimized Characters for Taxa in Grade R and the Hypnodendroid Pleurocarp Clade... 

Vouchers for scoring of characters for taxa in grade R and in the hypnodendroid pleurocarp clade are provided in Table 3.1. Taxa in the Hypnidae were assumed to be pleurocarpous with distally produced perichaetial modules and to lack subperichaetial innovations, and taxa outside of the clade that includes grade R and the higher pleurocarps were assumed not to be pleurocarpous. Perichaetial module position and presence/absence of subperichaetial innovations were considered applicable to pleurocarpous taxa only (see discussion). 

The Most Frequent Character States within Some Important Pleurocarp Clades or Grades... 

Note PI, P2, P3 refer to principal nodes in the pleurocarp clade grades are in inverted commas, taxa for which the total number of species represents less than 0.1% of total species are indicated as - in column five. 

Additionally, they found clades within the rhizogonian grade (Aulacomnium, Calomnion and Orthodontium inclusive) that include both pleurocarpous and non-pleurocarpous taxa, raising the interesting possibility that pleurocarpy either originated more than once or that it was lost by reversion to acrocarpy. 

For the taxa sampled here, a clade including Leptostomum and all exemplars from Mniaceae s. lot. are the sister group of the rhizogonian mosses, the hypnodendroid pleurocarps and the Hypnidae. However, the support for this interpretation is inconclusive (DI = 1 bootstrap <50%). The sister group of Leptostomum + Mniaceae is a clade that includes Bartramiaceae and Rhacocarpus. 

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