TABLE 1 in Two new species of Metrichia Ross 1938 (Trichoptera: Hydroptilidae) from the Brazilian Amazon biome

TABLE 1. Diagnostic characters used to define Metrichia Species Groups (Flint 1972; Bueno-Soria & Holzenthal 2003). An en dash (-) means that the authors do not indicate whether the character is present or absent.
Metrichia Species GroupsInternal sacsDorsolateral hair-brushesPhallusM. nigritta GroupArising between abdominal terga V and VI-With two large hooks at nearly the midlength of the apical sectionM. penicillata GroupArising between abdominal terga IV and VPresent on the V and VI abdominal segmentsWith two large hooks at nearly the midlength of the apical sectionM. campana GroupArising between abdominal terga VI and VII-With subapical hooksM. exclamationes GroupArising between abdominal terga IV and VAbsentWith a single elongate spineM. aberrans GroupAbsentAbsentEnding in a bulbous lobe with two spines and a freely extending tubuleM. patagonica GroupAbsent-Without hook-like spines