Macrotrachela papillosa Thompson, 1892
Macrotrachela papillosa: is a very slowly creeping animal.
Macrotrachela papillosa: two aspects of the anterior region of a creeping specimen. Left image shows two characteristic protrusions at the head when the wheel pedicels are retracted (arrowheads). Right image: Rostrum with two-lobed lamella.
Macrotrachela papillosa: two aspects of a creeping specimen. Because of the conspicuous transversal folds on the ventral cuticula this species maybe confused with Pleuretra lineata.
Macrotrachela papillosa: two aspects of the foot with spurs and 3 toes which is a feature to distinguish from Pleuretra (4 toes). The spurs have a separated tip.
Macrotrachela papillosa is oviparous; specimen with egg.
Macrotrachela papillosa: focal plane on the trophi with dental formula 2/2-5/5.
Macrotrachela papillosa: with trophi of specimen with dental formula 4/4 (4)
Macrotrachela papillosa; another specimen from (2) focal plane on the protrusions of the 1st and last rump segments.
Macrotrachela papillosa; whirling could be rarely observed (specimen from (3)).
Macrotrachela papillosa; trophi from specimen from (4).
Differential diagnosis: M. papillosa maybe confused with M. aculeata, M. multispinosa and Pleuretra lineata. M. aculeata has a granulated foot with a bump on the 1st footsegement. M. multispinosa has spines instead of blunt protrusions on rump cuticula. Pleuretra lineata has 4 toes and no protrusions.
Location: Wahner Heide near Cologne/ Germany (1), Haspelmoor, Bavaria (2); Nature reserve Schwalm/Nette (3); Gevelsberg, Green Classroom, moss
Habitat: bog with submerged mosses; sphagnum bog (2,3), wet moss(4)
Date: 12.03.2010 (1); 26.08.2012 (2); 19.12.2012 (3) 2.3.2009 (4)
freshwater life
marine life