Euchlanis lyra Hudson 1886
Euchlanis lyra: dorsoventral view; a species that occurs in lotic waters (2).
 
Euchlanis lyra: ventral view; this specimen has been photographed with the foot orientated to the left side so that the posterior rim of the lorica is visible. In contrast to E. dilatata the posterior rim of the dorsal plate of the lorica is only slightly notched (arrowhead). (1)
 
Euchlanis lyra: detail of the posterior part of the dorsal lorica of a semi-macerated specimen (the rim of the lorica with the notch is visible). The arrows point to the openings of the lateral antennae, whereas the arrowheads mark the bases the so-called supra-anal sensory organ (Remane).(2)
 
Euchlanis lyra: two images of a specimen from (3). Upper image: diatoms in the intestinum. Lower image: compressed specimen showing different species of diatoms (for example:Diatoma sp. (arrowhead), Aulacoseira granulata (arrow)) that have been ingested.
 
Euchlanis lyra: malleate trophi of female specimen. The males do not have trophi (see image below). (1)
 
Euchlanis lyra: the arrowheads point to the small dents at the tips of the rami, a trait that is in contrast to Euchlanis deflexa (1)
 
Euchlanis lyra: male specimen. While in many monogonont species the sexual dimorphism (size; shape, digestive system, mastax) between males and females is very pronounced, the males of Euchlanis have similar size and similar shape like the females, but also lack the mastax. Also like many other monogonont males (another example is Epiphanes senta) a compartment of birefringent bodies in the vicinity of the sexual organs can be observed (out of focus in this image, arrow). Sp: sperm cells. (4)
 
 
 
 
Location (1): Wetter, NRW, Germany ; Elbschebach (creek);
Habitat (1): between algae (Cladophora sp.) and diatoms on stones (1). (click image to enlarge >>>). Together with Proales theodora
Date: 26.04.2021
 
 
Location (2): Gevelsberg, NRW, Germany, Stefansbach (creek)
Habitat (1): between algae (Cladophora sp.) and diatoms on stones (1). (click image to enlarge >>>).
Date: 03.05.2021
 
 
Location (3): Ennepetal, NRW, Sterngolfplatz, Ennepe river
 
Habitat (3): abundant on detritus on current-exposed stones; together with Proales theodora; Pleurotrocha petromyzon and Cephalodella exigua
 
Date (3): 14.05.2021
 
 
 
Location (4): Stang-Alar; Botanical Garden, Brest; Brittany, France
 
Habitat: detritus/ psammon in lotic water (click to enlarge >>>>)
 
Date: 28.08.2021
 
 
Location (3): Ennepetal, NRW, Sterngolfplatz, Ennepe river
Habitat (3): abundant on detritus on current-exposed stones; together with Proales theodora; Pleurotrocha petromyzon and Cephalodella exigua
Date (3): 14.05.2021
 
 
 
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