The widely phaneromphalous form of many macluritoideans is similar to that of Lesueurilla but paired muscle scars are only known from the
operculum of some species of Maclurites Le Sueur, 1818 (Knight 1952: Rohr & Gubanov 1997; Rohr & Yochelson 1999).
In parallel, we also observed other conditions of the snails, including closing
operculum or hermitization, secreting corporal mucus, vertical crawling or climbing, feeding, and stooling.
Before dissection and after extraction from the shell, the conch is orientated with the
operculum toward the bottom left (in an 8 o'clock position), with the severed muscle attachment on the underside and the visceral mass on the bottom right (in a 4 o'clock position) when viewed from above (Fig.
MD: mandibular canal, PR: preopercular canal, PRMD: preoperculo mandibular canal, IO: infraocular canal, SO: supraorbital canal, OT: otic canal, PO: post-otic canal, ST: supratemporal canal, T: temporal canal, SOS: suborbital stay, op:
operculum, LL: lateral line, b) dorsal view.
: (A) Lamina foliar, (B) Tallo, (C) Estipulas, (D) Bracteas, (E) Boton floral, (F) Flor en antesis: cara adaxial, (G) Flor en antesis: cara abaxial, (H) Transcorte de flor, (I) Androginoforo y
operculum, (J)
Operculum, (K) Filamentos internos, (L) Estambre, (M) Estilo, (N) Ovario, (N) Fruto inmaduro, (O) Fruto maduro, (P) Semillas.
The distance between the axis of anthers to the corolla was 1.7 cm, while the distance to the
operculum was 2.9 cm.
We also examined these and found that, rather than a true stopper-like
operculum, these genera possess an internal "bilabiate" dehiscence mechanism that has not been described in detail before.
More than one isolate formed biofilm on the surface of the
operculum of M.
Sternopygus macrurus is identified as having an anguilliform body shape does not have a layer of skin on the eyes and its pigmentation is uniformly dark, presenting a prominent spot on the dorsum-posterior portion of the
operculum (Cella and Crampton, 2013).
From a video clip recorded in the wild, feeding frequency was counted as the number of
operculum opening and closing events where food items (substrate) and water were taken into the mouth and passed out via the gills.
We found that compared to chronic depression patients with moderate-to-severe psychotic symptoms, GMV was significantly decreased in the left
operculum cortex in chronic schizophrenia patients with moderate-to-severe depressive symptoms.
Morphological and behavioural changes observed in the fish include erratic swimming among juveniles and adults in especially in pHs 4 and 5, accelerated
operculum movement leading to gasping, barbells vibration and frequent coming to the surface.
The comparison between control and svPPA groups showed only connectivity differences between the right
operculum and the left putamen (Figure 1(b) and Table S2).
