Subfamily Chonelasmatinae Schrammen, 1912

Museums

Regional Maps

Diagnosis

Primary oscula are represented by terminal aperture of tube or funnel body forms, or the expanded exhalant surface of blade- or fan-shaped forms; accessory oscula may be apertures flush on the lateral body or projected as short or extended, sometimes branching tubule systems; channelization may be absent or consist of epirhyses with or without aporhyses, or amararhyses in one genus; very elongate rectangular dictyonal meshes and conspicuous transverse lamellae are common in most genera but may be absent in some; dermalia and atrialia (where differentiable) are pentactins or pinular hexactins; uncinates and scopules are present in all but one genus; microscleres occur as oxyhexasters and/or discohexasters.

ID Keys

KEY TO GENERA
(1) Tubular body form, without branching --------------------------------------------------------------- Pleurochorium
Funnel, blade or fan form body ----------------------------------------------------------------------------------------------- 2

(2) Funnel (or plate) form in fragments---------------------------------------------------------------------------------------- 3
Blade (Fig. 1G) or fan form body with surfaces reversed ------------------------------------------------------------------ 6

(3) Without lateral oscula --------------------------------------------------------------------------------------- Chonelasma
With lateral oscula---------------------------------------------------------------------------------------------------------------- 4

(4) Without elongate primary meshes, uncinates and scopules ------------------------------------------------- Myliusia
With elongate primary meshes, uncinates and scopules -------------------------------------------------------------------- 5

(5) With secondary branching tubes as lateral extensions ----------------------------------------------- Periphragella
Without secondary branching tubes on lateral surface --------------------------------------------- Verrucocoeloidea

(6) Thin, blade-form body -------------------------------------------------------------------------------------- Bathyxiphus
Fan or ear-shaped body with horizontal ridges on inner surface ------------------------------------------- Tretochone

Diagnosis References

Reiswig, H. & Wheeler, B. 2002. Family Euretidae Zittel, 1877. pp. 1301-1331 in Hooper, J.N.A. & Soest, R.W.M. Van (eds). Systema Porifera. A guide to the classification of sponges. New York : Kluwer Academic/Plenum Publishers Vol. 2. [1318]

History of changes