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Ophidiiformes (Cusk eels) >
Dinematichthyidae (Viviparous brotula)
Etymology: Didymothallus: Name from Greek 'didymos' for double or twofold and 'thallus' for branch in plants, referring to the two supporters of nearly equal length in the single pair of pseudoclaspers; criniceps: Name from Latin 'crinis' for hair and Greek 'cephalos' for head, refers to the many hair-like cirri on the occiput.
More on authors: Schwarzhans & Møller.
Περιβάλλον: περιβάλλον / κλιματική ζώνη / εύρος βάθους / εύρος διανομής
Οικολογία
Θαλασσινό(ά) Υφαλόφιλο(α); εύρος βάθους 0 - 5 m (Ref. 76869). Tropical
Western Pacific: Australia.
Μέγεθος / Βάρος / Ηλικία
Γεννητική Ωρίμανση: Lm ?  range ? - ? cm
Max length : 5.4 cm SL αρσενικό/απροσδιόριστο; (Ref. 76869); 6.0 cm SL (female)
Σύντομη περιγραφή
Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία
Μαλακές ραχιαίες ακτίνες (συνολικά) : 69 - 77; Μαλακές εδρικές ακτίνες: 52 - 61; Σπόνδυλοι: 42 - 45. This species is diagnosed by the following characters: D 69-77; A 52-61; D/A 23-26, V in D 1.9-2.1; vertebrae 12+30-33=42-45; multiple small cirri on occiput; a single (outer) pseudoclasper wing-shaped with 2 slender supporters, slightly bent, particularly the posterior one and are exactly of same length; 3-5 rows of scales on upper part of cheek, 2 rows on its lower part; otolith has a moderately pointed anterior tip and pronounced postdorsal angle, with undivided short sulcus, its centre anterior to centre of otolith, inclined with 5 to 10°, the otolith length to otolith height is 2.2, otolith length to sulcus length is 2.2-2.4 (Ref. 76869).
Body shape (shape guide): elongated.
Some of the female specimens were observed to have 9-18 eggs in the body cavity, 2 females (of 44 mm SL) were opened and found to contain orange-coloured eggs, 1.4-1.7
mm in diameter; no reported specimens have embryos inside. This observation apparently indicate that this species is oviparous rather than viviparous, which is an assumed diagnostic character for all Bythitoidei. However, this first indication will need to be confirmed by in-life observation (Ref. 76869).
Κύκλος ζωής και συμπεριφορά ζευγαρώματος
Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Αβγά | Γονιμότητα | Προνύμφες
Schwarzhans, W. and P.R. Møller, 2007. Review of the Dinematichthyini (Teleostei: Bythitidae) of the Indo-west Pacific. Part III. Beaglichthys, Brosmolus, Monothrix and eight new genera with description of 20 new species. The Beagle, Records of the Museums and Art Galleries of the Northern Territory 23:29-110. (Ref. 76869)
Κατάσταση Κόκκινου Καταλόγου IUCN (Ref. 130435: Version 2025-2 (Global))
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Διαδικτυακές πηγές
Εκτιμήσεις βάσει μοντέλων
Δείκτης φυλογενετικής ποικιλότητας (Αναφ. 82804) |
PD50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245). |
Τροφικό Επίπεδο (Αναφ. 69278) |
3.3 ±0.5 se; based on size and trophs of closest relatives |
Ευπάθεια στην αλιεία (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |