Cryptarius

Alexandre P. Marceniuk & Naércio A. Menezes, 2007, Systematics of the family Ariidae (Ostariophysi, Siluriformes), with a redefinition of the genera., Zootaxa 1416, pp. 1-126: 54-55

publication ID

z01416p001

publication LSID

lsid:zoobank.org:pub:FFC65592-D8DB-41BE-AEAC-A41EAB6C6185

persistent identifier

http://treatment.plazi.org/id/C0D873A6-3A4F-3EF3-5FB9-E8A428C044E0

treatment provided by

Thomas

scientific name

Cryptarius
status

 

Cryptarius  ZBK  Kailola, 2004

(fig. 42)

Cryptarius  ZBK  Kailola, 2004: 134. Type species: Arius truncatus  ZBK  Valenciennes, 1840. Type by original designation. Gender: masculine

Diagnosis. Cryptarius  ZBK  can be distinguished by the following exclusive (1 to 5) and shared (6 to 14) characters: (1) vomer arrow shaped; (2) epioccipital posterior process contacting median crest associated with neural spine of fourth vertebra; (3) anterior part of interopercle very long and pointed (fig. 43); (4) anterior part of metapterygoid contacting quadrate through an indented articulation, most of the remaining part of this bone simply contacting the quadrate (fig. 44); (5) posterior portion of second basibranchial very wide (fig. 45); (6) mesethmoid moderately thick at median portion (shared with Amphiarius  , Arius caelatus  ZBK  , A. madagascariensis  ZBK  , Aspistor  ZBK  , Galeichthys  ZBK  , Genidens  ZBK  , Hemiarius  ZBK  , Nedystoma  ZBK  , Nemapteryx  ZBK  , Neoarius  ZBK  , Netuma  , Notarius  ZBK  , Plicofollis  ZBK  , Potamosilurus  , Sciades assimilis  , S. bonillai  , S. felis  , S. platypogon  , S. sagor  and S. seemanni  ); (7) anterior part of anterior cranial fontanel indistinct, not limited by a mesial expansion of orbitosphenoid (shared with Galeichthys  ZBK  , Batrachocephalus  ZBK  , Cephalocassis  ZBK  , Doiichthys  ZBK  , Ketengus  ZBK  , Nedystoma  ZBK  and Nemapteryx  ZBK  ); (8) extrascapular subquadrangular [shared with Amphiarius  , Aspistor  ZBK  , Carlarius  , Cephalocassis  ZBK  , Cochlefelis  ZBK  , Doiichthys  ZBK  , Hemiarius  ZBK  , Nedystoma  ZBK  , Nemapteryx  ZBK  , Neoarius  ZBK  , Netuma  , Notarius  ZBK  , Potamarius izabalensis  ZBK  , Potamosilurus  (with exception of P. velutinus  ) and Sciades  ]; (9) posterior projection of epioccipital process contacting a small portion of the diagonal crest associated with neural spine of fourth vertebra (shared with Amphiarius  , Aspistor  ZBK  , Bagre  , Cephalocassis melanochir  , Cinetodus  ZBK  , Hemiarius  ZBK  , Notarius  ZBK  , Potamarius izabalensis  ZBK  and Sciades platypogon  ); (10) ventral crest of occipital process restricted to its base [shared with Arius  ZBK  , Batrachocephalus  ZBK  , Brustiarius  ZBK  , Carlarius  , Cochlefelis  ZBK  , Doiichthys  ZBK  , Galeichthys  ZBK  , Genidens  ZBK  , Ketengus  ZBK  , Neoarius  ZBK  , Netuma  , Notarius  ZBK  , Osteogeneiosus  ZBK  , Plicofollis  ZBK  , Potamarius  ZBK  , Potamosilurus  and Sciades  (with exception of S. platypogon  )]; (11) wing-like process of parasphenoid absent (shared with Batrachocephalus  ZBK  , Cephalocassis  ZBK  , Doiichthys  ZBK  , Ketengus  ZBK  , Nedystoma  ZBK  , Nemapteryx  ZBK  , Osteogeneiosus  ZBK  and Potamarius  ZBK  ); (12) lateral processes of urohyal long (shared with Amphiarius  , Arius  ZBK  , Aspistor  ZBK  , Bagre  , Brustiarius  ZBK  , Carlarius  , Cephalocassis melanochir  , Cochlefelis  ZBK  , Doiichthys  ZBK  , Hemiarius  ZBK  , Nedystoma  ZBK  , Nemapteryx  ZBK  , Neoarius  ZBK  , Netuma  , Notarius  ZBK  , Plicofollis platystomus  , Potamarius  ZBK  , Potamosilurus  and Sciades  ); (13) urohyal lateral processes almost as long as medial process (shared with Amphiarius  , Brustiarius  ZBK  , Carlarius  , Cephalocassis melanochir  , Cochlefelis  ZBK  , Galeichthys  ZBK  , Hemiarius  ZBK  , Neoarius  ZBK  , Netuma bilineatus  , Notarius  ZBK  , Potamosilurus  and Sciades  ); (14) crest associated with neural spine of third vertebra only slightly developed [shared with Arius  ZBK  , Batrachocephalus  ZBK  , Brustiarius  ZBK  , Carlarius  , Cochlefelis  ZBK  , Doiichthys  ZBK  , Galeichthys  ZBK  , Genidens  ZBK  , Ketengus  ZBK  , Neoarius  ZBK  , Netuma  , Notarius  ZBK  , Osteogeneiosus  ZBK  , Plicofollis  ZBK  , Potamarius  ZBK  , Potamosilurus  and Sciades  (with exception of S. platypogon  )].

Supplementary morphological characters. Cephalic shield granulated visible under the skin; lateral ethmoid and frontal bones limiting a large fenestra clearly visible under the skin; medial groove of neurocranium very distinct, limited by frontal bones and/or on supraoccipital; posterior cranial fontanel moderately developed, long and narrow; fenestra limited by supraoccipital, pterotic and sphenotic absent; fossa limited by pterotic, supracleithrum and extrascapular very reduced; epioccipital not invading dorsal portion of cephalic shield; occipital process triangular, moderately long and wide, narrowing progressively toward its posterior end; anterior and median nuchal plates fused and indistinct, forming a structure of semi-lunar aspect; tooth plates associated with vomer absent; accessory tooth plates small transversely elongated and oval shaped, bearing conical teeth; maxillary barbels fleshy and cylindrical; two pairs of mental barbels; base of adipose fin very short, less than one-half the length of anal-fin base; lateral line not bifurcated at caudal region, reaching base of caudal-fin upper lobe; cleithrum narrow, with second dorsal process on its upper portion; posterior cleithral process moderately long and distinct from second dorsal process of cleithrum.

Remarks. No specimen of C. daugueti  (Chevey, 1932) could be obtained for examination and data from descriptions available in the literature do not contain reliable information as to inclusion of the species into any of the genera we recognize. Thus, the inclusion of C. daugueti  in Cryptarius  ZBK  is preliminary and based on Kailola’s (2004) results.

Distribution and habitat. South and southeast Asia, brackish waters.