petasman.

Brit.

/pɛˈtazmə/,

/pᵻˈtazmə/, U.S.

/pɛˈtæzmə/,

/pəˈtæzmə/

Inflections: Plural petasmata, petasmas.

Origin: A borrowing from Greek. Etymon: Greek πέτασμα.

Etymology: < ancient Greek πέτασμα something spread out, used by Aristotle of the feelers of the polypus < πεταννύναι to spread out (see petal n.) + -σμα , extended form of -μα (see -oma comb. form).

Zoology.

A copulatory appendage attached to the first pair of pleopods in some male crustaceans, esp. penaeid shrimps.

ΘΚΠ

the world > animals > invertebrates > phylum Arthropoda > class Crustacea > [noun] > subclass Malacostraca > division Thoracostraca > order Decapoda > suborder Macrura > member of family Penaeidae of Caridea

penaeidean1852

petasma1888

tiger prawn1893

1888 C. S. Bate in Rep. Sci. Results Voy. H.M.S. Challenger: Zool. XXIV. 230 The pleopods [of Penaeus] are large and powerful, terminating in two foliaceous branches in every pair except the first, which in the male carries attached to the base a large membranous appendage that I call ‘petasma’.

1909 A. E. Shipley in A. Sedgwick Student's Text-bk. Zool. III. v. 527 In Penæus, Leucifer and Sergestes a lobe projects inwards from the base of the first pleopods in the male, and may unite with its fellow to form the petasma (or curtain).

1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) V. 105/1 The male [genital] system [of Eumalacostraca] consists of the testis, vas deferens, ductus ejaculatorius, and sometimes a penis, modified thoracic limbs (pleopods), or petasma.

1991 Jrnl. Fisheries Soc. Taiwan 18 145 The males transferred spermatophores into females' thelyca only after the ablated petasmas regenerated to the stage III.

1994 Jrnl. Exper. Marine Biol. & Ecol. 182 212 Males with fused petasmata (gonopods) were found throughout the year in both species.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	petasma
释义	petasman. Brit. /pɛˈtazmə/, /pᵻˈtazmə/, U.S. /pɛˈtæzmə/, /pəˈtæzmə/ Inflections: Plural petasmata, petasmas. Origin: A borrowing from Greek. Etymon: Greek πέτασμα. Etymology: < ancient Greek πέτασμα something spread out, used by Aristotle of the feelers of the polypus < πεταννύναι to spread out (see petal n.) + -σμα , extended form of -μα (see -oma comb. form). Zoology. A copulatory appendage attached to the first pair of pleopods in some male crustaceans, esp. penaeid shrimps. ΘΚΠ the world > animals > invertebrates > phylum Arthropoda > class Crustacea > [noun] > subclass Malacostraca > division Thoracostraca > order Decapoda > suborder Macrura > member of family Penaeidae of Caridea penaeidean1852 petasma1888 tiger prawn1893 1888 C. S. Bate in Rep. Sci. Results Voy. H.M.S. Challenger: Zool. XXIV. 230 The pleopods [of Penaeus] are large and powerful, terminating in two foliaceous branches in every pair except the first, which in the male carries attached to the base a large membranous appendage that I call ‘petasma’. 1909 A. E. Shipley in A. Sedgwick Student's Text-bk. Zool. III. v. 527 In Penæus, Leucifer and Sergestes a lobe projects inwards from the base of the first pleopods in the male, and may unite with its fellow to form the petasma (or curtain). 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) V. 105/1 The male [genital] system [of Eumalacostraca] consists of the testis, vas deferens, ductus ejaculatorius, and sometimes a penis, modified thoracic limbs (pleopods), or petasma. 1991 Jrnl. Fisheries Soc. Taiwan 18 145 The males transferred spermatophores into females' thelyca only after the ablated petasmas regenerated to the stage III. 1994 Jrnl. Exper. Marine Biol. & Ecol. 182 212 Males with fused petasmata (gonopods) were found throughout the year in both species. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.1888
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