Erro faltando

Está dando esse erro quando coloco pra rodar o código, o que pode ser? Performing hot restart... Syncing files to device sdk gphone64 x86 64... lib/main.dart:41:23: Error: Expected ')' before this. const Task(this.nome{super.key}); ^

Segue código:

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        title: 'Flutter Demo',
        theme: ThemeData(
          colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
          useMaterial3: true,
        ),
        home: Scaffold(
          appBar: AppBar(
            title: Text('Tarefas'),
          ),
          body: ListView(
            children: [
              const Task('Aprender Flutter'),
              const Task('Andar de bike'),
              const Task('Meditar'),
              const Task('Meditar'),
              const Task('Meditar'),
              const Task('Meditar'),
            ],
          ),
          floatingActionButton: FloatingActionButton(onPressed: () {}),
        ));
  }
}


class Task extends StatelessWidget {
  final String nome;
  const Task(this.nome{super.key});

  @override
  Widget build(BuildContext context) {
    return Container(
      child: Stack(
        children: [
          Container(
            color: Colors.blue,
            height: 140,
          ),
          Container(
            color: Colors.white,
            height: 100,
            child: Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                Container(
                  color: Colors.black26,
                  width: 72,
                  height: 100,
                ),
                Text(nome),
                ElevatedButton(
                  onPressed: () {}, child: Icon(Icons.arrow_drop_up),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }
}